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<!DOCTYPE html> <html lang="en" dir="ltr"> <head>  <script async src="https://www.googletagmanager.com/gtag/js?id=G-P63WKM1TM1"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-P63WKM1TM1'); </script>  <script type="text/javascript" > (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)}; m[i].l=1*new Date(); for (var j = 0; j < document.scripts.length; j++) {if (document.scripts[j].src === r) { return; }} k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)}) (window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym"); ym(55165297, "init", { clickmap:false, trackLinks:true, accurateTrackBounce:true, webvisor:false }); </script> <noscript><div><img src="https://mc.yandex.ru/watch/55165297" style="position:absolute; left:-9999px;" alt="" /></div></noscript>    <title>Hydrodynamic Characterisation of a Hydraulic Flume with Sheared Flow</title> <meta name="description" content="Hydrodynamic Characterisation of a Hydraulic Flume with Sheared Flow"> <meta name="keywords" content="Acoustic Doppler velocimetry, experimental hydrodynamics, open-channel flow, shear profiles, tidal stream turbines."> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <meta name="citation_title" content="Hydrodynamic Characterisation of a Hydraulic Flume with Sheared Flow"> <meta name="citation_author" content="Daniel Rowe"> <meta name="citation_author" content="Christopher R. Vogel"> <meta name="citation_author" content="Richard H. J. Willden"> <meta name="citation_publication_date" content="2024/09/11"> <meta name="citation_journal_title" content="International Journal of Mechanical and Mechatronics Engineering"> <meta name="citation_volume" content="18"> <meta name="citation_issue" content="9"> <meta name="citation_firstpage" content="247"> <meta name="citation_lastpage" content="256"> <meta name="citation_pdf_url" content="https://publications.waset.org/10013813/pdf"> <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 d-lg-none navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="" name="q" aria-label="Search"> <button class="btn btn-light my-2 my-sm-0" type="submit"><i class="fas fa-search"></i></button> </form> </div> <div class="collapse navbar-collapse mt-1" id="navbarMenu"> <ul class="navbar-nav ml-auto align-items-center" id="mainNavMenu"> <li class="nav-item"> <a class="nav-link" href="https://waset.org/conferences" title="Conferences in 2024/2025/2026">Conferences</a> </li> <li class="nav-item"> <a class="nav-link" href="https://waset.org/disciplines" title="Disciplines">Disciplines</a> </li> <li class="nav-item"> <a class="nav-link" href="https://waset.org/committees" rel="nofollow">Committees</a> </li> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" href="#" id="navbarDropdownPublications" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> Publications </a> <div class="dropdown-menu" aria-labelledby="navbarDropdownPublications"> <a class="dropdown-item" href="https://publications.waset.org/abstracts">Abstracts</a> <a class="dropdown-item" href="https://publications.waset.org">Periodicals</a> <a class="dropdown-item" href="https://publications.waset.org/archive">Archive</a> </div> </li> <li class="nav-item"> <a class="nav-link" href="https://waset.org/page/support" title="Support">Support</a> </li> </ul> </div> </div> </nav> </div> </header> <main> <div class="container mt-4"> <div class="row"> <div class="col-md-9 mx-auto"> <form method="get" action="https://publications.waset.org/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=""> <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> 33093</div> </div> </div> </div> <div class="card publication-listing mt-3 mb-3"> <h5 class="card-header" style="font-size:.9rem">Hydrodynamic Characterisation of a Hydraulic Flume with Sheared Flow</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/search?q=Daniel%20Rowe">Daniel Rowe</a>, <a href="https://publications.waset.org/search?q=Christopher%20R.%20Vogel"> Christopher R. Vogel</a>, <a href="https://publications.waset.org/search?q=Richard%20H.%20J.%20Willden"> Richard H. J. Willden</a> </p> <p class="card-text"><strong>Abstract:</strong></p> <p>This study documents the hydrodynamic characteristics of a recirculating water flume in preparation for experimental testing of horizontal axis tidal stream turbine models. An Acoustic Doppler Velocimeter (ADV) was used to measure the flow at high temporal resolution at various locations throughout the flume, enabling the spatial uniformity and turbulence flow parameters to be investigated. The mean velocity profiles exhibited high levels of spatial uniformity at the design speed of the flume, 0.6 ms−1, with variations in the three-dimensional velocity components on the order of ±1% at the 95% confidence level, along with a modest streamwise acceleration through the measurement domain, a target 5m working section of the flume. A high degree of uniformity was also apparent for