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engineering</title> <meta name="description" content="Search results for: hydraulic engineering"> <meta name="keywords" content="hydraulic engineering"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block 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action="https://publications.waset.org/abstracts/search"> <div id="custom-search-input"> <div class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="hydraulic engineering"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 3646</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: hydraulic engineering</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3646</span> The Thermal Simulation of Hydraulic Cable Drum Trailers 15-Ton</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Abdul-Razzak%20Aboudi%20Al-Issa">Ahmad Abdul-Razzak Aboudi Al-Issa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thermal is the main important aspect in any hydraulic system since it is affected on the hydraulic system performance. Therefore must be simulated the hydraulic system -that was designed- in this aspect before constructing it. In this study, an existed expert system was using to simulate the thermal aspect of a designed hydraulic system that will be used in an industrial field. The expert system which is used in this study is (Hydraulic System Calculations), and its symbol (HSC). HSC had been designed and coded in an interactive program userfriendly named (Microsoft Visual Basic 2010). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fluid%20power" title="fluid power">fluid power</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20system" title=" hydraulic system"> hydraulic system</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydrodynamic" title=" thermal and hydrodynamic"> thermal and hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=expert%20system" title=" expert system"> expert system</a> </p> <a href="https://publications.waset.org/abstracts/17006/the-thermal-simulation-of-hydraulic-cable-drum-trailers-15-ton" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17006.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">500</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3645</span> Design an Expert System to Assess the Hydraulic System in Thermal and Hydrodynamic Aspect</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmad%20Abdul-Razzak%20Aboudi%20Al-Issa">Ahmad Abdul-Razzak Aboudi Al-Issa</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Thermal and Hydrodynamic are basic aspects in any hydraulic system and therefore, they must be assessed with regard to this aspect before constructing the system. This assessment needs a good expertise in this aspect to obtain an efficient hydraulic system. Therefore, this study aims to build an expert system called Hydraulic System Calculations (HSC) to ensure a smooth operation for the hydraulic system. The expert system (HSC) had been designed and coded in an user-friendly interactive program called Microsoft Visual Basic 2010. The suggested code provides the designer with a number of choices to resolve the problem of hydraulic oil overheating which may arise during the continuous operation of the hydraulic unit. As a result, the HSC can minimize the human errors, effort, time and cost of hydraulic machine design. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fluid%20power" title="fluid power">fluid power</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20system" title=" hydraulic system"> hydraulic system</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20and%20hydrodynamic" title=" thermal and hydrodynamic"> thermal and hydrodynamic</a>, <a href="https://publications.waset.org/abstracts/search?q=expert%20system" title=" expert system"> expert system</a> </p> <a href="https://publications.waset.org/abstracts/4076/design-an-expert-system-to-assess-the-hydraulic-system-in-thermal-and-hydrodynamic-aspect" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/4076.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">445</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3644</span> A Study on the Life Prediction Performance Degradation Analysis of the Hydraulic Breaker</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jong%20Won">Jong Won</a>, <a href="https://publications.waset.org/abstracts/search?q=Park"> Park</a>, <a href="https://publications.waset.org/abstracts/search?q=Sung%20Hyun"> Sung Hyun</a>, <a href="https://publications.waset.org/abstracts/search?q=Kim"> Kim </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The kinetic energy to pass subjected to shock and chisel reciprocating piston hydraulic power supplied by the excavator using for the purpose of crushing the rock, and roads, buildings, etc., hydraulic breakers blow. Impact frequency, efficiency measurement of the impact energy, hydraulic breakers, to demonstrate the ability of hydraulic breaker manufacturers and users to a very important item. And difficult in order to confirm the initial performance degradation in the life of the hydraulic breaker has been thought to be a problem.In this study, we measure the efficiency of hydraulic breaker, Impact energy and Impact frequency, the degradation analysis of research to predict the life. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=impact%20energy" title="impact energy">impact energy</a>, <a href="https://publications.waset.org/abstracts/search?q=impact%20%20frequency" title=" impact frequency"> impact frequency</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20breaker" title=" hydraulic breaker"> hydraulic breaker</a>, <a href="https://publications.waset.org/abstracts/search?q=life%20prediction" title=" life prediction"> life prediction</a> </p> <a href="https://publications.waset.org/abstracts/14055/a-study-on-the-life-prediction-performance-degradation-analysis-of-the-hydraulic-breaker" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/14055.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">441</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3643</span> Prediction of Unsaturated Permeability Functions for Clayey Soil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=F.%20Louati">F. Louati</a>, <a href="https://publications.waset.org/abstracts/search?q=H.%20Trabelsi"> H. Trabelsi</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Jamei"> M. Jamei</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Desiccation cracks following drainage-humidification cycles. With water loss, mainly due to evaporation, suction in the soil increases, producing volumetric shrinkage and tensile stress. When the tensile stress reaches tensile strength, the soil cracks. Desiccation cracks networks can directly control soil hydraulic properties. The aim of this study was for quantifying the hydraulic properties for examples the water retention curve, the saturated hydraulic conductivity, the unsaturated hydraulic conductivity function, the shrinkage dynamics in Tibar soil- clay soil in the Northern of Tunisia. Then a numerical simulation of unsaturated hydraulic properties for a crack network has been attempted. The finite elements code ‘CODE_BRIGHT’ can be used to follow the hydraulic distribution in cracked porous media. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=desiccation" title="desiccation">desiccation</a>, <a href="https://publications.waset.org/abstracts/search?q=cracks" title=" cracks"> cracks</a>, <a href="https://publications.waset.org/abstracts/search?q=permeability" title=" permeability"> permeability</a>, <a href="https://publications.waset.org/abstracts/search?q=unsaturated%20hydraulic%20flow" title=" unsaturated hydraulic flow"> unsaturated hydraulic flow</a>, <a href="https://publications.waset.org/abstracts/search?q=simulation" title=" simulation"> simulation</a> </p> <a href="https://publications.waset.org/abstracts/44245/prediction-of-unsaturated-permeability-functions-for-clayey-soil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/44245.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">299</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3642</span> Advancements in Hydraulic Fracturing for Unconventional Resources</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salar%20Ahmed%20Ali">Salar Ahmed Ali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydraulic fracturing has revolutionized the extraction of unconventional oil and gas resources, significantly increasing global energy reserves. This paper explores recent advancements in hydraulic fracturing technologies, focusing on the integration of real-time monitoring systems, environmentally friendly fracturing fluids, and nanotechnology applications. Case studies demonstrate how innovative approaches have enhanced resource recovery while minimizing environmental impact and operational costs. Additionally, the paper addresses challenges such as induced seismicity and regulatory constraints, proposing solutions to ensure sustainable development. These advancements promise to make hydraulic fracturing more efficient, sustainable, and adaptable to the evolving energy landscape. