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首页> 外文期刊>Optics and Lasers in Engineering >Temperature measurement of axisymmetric partially premixed methane/air flame in a co-annular burner using Mach-Zehnder interferometry
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Temperature measurement of axisymmetric partially premixed methane/air flame in a co-annular burner using Mach-Zehnder interferometry

机译：使用Mach-Zehnder干涉仪测量共环形燃烧器中轴对称的部分预混甲烷/空气火焰的温度

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摘要

In this paper partially premixed laminar methane/air co-flow flame is studied experimentally. Methane-air flame is established on an axisymmetric co-annular 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 characteristics for methane/air axisymmetric partially premixed flame using Mach-Zehnder interferometry. Different equivalence ratios (phi=1.4-2.2) and Reynolds numbers (Re=100-1200) are considered in the study. Flame generic visible appearance and the corresponding fringe map structures are also investigated. It is seen that the fringe maps are poorly influenced by equivalence ratio variations at constant Reynolds number but are significantly affected by Reynolds number variations in constant equivalence ratio. Temperatures obtained from optical techniques are compared with those obtained from thermocouples and good agreement is observed. It is concluded that the effect of Reynolds number increment on maximum flame temperature is negligible while equivalence ratio reduction increases maximum flame temperature substantially. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本文通过实验研究了部分预混合的层流甲烷/空气同流火焰。甲烷-空气火焰建立在轴对称的环形燃烧器上。燃料空气射流从中心管流出，而二次空气从内管和外管之间的区域流出。目的是使用Mach-Zehnder干涉仪研究甲烷/空气轴对称的部分预混火焰的火焰特性。在研究中考虑了不同的当量比（phi = 1.4-2.2）和雷诺数（Re = 100-1200）。还研究了火焰的一般可见外观和相应的条纹图结构。可以看到，在恒定雷诺数下，条纹图受等效比变化的影响很小，但是受恒定等效比下的雷诺数变化的影响很大。将通过光学技术获得的温度与通过热电偶获得的温度进行比较，并观察到良好的一致性。结论是，雷诺数增加对最高火焰温度的影响可以忽略不计，而当量比降低则使最高火焰温度显着增加。 （C）2015 Elsevier Ltd.保留所有权利。

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