the turbulence intensity, with values ranging between 1-2% across the intended swept area of the turbine rotor. The integral scales of turbulence exhibited a far higher degree of variation throughout the water column, particularly in the streamwise and vertical scales. This behaviour is believed to be due to the high signal noise content leading to decorrelation in the sampling records. To achieve more realistic levels of vertical velocity shear in the flume, a simple procedure to practically generate target vertical shear profiles in open-channel flows is described. Here, we arranged a series of non-uniformly spaced parallel bars placed across the width of the flume and normal to the onset flow. By adjusting the resistance grading across the height of the working section, the downstream profiles could be modified accordingly, characterised by changes in the velocity profile power-law exponent, 1/n. Considering the significant temporal variation in a tidal channel, the choice of the exponent denominator, n = 6 and n = 9, effectively provides an achievable range around the much-cited value of n = 7 observed at many tidal sites. The resulting flow profiles, which we intend to use in future turbine tests, have been characterised in detail. The results indicate non-uniform vertical shear across the survey area and reveal substantial corner flows, arising from the differential shear between the target vertical and cross-stream shear profiles throughout the measurement domain. In vertically sheared flow, the rotor-equivalent turbulence intensity ranges between 3.0-3.8% throughout the measurement domain for both bar arrangements, while the streamwise integral length scale grows from a characteristic dimension on the order of the bar width, similar to the flow downstream of a turbulence-generating grid. The experimental tests are well-defined and repeatable and serve as a reference for other researchers who wish to undertake similar investigations.</p> <iframe src="https://publications.waset.org/10013813.pdf" style="width:100%; height:400px;" frameborder="0"></iframe> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/search?q=Acoustic%20Doppler%20velocimetry" title="Acoustic Doppler velocimetry">Acoustic Doppler velocimetry</a>, <a href="https://publications.waset.org/search?q=experimental%20hydrodynamics" title=" experimental hydrodynamics"> experimental hydrodynamics</a>, <a href="https://publications.waset.org/search?q=open-channel%20flow" title=" open-channel flow"> open-channel flow</a>, <a href="https://publications.waset.org/search?q=shear%20profiles" title=" shear profiles"> shear profiles</a>, <a href="https://publications.waset.org/search?q=tidal%20stream%20turbines." title=" tidal stream turbines."> tidal stream turbines.</a> </p> <a href="https://publications.waset.org/10013813/hydrodynamic-characterisation-of-a-hydraulic-flume-with-sheared-flow" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/10013813/apa" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">APA</a> <a href="https://publications.waset.org/10013813/bibtex" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">BibTeX</a> <a href="https://publications.waset.org/10013813/chicago" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Chicago</a> <a href="https://publications.waset.org/10013813/endnote" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">EndNote</a> <a href="https://publications.waset.org/10013813/harvard" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">Harvard</a> <a href="https://publications.waset.org/10013813/json" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">JSON</a> <a href="https://publications.waset.org/10013813/mla" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">MLA</a> <a href="https://publications.waset.org/10013813/ris" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">RIS</a> <a href="https://publications.waset.org/10013813/xml" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">XML</a> <a href="https://publications.waset.org/10013813/iso690" target="_blank" rel="nofollow" class="btn btn-primary btn-sm">ISO 690</a> <a href="https://publications.waset.org/10013813.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">75</span> </span> <p class="card-text"><strong>References:</strong></p> <br>[1] D. Coles, A. Angeloudis, D. Greaves, G. Hastie, M. Lewis, L. Mackie, J. McNaughton, J. Miles, S. P. Neill, M. D. Piggott, D. Risch, B. Scott, C. Spalding, T. Stallard, P. Thies, S. Walker, D. White, R. H. J. Willden, and B. Williamson, “A review of the UK and British Channel Islands practical tidal stream resource,” Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 477, no. 2255, 2021. <br>[2] D. R. Noble, S. Draycott, S. Ordonez Sanchez, K. Porter, C. Johnstone, S. Finch, F. Judge, C. Desmond, B. Santos Varela, J. Lopez Mendia, D. Darbinyan, F. Khalid, L. Johanning, M. Le Boulluec, and A. Schaap, “Test recommendations and gap analysis report,” MaRINET2, Technical