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=oil" title="oil">oil</a>, <a href="https://publications.waset.org/abstracts/search?q=gas" title=" gas"> gas</a>, <a href="https://publications.waset.org/abstracts/search?q=fracture" title=" fracture"> fracture</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic" title=" hydraulic"> hydraulic</a> </p> <a href="https://publications.waset.org/abstracts/194790/advancements-in-hydraulic-fracturing-for-unconventional-resources" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/194790.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">8</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3641</span> Energy Efficient Alternate Hydraulic System Called TejHydroLift</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tejinder%20Singh">Tejinder Singh</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper describes a new more efficient Hydraulic System which uses lesser work to produce more output. Conventional Hydraulic System like Hydraulic Lifts and Rams use lots of water to be pumped to produce output. TejHydroLift will do the equal amount of force with lesser input of water. The paper will show that force applied can be increased manifold without requiring to move smaller force by more distance which used to be required in Conventional Hydraulic Lifts. The paper describes one of the configurations of TejHydroLift System called “Slim Antenna TejHydroLift Configuration”. The TejHydroLift uses lesser water and hence demands lesser work to be performed to move the same load. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=alternate" title="alternate">alternate</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20system" title=" hydraulic system"> hydraulic system</a>, <a href="https://publications.waset.org/abstracts/search?q=efficient" title=" efficient"> efficient</a>, <a href="https://publications.waset.org/abstracts/search?q=TejHydroLift" title=" TejHydroLift"> TejHydroLift</a> </p> <a href="https://publications.waset.org/abstracts/31551/energy-efficient-alternate-hydraulic-system-called-tejhydrolift" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/31551.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">259</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3640</span> Hydraulic Analysis of Irrigation Approach Channel Using HEC-RAS Model</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Muluegziabher%20Semagne%20Mekonnen">Muluegziabher Semagne Mekonnen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study was intended to show the irrigation water requirements and evaluation of canal hydraulics steady state conditions to improve on scheme performance of the Meki-Ziway irrigation project. The methodology used was the CROPWAT 8.0 model to estimate the irrigation water requirements of five major crops irrigated in the study area. The results showed that for the whole existing and potential irrigation development area of 2000 ha and 2599 ha, crop water requirements were 3,339,200 and 4,339,090.4 m³, respectively. Hydraulic simulation models are fundamental tools for understanding the hydraulic flow characteristics of irrigation systems. Hydraulic simulation models are fundamental tools for understanding the hydraulic flow characteristics of irrigation systems. In this study Hydraulic Analysis of Irrigation Canals Using HEC-RAS Model was conducted in Meki-Ziway Irrigation Scheme. The HEC-RAS model was tested in terms of error estimation and used to determine canal capacity potential. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=HEC-RAS" title="HEC-RAS">HEC-RAS</a>, <a href="https://publications.waset.org/abstracts/search?q=irrigation" title=" irrigation"> irrigation</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic.%20canal%20reach" title=" hydraulic. canal reach"> hydraulic. canal reach</a>, <a href="https://publications.waset.org/abstracts/search?q=capacity" title=" capacity"> capacity</a> </p> <a href="https://publications.waset.org/abstracts/183197/hydraulic-analysis-of-irrigation-approach-channel-using-hec-ras-model" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/183197.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">60</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3639</span> Hydraulic Studies on Core Components of PFBR</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=G.%20K.%20Pandey">G. K. Pandey</a>, <a href="https://publications.waset.org/abstracts/search?q=D.%20Ramadasu"> D. Ramadasu</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Banerjee"> I. Banerjee</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Vinod"> V. Vinod</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20Padmakumar"> G. Padmakumar</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Prakash"> V. Prakash</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20K.%20Rajan"> K. K. Rajan</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Detailed thermal hydraulic investigations are very essential for safe and reliable functioning of liquid metal cooled fast breeder reactors. These investigations are further more important for components with complex profile, since there is no direct correlation available in literature to evaluate the hydraulic characteristics of such components directly. In those cases available correlations for similar profile or geometries may lead to significant uncertainty in the outcome. Hence experimental approach can be adopted to evaluate these hydraulic characteristics more precisely for better prediction in reactor core components. Prototype Fast Breeder Reactor (PFBR), a sodium cooled pool type reactor is under advanced stage of construction at Kalpakkam, India. Several components of this reactor core require hydraulic investigation before its usage in the reactor. These hydraulic investigations on full scale models, carried out by experimental approaches using water as simulant fluid are discussed in the paper. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=fast%20breeder%20reactor" title="fast breeder reactor">fast breeder reactor</a>, <a href="https://publications.waset.org/abstracts/search?q=cavitation" title=" cavitation"> cavitation</a>, <a href="https://publications.waset.org/abstracts/search?q=pressure%20drop" title=" pressure drop"> pressure drop</a>, <a href="https://publications.waset.org/abstracts/search?q=reactor%20components" title=" reactor components"> reactor components</a> </p> <a href="https://publications.waset.org/abstracts/2579/hydraulic-studies-on-core-components-of-pfbr" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/2579.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">463</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3638</span> Thermal and Acoustic Design of Mobile Hydraulic Vehicle Engine Room</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Homin%20Kim">Homin Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyungjo%20Byun"> Hyungjo Byun</a>, <a href="https://publications.waset.org/abstracts/search?q=Jinyoung%20Do"> Jinyoung Do</a>, <a href="https://publications.waset.org/abstracts/search?q=Yongil%20Lee"> Yongil Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=Hyunho%20Shin"> Hyunho Shin</a>, <a href="https://publications.waset.org/abstracts/search?q=Seungbae%20Lee"> Seungbae Lee</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Engine room of mobile hydraulic vehicle is densely packed with an engine and many hydraulic components mostly generating heat and sound. Though hydraulic oil cooler, ATF cooler, and axle oil cooler etc. are added to vehicle cooling system of mobile vehicle, the overheating may cause downgraded performance and frequent failures. In order to improve thermal and acoustic environment of engine room, the computational approaches by Computational Fluid Dynamics (CFD) and Boundary Element Method (BEM) are used together with necessary modal analysis of belt-driven system. The engine room design layout and process, which satisfies the design objectives of sound power level and temperature levels of radiator water, charged air cooler, transmission and hydraulic oil coolers, is discussed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=acoustics" title="acoustics">acoustics</a>, <a href="https://publications.waset.org/abstracts/search?q=CFD" title=" CFD"> CFD</a>, <a href="https://publications.waset.org/abstracts/search?q=engine%20room%20design" title=" engine room design"> engine room design</a>, <a href="https://publications.waset.org/abstracts/search?q=mobile%20hydraulics" title=" mobile hydraulics"> mobile hydraulics</a> </p> <a href="https://publications.waset.org/abstracts/61957/thermal-and-acoustic-design-of-mobile-hydraulic-vehicle-engine-room" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/61957.