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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >An Experimental Study on the Local Configuration of Premixed Turbulent Flame
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An Experimental Study on the Local Configuration of Premixed Turbulent Flame

机译:预混湍流火焰局部形态的实验研究

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In our previous works, the mean local burning velocity turned out to be changed from the original laminar burning velocity due to the preferential diffusion effect and it was found to be an important factor as dominating the turbulent burning velocity. In the present study, an attempt is made to investigate directly the local propagation characteristics of methane and propane premixed turbulent flames in the wrinkled laminar flame region. A laser tomography technique is used to obtain the local flame configuration and movement, and quantitative analyses are performed. As a result, the estimated local flame displacement velocities are found to be distributed over a wide range and to be dependent on the local curvature of the turbulent flame. In addition, its mean value of the methane mixture has a tendency to become larger as decreasing its equivalence ratio, whereas that of the propane mixture becomes smaller.
机译:在我们以前的工作中,由于优先扩散效应,平均局部燃烧速度被证明与原始层流燃烧速度有所不同,并且发现它是决定湍流燃烧速度的重要因素。在本研究中,试图直接研究甲烷和丙烷预混湍流火焰在褶皱层流火焰区域的局部传播特性。使用激光断层扫描技术获取局部火焰的形状和运动,并进行定量分析。结果,发现估计的局部火焰位移速度分布在很宽的范围内,并且取决于湍流火焰的局部曲率。另外,当降低其当量比时,甲烷混合物的平均值具有趋于增大的趋势,而当丙烷混合物时,其平均值趋于较小。

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