Report, 2018. <br>[3] J. Park, J. M. Cutbirth, and W. H. Brewer, “Hydrodynamic performance of the large cavitation channel (LCC),” in Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference, Vol. 2: Symposia, Parts A, B, and C, Hawaii, USA, 2003, pp. 87–100. <br>[4] T. Mori, K. Naganuma, R. Kimoto, R. Yakushiji, and S. Nagaya, “Hydrodynamic and hydroacoustic characteristics of the flow noise simulator,” in Proceedings of the ASME/JSME 2007 5th Joint Fluids Engineering Conference, Vol. 2, California, USA, 2007, pp. 121–127. <br>[5] D. R. J. Sutherland, D. R. Noble, J. Steynor, T. Davey, and T. Bruce, “Characterisation of current and turbulence in the FloWave Ocean Energy Research Facility,” Ocean Engineering, vol. 139, pp. 103–115, 2017. <br>[6] P. R. Owen and H. K. Zienkiewicz, “The production of uniform shear flow in a wind tunnel,” Journal of Fluid Mechanics, vol. 2, no. 6, p. 521–531, 1957. <br>[7] J. W. Elder, “Steady flow through non-uniform gauzes of arbitrary shape,” Journal of Fluid Mechanics, vol. 5, pp. 355 – 368, 1959. <br>[8] M. Islam, D. Spencer, P. Herrington, D. Walker, H. Moideen, and Y. C. Park, “Sheared current generation in flume tank for experimental research,” in Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering, vol. 1, Nantes, France, 2013, pp. 1–12. <br>[9] A. Vinod, C. Han, and A. Banerjee, “Tidal turbine performance and near-wake characteristics in a sheared turbulent inflow,” Renewable Energy, vol. 175, pp. 840–852, 2021. <br>[10] A. Robert, A. G. Roy, and B De Serres, “Changes in velocity profiles at roughness transitions in coarse grained channels,” Sedimentology, vol. 39, pp. 725–735, 1992. <br>[11] D. Rowe, C. R. Vogel, and R. H. J. Willden, “Experimental methodology for hydrodynamic characterisation of a hydraulic flume,” 2023, unpublished Manuscript. <br>[12] J. McNaughton, S. Ettema, F. Zilic de Arcos, C. R. Vogel, and R. H. J. Willden, “An experimental investigation of the influence of inter-turbine spacing on the loads and performance of a co-planar tidal turbine fence,” Journal of Fluids and Structures, vol. 118, p. 103844, 2023. <br>[13] Nortek, “The comprehensive manual for velocimeters,” Manual, Norway, 2018, accessed: 2021-07-10. Online. Available: https:// support.nortekgroup.com/hc/en-us/article attachments/4551609336220 <br>[14] H. W. Coleman and W. Glenn Steele Jr., Experimentation, Validation, and Uncertainty Analysis for Engineers. United States of America: John Wiley & Sons, Inc., 2009. <br>[15] D. G. Goring and V. I. Nikora, “Despiking acoustic Doppler velocimeter data,” Journal of Hydraulic Engineering, vol. 128, no. 1, pp. 117–126, 2002. <br>[16] T. L. Wahl, “Discussion of “Despiking acoustic Doppler velocimeter data” by Derek G. Goring and Vladimir I. Nikora,” Journal of Hydraulic Engineering, vol. 129, no. 6, pp. 484–487, 2003. <br>[17] I. Nezu and H. Nakagawa, Turbulence in Open-Channel Flows. Netherlands: A.A. Balkema, 1993. <br>[18] L. H. Benedict and R. D. Gould, “Towards better uncertainty estimates for turbulence statistics,” Experiments in Fluids, vol. 22, pp. 129–136, 1996. Online. Available: https://doi.org/10.1007/s003480050030 <br>[19] G. Voulgaris and J. H. Trowbridge, “Evaluation of the acoustic Doppler velocimeter (ADV) for turbulence measurements,” Journal of Atmospheric and Oceanic Technology, vol. 15, pp. 272–289, 1998. <br>[20] F. de Castro, “fitmethis version 1.6.1,” 2021, retrieved: 2023-06-06. Online. Available: https://uk.mathworks.com/ matlabcentral/fileexchange/40167-fitmethis <br>[21] R. V. Hogg, J. W. McKean, and A. T. Craig, Introduction to Mathematical Statistics. United States of America: Prentice Hall, 2005. <br>[22] K. Christakos, J. Reuder, and B. Furevik, “Experimental characterization of the marine atmospheric boundary layer in the Havsul area, Norway,” Energy Procedia, vol. 35, pp. 121–127, 2013, deepWind’2013 – Selected papers from 10th Deep Sea Offshore Wind R&D Conference, Trondheim, Norway. <br>[23] O. P. Folorunso, “Probability distribution of turbulent velocity fluctuations in a patchy vegetated open channel,” Journal of Civil & Environmental Engineering, vol. 7, 2017. <br>[24] M. Z. Raqab, S. A. Al-Awadhi, and D. Kundu, “Discriminating among Weibull, log-normal, and log-logistic distributions,” Communications in Statistics - Simulation and Computation, vol. 47, no. 5, pp. 1397–1419, 2018. <br>[25] P. Hanmaiahgari, V. Roussinova, and R. Balachandar, “Turbulence characteristics of flow in an open channel with temporally varying mobile bedforms,” Journal of Hydrology and Hydromechanics, vol. 65, 2017. <br>[26] O. Reynolds, “IV. On the dynamical theory of incompressible viscous fluids and the determination of the criterion,” Philosophical Transactions of the Royal Society of London. (A.), vol. 186, pp. 123–164, 1895. <br>[27] S. Pope, Turbulent Flows. United States of America: Cambridge University Press, 2014. <br>[28] I. A. Milne, R. N. Sharma, and R. G. J. Flay, “The structure of turbulence in a rapid tidal flow,” Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol. 473, 2017. <br>[29] M. Togneri and I. Masters, “Comparison of marine turbulence characteristics for some potential turbine installation sites,” in Proceedings of the 4th Internation Conference on Ocean Energy, Dublin, Ireland, 2012. <br>[30] M. Thi´ebaut, J.