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">326</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3637</span> Energy Efficiency Improvement of Excavator with Independent Metering Valve by Continuous Mode Changing Considering Engine Fuel Consumption</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Sang-Wook%20Lee">Sang-Wook Lee</a>, <a href="https://publications.waset.org/abstracts/search?q=So-Yeon%20Jeon"> So-Yeon Jeon</a>, <a href="https://publications.waset.org/abstracts/search?q=Min-Gi%20Cho"> Min-Gi Cho</a>, <a href="https://publications.waset.org/abstracts/search?q=Dae-Young%20Shin"> Dae-Young Shin</a>, <a href="https://publications.waset.org/abstracts/search?q=Sung-Ho%20Hwang"> Sung-Ho Hwang</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydraulic system of excavator gets working energy from hydraulic pump which is connected to output shaft of engine. Recently, main control valve (MCV) which is composed of several independent metering valve (IMV) has been introduced for better energy efficiency of the hydraulic system so that fuel efficiency of the excavator can be improved. Excavator with IMV has 5 operating modes depending on the quantity of regeneration flow. In this system, the hydraulic pump is controlled to supply demanded flow which is needed to operate each mode. Because the regenerated flow supply energy to actuators, the hydraulic pump consumes less energy to make same motion than one that does not regenerate flow. The horse power control is applied to the hydraulic pump of excavator for maintaining engine start under a heavy load and this control makes the flow of hydraulic pump reduced. When excavator is in complex operation such as loading or unloading soil, the hydraulic pump discharges small quantity of working fluid in high pressure. At this operation, the engine of excavator does not run at optimal operating line (OOL). The engine needs to be operated on OOL to improve fuel efficiency and by controlling hydraulic pump the engine can drive on OOL. By continuous mode changing of IMV, the hydraulic pump is controlled to make engine runs on OOL. The simulation result of this study shows that fuel efficiency of excavator with IMV can be improved by considering engine OOL and continuous mode changing algorithm. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=continuous%20mode%20changing" title="continuous mode changing">continuous mode changing</a>, <a href="https://publications.waset.org/abstracts/search?q=engine%20fuel%20consumption" title=" engine fuel consumption"> engine fuel consumption</a>, <a href="https://publications.waset.org/abstracts/search?q=excavator" title=" excavator"> excavator</a>, <a href="https://publications.waset.org/abstracts/search?q=fuel%20efficiency" title=" fuel efficiency"> fuel efficiency</a>, <a href="https://publications.waset.org/abstracts/search?q=IMV" title=" IMV"> IMV</a> </p> <a href="https://publications.waset.org/abstracts/89388/energy-efficiency-improvement-of-excavator-with-independent-metering-valve-by-continuous-mode-changing-considering-engine-fuel-consumption" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89388.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">385</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3636</span> Hydraulic Conductivity Prediction of Cement Stabilized Pavement Base Incorporating Recycled Plastics and Recycled Aggregates</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Md.%20Shams%20Razi%20Shopnil">Md. Shams Razi Shopnil</a>, <a href="https://publications.waset.org/abstracts/search?q=Tanvir%20Imtiaz"> Tanvir Imtiaz</a>, <a href="https://publications.waset.org/abstracts/search?q=Sabrina%20Mahjabin"> Sabrina Mahjabin</a>, <a href="https://publications.waset.org/abstracts/search?q=Md.%20Sahadat%20Hossain"> Md. Sahadat Hossain</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Saturated hydraulic conductivity is one of the most significant attributes of pavement base course. Determination of hydraulic conductivity is a routine procedure for regular aggregate base courses. However, in many cases, a cement-stabilized base course is used with compromised drainage ability. Traditional hydraulic conductivity testing procedure is a readily available option which leads to two consequential drawbacks, i.e., the time required for the specimen to be saturated and extruding the sample after completion of the laboratory test. To overcome these complications, this study aims at formulating an empirical approach to predicting hydraulic conductivity based on Unconfined Compressive Strength test results. To do so, this study comprises two separate experiments (Constant Head Permeability test and Unconfined Compressive Strength test) conducted concurrently on a specimen having the same physical credentials. Data obtained from the two experiments were then used to devise a correlation between hydraulic conductivity and unconfined compressive strength. This correlation in the form of a polynomial equation helps to predict the hydraulic conductivity of cement-treated pavement base course, bypassing the cumbrous process of traditional permeability and less commonly used horizontal permeability tests. The correlation was further corroborated by a different set of data, and it has been found that the derived polynomial equation is deemed to be a viable tool to predict hydraulic conductivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20conductivity" title="hydraulic conductivity">hydraulic conductivity</a>, <a href="https://publications.waset.org/abstracts/search?q=unconfined%20compressive%20strength" title=" unconfined compressive strength"> unconfined compressive strength</a>, <a href="https://publications.waset.org/abstracts/search?q=recycled%20plastics" title=" recycled plastics"> recycled plastics</a>, <a href="https://publications.waset.org/abstracts/search?q=recycled%20concrete%20aggregates" title=" recycled concrete aggregates"> recycled concrete aggregates</a> </p> <a href="https://publications.waset.org/abstracts/163967/hydraulic-conductivity-prediction-of-cement-stabilized-pavement-base-incorporating-recycled-plastics-and-recycled-aggregates" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/163967.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">90</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3635</span> Effects of Climate Change on Hydraulic Design Methods of Railway Infrastructures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Chiara%20Cesali">Chiara Cesali</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The effects of climate change are increasingly evident: increases in temperature (i.e. global warming), greater frequency of extreme weather events, i.e. storms, floods, which often affect transport infrastructures. Large-scale climatological models with long-term horizons (up to 2100) show the possibility of significant increases in precipitation in the future, according to the greenhouse gas emissions scenarios from IPCC. Consequently, the insufficiency of existing hydraulic works (i.e. bridges, culverts, drainage systems) may be more frequent, or those currently being designed may become insufficient in the future. Thus, the hydraulic design methods of transport infrastructure must begin to take into account the influence of climate change. To this purpose, criteria for applying to the hydraulic design of a railway infrastructure some of the approaches currently available for determining design rainfall intensity and/or peak discharge flow on the basis of possible climate change scenarios are defined and proposed in the paper. Some application cases are also described. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=climate%20change" title="climate change">climate change</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20design" title=" hydraulic design"> hydraulic design</a>, <a href="https://publications.waset.org/abstracts/search?q=precipitation" title=" precipitation"> precipitation</a>, <a href="https://publications.waset.org/abstracts/search?q=railway" title=" railway"> railway</a> </p> <a href="https://publications.waset.org/abstracts/143017/effects-of-climate-change-on-hydraulic-design-methods-of-railway-infrastructures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/143017.