Experimental Investigation of Partially Premixed Laminar Methane/Air Co-Flow Flames Using Mach-Zehnder Interferometry

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Partially Premixed Laminar Methane/Air Co-Flow Flames Using Mach-Zehnder Interferometry</title> <meta name="description" content="Experimental Investigation of Partially Premixed Laminar Methane/Air Co-Flow Flames Using Mach-Zehnder Interferometry"> <meta name="keywords" content="flame structure, Mach-Zehnder interferometry, partially premixed flame, temperature field "> <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 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87358</div> </div> </div> </div> <div class="card publication-listing mt-3 mb-3"> <h5 class="card-header" style="font-size:.9rem">Experimental Investigation of Partially Premixed Laminar Methane/Air Co-Flow Flames Using Mach-Zehnder Interferometry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Misagh%20Irandoost%20Shahrestani">Misagh Irandoost Shahrestani</a>, <a href="https://publications.waset.org/abstracts/search?q=Mehdi%20Ashjaee"> Mehdi Ashjaee</a>, <a href="https://publications.waset.org/abstracts/search?q=Shahrokh%20Zandieh%20Vakili"> Shahrokh Zandieh Vakili</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In this paper, partially premixed laminar methane/air co-flow flame is studied experimentally. Methane-air flame was established on an axisymmetric coannular burner. The fuel-air jet flows from the central tube while the secondary air flows from the region between the inner and the outer tube. The aim is to investigate the flame features and to develop a nonintrusive method for temperature measurement of methane/air partially premixed flame using Mach-Zehnder interferometry method. Different equivalence ratios and Reynolds numbers are considered. Flame generic visible appearance was also investigated and its various structures were studied. Three distinguished flame regimes were seen based on its appearance. A double flame structure can be seen for the equivalence ratio in the range of 1<Φ<2.1. By adding air to the mixture up to Φ=4 the flame has the characteristics of both premixed and non-premixed flames. Finally for 4<Φ<∞ the flame mainly becomes non-premixed like and the luminous sooting region on its tip is the obvious feature of this type of flames. The Mach-Zehnder method is used to obtain temperature field of a transparent fluid by means of index of refraction. Temperature obtained from optical techniques was compared with that of obtained from thermocouples in order to validate the results. Good agreement was observed for these two methods. <iframe src="https://publications.waset.org/abstracts/17291.pdf" style="width:100%; height:400px;" frameborder="0"></iframe> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=flame%20structure" title="flame structure">flame structure</a>, <a href="https://publications.waset.org/abstracts/search?q=Mach-Zehnder%20interferometry" title=" Mach-Zehnder interferometry"> Mach-Zehnder interferometry</a>, <a href="https://publications.waset.org/abstracts/search?q=partially%20premixed%20flame" title=" partially premixed flame"> partially premixed flame</a>, <a href="https://publications.waset.org/abstracts/search?q=temperature%20field" title=" temperature field "> temperature field </a> </p> <a href="https://publications.waset.org/abstracts/17291/experimental-investigation-of-partially-premixed-laminar-methaneair-co-flow-flames-using-mach-zehnder-interferometry" class="btn btn-primary 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Experimental Investigation of Partially Premixed Laminar Methane/Air Co-Flow Flames Using Mach-Zehnder Interferometry