-F. Filipot, C. Maisondieu, D. Guillaume, C. Jochum, L. Kilcher, and G. Sylvain, “Characterization of the vertical evolution of the three-dimensional turbulence for fatigue design of tidal turbines,” Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences, vol. 378, p. 20190495, 2020. <br>[31] R. K. Walter, N. J. Nidzieko, and S. G. Monismith, “Similarity scaling of turbulence spectra and cospectra in a shallow tidal flow,” Journal of Geophysical Research: Oceans, vol. 116, no. C10, 2011. <br>[32] P. L. O’Neill, D. Nicolaides, D. R. Honnery, and J. Soria, “Autocorrelation functions and the determination of integral length with reference to experimental and numerical data,” in Proceedings of the 15th Australasian Fluid Mechanics Conference, Sydney, Australia, 2004. <br>[33] A. N. Kolmogorov, “The local structure of turbulence in incompressible viscous fluid for very large Reynolds numbers,” Proceedings: Mathematical and Physical Sciences, vol. 434, no. 1890, pp. 9–13, 1991. <br>[34] M. Lewis, S. P. Neill, P. Robins, M. R. Hashemi, and S. Ward, “Characteristics of the velocity profile at tidal-stream energy sites,” Renewable Energy, vol. 114, pp. 258–272, 2017. <br>[35] C. F. Cowdrey, “A simple method for the design of wind-tunnel velocity-profile grids,” National Physical Laboratory, Teddington, UK, Tech. Rep. Aero Note 1055, 1967. <br>[36] P. E. Roach, “The generation of nearly isotropic turbulence by means of grids,” International Journal of Heat and Fluid Flow, vol. 8, no. 2, pp. 82–92, 1987. </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational anniversary</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Account <li><a href="https://waset.org/profile">My Account</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Explore <li><a href="https://waset.org/disciplines">Disciplines</a></li> <li><a href="https://waset.org/conferences">Conferences</a></li> <li><a href="https://waset.org/conference-programs">Conference Program</a></li> <li><a href="https://waset.org/committees">Committees</a></li> <li><a href="https://publications.waset.org">Publications</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Research <li><a href="https://publications.waset.org/abstracts">Abstracts</a></li> <li><a href="https://publications.waset.org">Periodicals</a></li> <li><a href="https://publications.waset.org/archive">Archive</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Open Science <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Open-Science-Philosophy.pdf">Open Science Philosophy</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Open-Science-Award.pdf">Open Science Award</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Open-Society-Open-Science-and-Open-Innovation.pdf">Open Innovation</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Postdoctoral-Fellowship-Award.pdf">Postdoctoral Fellowship Award</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/Scholarly-Research-Review.pdf">Scholarly Research Review</a></li> </ul> </div> <div class="col-md-2"> <ul class="list-unstyled"> Support <li><a href="https://waset.org/page/support">Support</a></li> <li><a href="https://waset.org/profile/messages/create">Contact Us</a></li> <li><a href="https://waset.org/profile/messages/create">Report Abuse</a></li> </ul> </div> </div> </div> </div> </div> <div class="container text-center"> <hr style="margin-top:0;margin-bottom:.3rem;"> <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" class="text-muted small">Creative Commons Attribution 4.0 International License</a> <div id="copy" class="mt-2">© 2024 World Academy of Science, Engineering and Technology</div> </div> </footer> <a href="javascript:" id="return-to-top"><i class="fas fa-arrow-up"></i></a> <div class="modal" id="modal-template"> <div class="modal-dialog"> <div class="modal-content"> <div class="row m-0 mt-1"> <div class="col-md-12"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> </div> </div> <div class="modal-body"></div> </div> </div> </div> <script src="https://cdn.waset.org/static/plugins/jquery-3.3.1.min.js"></script> <script src="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/js/bootstrap.bundle.min.js"></script> <script src="https://cdn.waset.org/static/js/site.js?v=150220211556"></script> <script> jQuery(document).ready(function() { /*jQuery.get("https://publications.waset.org/xhr/user-menu", function (response) { jQuery('#mainNavMenu').append(response); });*/ jQuery.get({ url: "https://publications.waset.org/xhr/user-menu", cache: false }).then(function(response){ jQuery('#mainNavMenu').append(response); }); }); </script> </body> </html>