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">179</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3634</span> Hydraulic Resources Management under Imperfect Competition with Thermal Plants in the Wholesale Electricity Market</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Abdessalem%20Abbassi">Abdessalem Abbassi</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahlem%20Dakhlaoui"> Ahlem Dakhlaoui</a>, <a href="https://publications.waset.org/abstracts/search?q=Lota%20D.%20Tamini"> Lota D. Tamini</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, we analyze infinite discrete-time games between hydraulic and thermal power operators in the wholesale electricity market under Cournot competition. We consider a deregulated electrical industry where certain demand is satisfied by hydraulic and thermal technologies. The hydraulic operator decides the production in each season of each period that maximizes the sum of expected profits from power generation with respect to the stochastic dynamic constraint on the water stored in the dam, the environmental constraint and the non-negative output constraint. In contrast, the thermal plant is operated with quadratic cost function, with respect to the capacity production constraint and the non-negativity output constraint. We show that under imperfect competition, the hydraulic operator has a strategic storage of water in the peak season. Then, we quantify the strategic inter-annual and intra-annual water transfer and compare the numerical results. Finally, we show that the thermal operator can restrict the hydraulic output without compensation. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=asymmetric%20risk%20aversion" title="asymmetric risk aversion">asymmetric risk aversion</a>, <a href="https://publications.waset.org/abstracts/search?q=electricity%20wholesale%20market" title=" electricity wholesale market"> electricity wholesale market</a>, <a href="https://publications.waset.org/abstracts/search?q=hydropower%20dams" title=" hydropower dams"> hydropower dams</a>, <a href="https://publications.waset.org/abstracts/search?q=imperfect%20competition" title=" imperfect competition"> imperfect competition</a> </p> <a href="https://publications.waset.org/abstracts/38733/hydraulic-resources-management-under-imperfect-competition-with-thermal-plants-in-the-wholesale-electricity-market" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/38733.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">359</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3633</span> Effect of Modeling of Hydraulic Form Loss Coefficient to Break on Emergency Core Coolant Bypass </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Young%20S.%20Bang">Young S. Bang</a>, <a href="https://publications.waset.org/abstracts/search?q=Dong%20H.%20Yoon"> Dong H. Yoon</a>, <a href="https://publications.waset.org/abstracts/search?q=Seung%20H.%20Yoo"> Seung H. Yoo</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Emergency Core Coolant Bypass (ECC Bypass) has been regarded as an important phenomenon to peak cladding temperature of large-break loss-of-coolant-accidents (LBLOCA) in nuclear power plants (NPP). A modeling scheme to address the ECC Bypass phenomena and the calculation of LBLOCA using that scheme are discussed in the present paper. A hydraulic form loss coefficient (HFLC) from the reactor vessel downcomer to the broken cold leg is predicted by the computational fluid dynamics (CFD) code with a variation of the void fraction incoming from the downcomer. The maximum, mean, and minimum values of FLC are derived from the CFD results and are incorporated into the LBLOCA calculation using a system thermal-hydraulic code, MARS-KS. As a relevant parameter addressing the ECC Bypass phenomena, the FLC to the break and its range are proposed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=CFD%20analysis" title="CFD analysis">CFD analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=ECC%20bypass" title=" ECC bypass"> ECC bypass</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20form%20loss%20coefficient" title=" hydraulic form loss coefficient"> hydraulic form loss coefficient</a>, <a href="https://publications.waset.org/abstracts/search?q=system%20thermal-hydraulic%20code" title=" system thermal-hydraulic code"> system thermal-hydraulic code</a> </p> <a href="https://publications.waset.org/abstracts/89587/effect-of-modeling-of-hydraulic-form-loss-coefficient-to-break-on-emergency-core-coolant-bypass" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/89587.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">230</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3632</span> On the Free-Surface Generated by the Flow over an Obstacle in a Hydraulic Channel</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Bouhadef">M. Bouhadef</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20Bouzelha-Hammoum"> K. Bouzelha-Hammoum</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Guendouzen-Dabouz"> T. Guendouzen-Dabouz</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Younsi"> A. Younsi</a>, <a href="https://publications.waset.org/abstracts/search?q=T.%20Zitoun"> T. Zitoun</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The aim of this paper is to report the different experimental studies, conducted in the laboratory, dealing with the flow in the presence of an obstacle lying in a rectangular hydraulic channel. Both subcritical and supercritical regimes are considered. Generally, when considering the theoretical problem of the free-surface flow, in a fluid domain of finite depth, due to the presence of an obstacle, we suppose that the water is an inviscid fluid, which means that there is no sheared velocity profile, but constant upstream. In a hydraulic channel, it is impossible to satisfy this condition. Indeed, water is a viscous fluid and its velocity is null at the bottom. The two configurations are presented, i.e. a flow over an obstacle and a towed obstacle in a resting fluid. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=experiments" title="experiments">experiments</a>, <a href="https://publications.waset.org/abstracts/search?q=free-surface%20flow" title=" free-surface flow"> free-surface flow</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20channel" title=" hydraulic channel"> hydraulic channel</a>, <a href="https://publications.waset.org/abstracts/search?q=subcritical%20regime" title=" subcritical regime"> subcritical regime</a>, <a href="https://publications.waset.org/abstracts/search?q=supercritical%20flow" title=" supercritical flow"> supercritical flow</a> </p> <a href="https://publications.waset.org/abstracts/75299/on-the-free-surface-generated-by-the-flow-over-an-obstacle-in-a-hydraulic-channel" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/75299.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">307</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3631</span> The Rehabilitation Solutions for the Hydraulic Jump Sweepout: A Case Study from India</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ali%20Heidari">Ali Heidari</a>, <a href="https://publications.waset.org/abstracts/search?q=Hany%20Saleem"> Hany Saleem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The tailwater requirements are important criteria in the design of the stilling basins as energy dissipation of the spillways. The adequate tailwater level that ensures the hydraulic jump inside the basin should be fulfilled by the river's natural water level and the apron depth downstream of the chute. The requirements of the hydraulic jump should mainly be checked for the design flood, however, the drawn jump condition should not be critical in the discharges lesser than the design flood. The tailwater requirement is not met in Almatti dam, built in 2005 in India, and the jump sweep out from the basin, resulting in significant scour in the apron and end sill of the basin. This paper discusses different hydraulic solutions as sustainable solutions for the rehabilitation program. The deep apron alternative is proposed for the fewer bays of the spillway as the most cost-effective, sustainable solution. The apron level of 15 gates out of 26 gates should decrease by 5.4 m compared to the existing design to ensure a safe hydraulic jump up to the discharge of 10,000 m3/s i.e. 30% of the updated PMF. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dam" title="dam">dam</a>, <a href="https://publications.waset.org/abstracts/search?q=spillway" title=" spillway"> spillway</a>, <a href="https://publications.waset.org/abstracts/search?q=stilling%20basin" title=" stilling basin"> stilling basin</a>, <a href="https://publications.waset.org/abstracts/search?q=Almatti" title=" Almatti"> Almatti</a> </p> <a href="https://publications.waset.org/abstracts/185223/the-rehabilitation-solutions-for-the-hydraulic-jump-sweepout-a-case-study-from-india" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/185223.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">57</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3630</span> Construction of a Radial Centrifuge Pump for Agricultural Applications </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Elmo%20Thiago%20Lins%20C%C3%B6uras%20Ford">Elmo Thiago Lins Cöuras Ford</a>, <a href="https://publications.waset.org/abstracts/search?q=Valentina%20Alessandra%20Carvalho%20do%20Vale"> Valentina Alessandra Carvalho do Vale</a> </p> <p class="card-text"><strong>Abstract:</strong></p> With the evolution of the productive processes, demonstrated mainly by the presence every time larger of the irrigation and to crescent it disputes for water, accompanied by your shortage (distances every time larger), there is need to project facilities that can provide supply of water with larger speed and efficiency. Being like this, the presence of hydraulic pumps in an irrigation project or water supply for small communities, is of highest importance, and the knowledge of the fundamental parts to your good operation it deserves the due attention and care. Hydraulic pumps are machines of flow, whose function is to supply energy for the water, in order to press down her, through the conversion of mechanical energy of your originating from rotor a motor the combustion or of an electric motor. This way, the hydraulic pumps are had as generating hydraulic machines. The objective of this work was to project and to build a radial centrifugal pump for agricultural application in small communities. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=centrifuge%20pump" title="centrifuge pump">centrifuge pump</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20energy" title=" hydraulic energy"> hydraulic energy</a>, <a href="https://publications.waset.org/abstracts/search?q=agricultural%20applications" title=" agricultural applications"> agricultural applications</a>, <a href="https://publications.waset.org/abstracts/search?q=irrigation" title=" irrigation "> irrigation </a> </p> <a href="https://publications.waset.org/abstracts/18676/construction-of-a-radial-centrifuge-pump-for-agricultural-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/18676.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">371</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3629</span> Hot-Dip Galvanizing as a Corrosion Protection System for Steel Hydraulic Structures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Farrokh%20Taherkhani">Farrokh Taherkhani</a>, <a href="https://publications.waset.org/abstracts/search?q=Thomas%20Pinger"> Thomas Pinger</a>, <a href="https://publications.waset.org/abstracts/search?q=Max%20G%C3%BCndel"> Max Gündel</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Corrosion and suitable corrosion protection systems are a significant factor in the consideration of life cycle costs for steel hydraulic structures. In addition to classic coating systems (for example, epoxy resin or polyurethane), zinc and its alloys offer effective and very durable corrosion protection for steels. As a protective layer, hot-dip galvanizing prevents the corrosive media from penetrating into the steel matrix and acts as a sacrificial anode, which corrodes in preference to steel. However, hot-dip galvanizing as a corrosion protection system has not yet been approved by the relevant authority, the Federal Waterways Engineering and Research Institute (BAW) in Germany. In order to make hot-dip galvanizing usable as a corrosion protection system for steel hydraulic structures in the future, different factors must be considered. These factors are (i) corrosion protection type, (ii) resistance to mechanical stress (i.e., abrasion resistance), (iii) combinability with cathodic corrosion protection, (iv) environmental effects, and (v) the crack formation and propagation during hot-dip galvanizing. In this work, hot-dip galvanizing as a corrosion protection system for steel hydraulic steel structures, as well as open questions, are discussed. This paper is based on initial long-term exposure tests with corrosion protection systems consisting of hot-dip galvanizing and duplex systems. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=steel%20hydraulic%20structure" title="steel hydraulic structure">steel hydraulic structure</a>, <a href="https://publications.waset.org/abstracts/search?q=hot-dip%20galvanizing" title=" hot-dip galvanizing"> hot-dip galvanizing</a>, <a href="https://publications.waset.org/abstracts/search?q=corrosion%20resistance" title=" corrosion resistance"> corrosion resistance</a>, <a href="https://publications.waset.org/abstracts/search?q=zinc%20coating" title=" zinc coating"> zinc coating</a>, <a href="https://publications.waset.org/abstracts/search?q=organic%20coating%20and%20duplex%20systems" title=" organic coating and duplex systems"> organic coating and duplex systems</a> </p> <a href="https://publications.waset.org/abstracts/187712/hot-dip-galvanizing-as-a-corrosion-protection-system-for-steel-hydraulic-structures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/187712.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">43</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3628</span> Obtaining the Hydraulic Concrete Resistant to the Aggressive Environment by Using Admixtures</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=N.%20Tabatadze">N. Tabatadze</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The research aim is to study the physical and mechanical characteristics of hydraulic concrete in the surface active environment. The specific goal is to obtain high strength and low deformable concrete based on nano additives, resistant to the aggressive environment. As result of research, the alkali-silica reaction was improved (relative elongation 0,122 % of admixture instead of 0,126 % of basic concrete after 14 days). The aggressive environment impact on the strength of heavy concrete, fabricated on the basis of the hydraulic admixture with the penetrating waterproof additives also was improved (strength on compression R28=47,5 mPa of admixture instead of R28=35,8 mPa). Moreover, water absorption (W=0,59 % of admixture instead of W=1,41 %), water tightness (R14=37,9 mPa instead R14=28,7 mPa) and water-resistance (B=18 instead B=12). The basic parameters of concrete with admixture was improved in comparison with basic concrete. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20concrete" title="hydraulic concrete">hydraulic concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=alkali-silica%20reaction" title=" alkali-silica reaction"> alkali-silica reaction</a>, <a href="https://publications.waset.org/abstracts/search?q=water%20absorption" title=" water absorption"> water absorption</a>, <a href="https://publications.waset.org/abstracts/search?q=water-resistance" title=" water-resistance"> water-resistance</a> </p> <a href="https://publications.waset.org/abstracts/72475/obtaining-the-hydraulic-concrete-resistant-to-the-aggressive-environment-by-using-admixtures" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/72475.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">350</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3627</span> Calibrations and Effect of Different Operating Conditions on the Performance of a Fluid Power Control System with Servo Solenoid Valve</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tahany%20W.%20Sadak">Tahany W. Sadak</a>, <a href="https://publications.waset.org/abstracts/search?q=Fouly"> Fouly</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Anwer"> A. Anwer</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Rizk"> M. Rizk</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The current investigation presents a study on the hydraulic performance of an electro-hydraulic servo solenoid valve controlled linear piston used in hydraulic systems. Advanced methods have been used to measure and record laboratory experiments, to ensure accurate analysis and evaluation. Experiments have been conducted under different values of temperature (28, 40 and 50 °C), supply pressure (10, 20, 30, 40 and 50 bar), system stiffness (32 N/mm), and load (0.0 & 5560 N). It is concluded that increasing temperature of hydraulic oil increases the quantity of flow rate, so it achieves an increase of the quantity of flow by 5.75 % up to 48.8 % depending on operating conditions. The values of pressure decay at low temperature are less than the values at high temperature. The frequency increases with the increase of the temperature. When we connect the springs to the system, it decreases system frequency. These results are very useful in the process of packing and manufacturing of fluid products, where the properties are not affected by 50 °C, so energy and time are saved. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=electro-hydraulic%20servo%20valve" title="electro-hydraulic servo valve">electro-hydraulic servo valve</a>, <a href="https://publications.waset.org/abstracts/search?q=fluid%20power%20control%20system" title=" fluid power control system"> fluid power control system</a>, <a href="https://publications.waset.org/abstracts/search?q=system%20stiffness" title=" system stiffness"> system stiffness</a>, <a href="https://publications.waset.org/abstracts/search?q=static%20and%20dynamic%20performance" title=" static and dynamic performance"> static and dynamic performance</a> </p> <a href="https://publications.waset.org/abstracts/98470/calibrations-and-effect-of-different-operating-conditions-on-the-performance-of-a-fluid-power-control-system-with-servo-solenoid-valve" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/98470.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">155</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3626</span> Power Generation from Sewage by a Micro-Hydraulic Turbine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Tomomi%20Uchiyama">Tomomi Uchiyama</a>, <a href="https://publications.waset.org/abstracts/search?q=Tomoko%20Okayama"> Tomoko Okayama</a>, <a href="https://publications.waset.org/abstracts/search?q=Yukio%20Ide"> Yukio Ide</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study is concerned with the development of a micro-hydraulic turbine for power generation installed in sewer pipes. The runner has a circular hollow around the central (rotating) axis so that solid materials included in water can be easily flow through the runner without blocking the turbine. The laboratory experiments are also conducted. The hollow is very effective to make polyester fibers pass through the turbine. The guide vane is useful to heighten the turbine performance. But it is easily blocked by the fibers, making the turbine lose the function. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=micro-hydraulic%20turbine" title="micro-hydraulic turbine">micro-hydraulic turbine</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20generation" title=" power generation"> power generation</a>, <a href="https://publications.waset.org/abstracts/search?q=sewage" title=" sewage"> sewage</a>, <a href="https://publications.waset.org/abstracts/search?q=sewer%20pipe" title=" sewer pipe"> sewer pipe</a> </p> <a href="https://publications.waset.org/abstracts/24854/power-generation-from-sewage-by-a-micro-hydraulic-turbine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/24854.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">392</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3625</span> Engineering Thermal-Hydraulic Simulator Based on Complex Simulation Suite “Virtual Unit of Nuclear Power Plant”</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Evgeny%20Obraztsov">Evgeny Obraztsov</a>, <a href="https://publications.waset.org/abstracts/search?q=Ilya%20Kremnev"> Ilya Kremnev</a>, <a href="https://publications.waset.org/abstracts/search?q=Vitaly%20Sokolov"> Vitaly Sokolov</a>, <a href="https://publications.waset.org/abstracts/search?q=Maksim%20Gavrilov"> Maksim Gavrilov</a>, <a href="https://publications.waset.org/abstracts/search?q=Evgeny%20Tretyakov"> Evgeny Tretyakov</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20Kukhtevich"> Vladimir Kukhtevich</a>, <a href="https://publications.waset.org/abstracts/search?q=Vladimir%20Bezlepkin"> Vladimir Bezlepkin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Over the last decade, a specific set of connected software tools and calculation codes has been gradually developed. It allows simulating I&C systems, thermal-hydraulic, neutron-physical and electrical processes in elements and systems at the Unit of NPP (initially with WWER (pressurized water reactor)). In 2012 it was called a complex simulation suite “Virtual Unit of NPP” (or CSS “VEB” for short). Proper application of this complex tool should result in a complex coupled mathematical computational model. And for a specific design of NPP, it is called the Virtual Power Unit (or VPU for short). VPU can be used for comprehensive modelling of a power unit operation, checking operator's functions on a virtual main control room, and modelling complicated scenarios for normal modes and accidents. In addition, CSS “VEB” contains a combination of thermal hydraulic codes: the best-estimate (two-liquid) calculation codes KORSAR and CORTES and a homogenous calculation code TPP. So to analyze a specific technological system one can build thermal-hydraulic simulation models with different detalization levels up to a nodalization scheme with real geometry. And the result at some points is similar to the notion “engineering/testing simulator” described by the European utility requirements (EUR) for LWR nuclear power plants. The paper is dedicated to description of the tools mentioned above and an example of the application of the engineering thermal-hydraulic simulator in analysis of the boron acid concentration in the primary coolant (changed by the make-up and boron control system). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=best-estimate%20code" title="best-estimate code">best-estimate code</a>, <a href="https://publications.waset.org/abstracts/search?q=complex%20simulation%20suite" title=" complex simulation suite"> complex simulation suite</a>, <a href="https://publications.waset.org/abstracts/search?q=engineering%20simulator" title=" engineering simulator"> engineering simulator</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20plant" title=" power plant"> power plant</a>, <a href="https://publications.waset.org/abstracts/search?q=thermal%20hydraulic" title=" thermal hydraulic"> thermal hydraulic</a>, <a href="https://publications.waset.org/abstracts/search?q=VEB" title=" VEB"> VEB</a>, <a href="https://publications.waset.org/abstracts/search?q=virtual%20power%20unit" title=" virtual power unit"> virtual power unit</a> </p> <a href="https://publications.waset.org/abstracts/63791/engineering-thermal-hydraulic-simulator-based-on-complex-simulation-suite-virtual-unit-of-nuclear-power-plant" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/63791.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">380</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3624</span> Numerical Study on the Cavity-Induced Piping Failure of Embankment</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=H.%20J.%20Kim">H. J. Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=G.%20C.%20Park"> G. C. Park</a>, <a href="https://publications.waset.org/abstracts/search?q=K.%20C.%20Kim"> K. C. Kim</a>, <a href="https://publications.waset.org/abstracts/search?q=J.%20H.%20Shin"> J. H. Shin</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Cavities are frequently found beneath conduits on pile foundations in old embankments. Cavity reduces seepage length significantly and consequently causes piping failure of embankments. Case studies of embankment failures indicate that the relative settlement between ground and pile supported-concrete conduit was the main reason of the cavity. In this paper, an attempt to simulate the cavity-induced piping failure mechanism was made using finite element numerical method. Piping potential is examined by carrying out parametric study for influencing factors such as cavity length, water level, and flow conditions. The concentration of hydraulic gradient adjacent to cavity was found. It is found that the hydraulic gradient close to the cavity exceeds considerably the critical hydraulic gradient causing piping. Piping failure potential due to the existence of cavity is evaluated and contour map for the potential risk of an embankment for piping failure is proposed. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=cavity" title="cavity">cavity</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20gradient" title=" hydraulic gradient"> hydraulic gradient</a>, <a href="https://publications.waset.org/abstracts/search?q=levee" title=" levee"> levee</a>, <a href="https://publications.waset.org/abstracts/search?q=piping" title=" piping"> piping</a> </p> <a href="https://publications.waset.org/abstracts/33770/numerical-study-on-the-cavity-induced-piping-failure-of-embankment" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/33770.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">520</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3623</span> Evaluation on Mechanical Stabilities of Clay-Sand Mixtures Used as Engineered Barrier for Radioactive Waste Disposal</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ahmet%20E.%20Osmanlioglu">Ahmet E. Osmanlioglu</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this study, natural bentonite was used as natural clay material and samples were taken from the Kalecik district in Ankara. In this research, bentonite is the subject of an analysis from standpoint of assessing the basic properties of engineered barriers with respect to the buffer material. Bentonite and sand mixtures were prepared for tests. Some of clay minerals give relatively higher hydraulic conductivity and lower swelling pressure. Generally, hydraulic conductivity of these type clays is lower than <10-12 m/s. The hydraulic properties of clay-sand mixtures are evaluated to design engineered barrier specifications. Hydraulic conductivities of bentonite-sand mixture were found in the range of 1.2x10-10 to 9.3x10-10 m/s. Optimum B/S mixture ratio was determined as 35% in terms of hydraulic conductivity and mechanical stability. At the second stage of this study, all samples were compacted into cylindrical shape molds (diameter: 50 mm and length: 120 mm). The strength properties of compacted mixtures were better than the compacted bentonite. In addition, the larger content of the quartz sand in the mixture has the greater thermal conductivity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=engineered%20barriers" title="engineered barriers">engineered barriers</a>, <a href="https://publications.waset.org/abstracts/search?q=mechanical%20stability" title=" mechanical stability"> mechanical stability</a>, <a href="https://publications.waset.org/abstracts/search?q=clay" title=" clay"> clay</a>, <a href="https://publications.waset.org/abstracts/search?q=nuclear%20waste%20disposal" title=" nuclear waste disposal"> nuclear waste disposal</a> </p> <a href="https://publications.waset.org/abstracts/43160/evaluation-on-mechanical-stabilities-of-clay-sand-mixtures-used-as-engineered-barrier-for-radioactive-waste-disposal" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/43160.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">384</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3622</span> Hardware in the Loop Platform for Virtual Commissioning: Case Study of a Hydraulic-Press Model Simulated in Real-Time</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jorge%20Rodriguez-Guerra">Jorge Rodriguez-Guerra</a>, <a href="https://publications.waset.org/abstracts/search?q=Carlos%20Calleja"> Carlos Calleja</a>, <a href="https://publications.waset.org/abstracts/search?q=Aron%20Pujana"> Aron Pujana</a>, <a href="https://publications.waset.org/abstracts/search?q=Ana%20Maria%20Macarulla"> Ana Maria Macarulla</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Hydraulic-press commissioning consumes a great amount of man-hours, due to the fact that it takes place several miles away from where it has been designed. This factor became exacerbated due to control designers’ lack of knowledge about which will be the final controller gains before they start working with it. Virtual commissioning has been postulated as an optimal solution to deal with this lack of knowledge. Here, a case study is presented in which a controller is set up against a real-time model based on a hydraulic-press. The press model is designed following manufacturer specifications and it is embedded in a real-time simulator. This methodology ensures that the model achieves similar responses as the real machine that would be placed on the industry. A deterministic communication protocol is in charge of the bidirectional information transmission between the real-time model and the controller. This platform allows the engineer to test and verify the final control responses with exactly the same hardware that is going to be installed in the hydraulic-press, in other words, realize a virtual commissioning of the electro-hydraulic actuator. The Hardware in the Loop (HiL) platform validates in laboratory conditions and harmless for the machine the control algorithms designed, which allows embedding them afterwards in the industrial environment without further modifications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=deterministic%20communication%20protocol" title="deterministic communication protocol">deterministic communication protocol</a>, <a href="https://publications.waset.org/abstracts/search?q=electro-hydraulic%20actuator" title=" electro-hydraulic actuator"> electro-hydraulic actuator</a>, <a href="https://publications.waset.org/abstracts/search?q=hardware%20in%20the%20loop" title=" hardware in the loop"> hardware in the loop</a>, <a href="https://publications.waset.org/abstracts/search?q=real-time" title=" real-time"> real-time</a>, <a href="https://publications.waset.org/abstracts/search?q=virtual%20commissioning" title=" virtual commissioning"> virtual commissioning</a> </p> <a href="https://publications.waset.org/abstracts/97134/hardware-in-the-loop-platform-for-virtual-commissioning-case-study-of-a-hydraulic-press-model-simulated-in-real-time" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/97134.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">142</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3621</span> Object-Oriented Multivariate Proportional-Integral-Derivative Control of Hydraulic Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.%20Fernandez%20de%20Canete">J. Fernandez de Canete</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Fernandez-Calvo"> S. Fernandez-Calvo</a>, <a href="https://publications.waset.org/abstracts/search?q=I.%20Garc%C3%ADa-Moral"> I. García-Moral</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This paper presents and discusses the application of the object-oriented modelling software SIMSCAPE to hydraulic systems, with particular reference to multivariable proportional-integral-derivative (PID) control. As a result, a particular modelling approach of a double cylinder-piston coupled system is proposed and motivated, and the SIMULINK based PID tuning tool has also been used to select the proper controller parameters. The paper demonstrates the usefulness of the object-oriented approach when both physical modelling and control are tackled. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=object-oriented%20modeling" title="object-oriented modeling">object-oriented modeling</a>, <a href="https://publications.waset.org/abstracts/search?q=multivariable%20hydraulic%20system" title=" multivariable hydraulic system"> multivariable hydraulic system</a>, <a href="https://publications.waset.org/abstracts/search?q=multivariable%20PID%20control" title=" multivariable PID control"> multivariable PID control</a>, <a href="https://publications.waset.org/abstracts/search?q=computer%20simulation" title=" computer simulation"> computer simulation</a> </p> <a href="https://publications.waset.org/abstracts/67799/object-oriented-multivariate-proportional-integral-derivative-control-of-hydraulic-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/67799.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">349</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3620</span> Optimization for the Hydraulic Clamping System of an Internal Circulation Two-Platen Injection Molding Machine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Jian%20Wang">Jian Wang</a>, <a href="https://publications.waset.org/abstracts/search?q=Lu%20Yang"> Lu Yang</a>, <a href="https://publications.waset.org/abstracts/search?q=Jiong%20Peng"> Jiong Peng</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Internal circulation two-platen clamping system for injection molding machine (IMM) has many potential advantages on energy-saving. In order to estimate its properties, experiments in this paper were carried out. Displacement and pressure of the components were measured. In comparison, the model of hydraulic clamping system was established by using AMESim. The related parameters as well as the energy consumption could be calculated. According to the analysis, the hydraulic system was optimized in order to reduce the energy consumption. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AMESim" title="AMESim">AMESim</a>, <a href="https://publications.waset.org/abstracts/search?q=energy-saving" title=" energy-saving"> energy-saving</a>, <a href="https://publications.waset.org/abstracts/search?q=injection%20molding%20machine" title=" injection molding machine"> injection molding machine</a>, <a href="https://publications.waset.org/abstracts/search?q=internal%20circulation" title=" internal circulation"> internal circulation</a> </p> <a href="https://publications.waset.org/abstracts/35095/optimization-for-the-hydraulic-clamping-system-of-an-internal-circulation-two-platen-injection-molding-machine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/35095.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">550</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3619</span> Simulation and Analysis of Different Parameters in Hydraulic Circuit Due to Leakage</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=J.Das">J.Das</a>, <a href="https://publications.waset.org/abstracts/search?q=Gyan%20Wrat"> Gyan Wrat</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Leakage is the main gradual failure in the fluid power system, which is usually caused by the impurity in the oil and wear of matching surfaces between parts and lead to the change of the gap value. When leakage occurs in the system, the oil will flow from the high pressure chamber into the low pressure chamber through the gap, causing the reduction of system flow as well as the loss of system pressure, resulting in the decreasing of system efficiency. In the fluid power system, internal leakage may occur in various components such as gear pump, reversing valve and hydraulic cylinder, and affect the system work performance. Therefore, component leakage in the fluid power system is selected as the study to characterize the leakage and the effect of leakage on the system. Effect of leakage on system pressure and cylinder displacement can be obtained using pressure sensors and the displacement sensor. The leakage can be varied by changing the orifice using a flow control valve. Hydraulic circuit for leakage will be developed in Matlab/Simulink environment and simulations will be done by changing different parameters. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=leakage%20causes" title="leakage causes">leakage causes</a>, <a href="https://publications.waset.org/abstracts/search?q=effect" title=" effect"> effect</a>, <a href="https://publications.waset.org/abstracts/search?q=analysis" title=" analysis"> analysis</a>, <a href="https://publications.waset.org/abstracts/search?q=MATLAB%20simulation" title=" MATLAB simulation"> MATLAB simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20circuit" title=" hydraulic circuit "> hydraulic circuit </a> </p> <a href="https://publications.waset.org/abstracts/37533/simulation-and-analysis-of-different-parameters-in-hydraulic-circuit-due-to-leakage" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/37533.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">399</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3618</span> Effect of Hydraulic Diameter on Flow Boiling Instability in a Single Microtube with Vertical Upward Flow</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Qian%20You">Qian You</a>, <a href="https://publications.waset.org/abstracts/search?q=Ibrahim%20Hassan"> Ibrahim Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=Lyes%20Kadem"> Lyes Kadem</a> </p> <p class="card-text"><strong>Abstract:</strong></p> An experiment is conducted to fundamentally investigate flow oscillation characteristics in different sizes of single microtubes in vertical upward flow direction. Three microtubes have 0.889 mm, 0.533 mm, and 0.305 mm hydraulic diameters with 100 mm identical heated length. The mass flux of the working fluid FC-72 varies from 700 kg/m2•s to 1400 kg/m2•s, and the heat flux is uniformly applied on the tube surface up to 9.4 W/cm2. The subcooled inlet temperature is maintained around 24°C during the experiment. The effect of hydraulic diameter and mass flux are studied. The results showed that they have interactions on the flow oscillations occurrence and behaviors. The onset of flow instability (OFI), which is a threshold of unstable flow, usually appears in large microtube with diversified and sustained flow oscillations, while the transient point, which is the point when the flow turns from one stable state to another suddenly, is more observed in small microtube without characterized flow oscillations due to the bubble confinement. The OFI/transient point occurs early as hydraulic diameter reduces at a given mass flux. The increased mass flux can delay the OFI/transient point occurrence in large hydraulic diameter, but no significant effect in small size. Although the only transient point is observed in the smallest tube, it appears at small heat flux and is not sensitive to mass flux; hence, the smallest microtube is not recommended since increasing heat flux may cause local dryout. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flow%20boiling%20instability" title="flow boiling instability">flow boiling instability</a>, <a href="https://publications.waset.org/abstracts/search?q=hydraulic%20diameter%20effect" title=" hydraulic diameter effect"> hydraulic diameter effect</a>, <a href="https://publications.waset.org/abstracts/search?q=a%20single%20microtube" title=" a single microtube"> a single microtube</a>, <a href="https://publications.waset.org/abstracts/search?q=vertical%20upward%20flow" title=" vertical upward flow"> vertical upward flow</a> </p> <a href="https://publications.waset.org/abstracts/29887/effect-of-hydraulic-diameter-on-flow-boiling-instability-in-a-single-microtube-with-vertical-upward-flow" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/29887.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">600</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3617</span> Experiments of a Free Surface Flow in a Hydraulic Channel over an Uneven Bottom</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=M.%20Bouinoun">M. Bouinoun</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Bouhadef"> M. Bouhadef </a> </p> <p class="card-text"><strong>Abstract:</strong></p> The present study is concerned with the problem of determining the shape of the free surface flow in a hydraulic channel which has an uneven bottom. For the mathematical formulation of the problem, the fluid of the two-dimensional irrotational steady flow in water is assumed inviscid and incompressible. The solutions of the nonlinear problem are obtained by using the usual conformal mapping theory and Hilbert’s technique. An experimental study, for comparing the obtained results, has been conducted in a hydraulic channel (subcritical regime and supercritical regime). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=free-surface%20flow" title="free-surface flow">free-surface flow</a>, <a href="https://publications.waset.org/abstracts/search?q=experiments" title=" experiments"> experiments</a>, <a href="https://publications.waset.org/abstracts/search?q=numerical%20method" title=" numerical method"> numerical method</a>, <a href="https://publications.waset.org/abstracts/search?q=uneven%20bottom" title=" uneven bottom"> uneven bottom</a>, <a href="https://publications.waset.org/abstracts/search?q=supercritical%20regime" title=" supercritical regime"> supercritical regime</a>, <a href="https://publications.waset.org/abstracts/search?q=subcritical%20regime" title=" subcritical regime"> subcritical regime</a> </p> <a href="https://publications.waset.org/abstracts/34224/experiments-of-a-free-surface-flow-in-a-hydraulic-channel-over-an-uneven-bottom" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/34224.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">378</span> </span> </div> </div> <ul class="pagination"> <li class="page-item disabled"><span class="page-link">&lsaquo;</span></li> <li class="page-item active"><span class="page-link">1</span></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=hydraulic%20engineering&page=2">2</a></li> <li class="page-item"><a class="page-link" href="https://publications.waset.org/abstracts/search?q=hydraulic%20engineering&page=3">3</a></li> <li class="page-item"><a class="page-link" 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