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首页> 外文期刊>Combustion Science and Technology >INVESTIGATIONS ON THE FLAME LET INNER STRUCTURE OF TURBULENT PREMIXED FLAMES
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INVESTIGATIONS ON THE FLAME LET INNER STRUCTURE OF TURBULENT PREMIXED FLAMES

机译：湍流预混合火焰的火焰内部结构研究

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摘要

Planar Rayleigh scattering measurements were used to investigate the inner structure of flamelets in premixed turbulent Bunsen flames. Measurements were performed in a high pressure chamber, where pressure is varied from 0.3 to 0.9 MPa. Two lean equivalence ratios (0.6 and 0.7) of methane /air mixtures were studied. Local information regarding the thickness and the local curvature of the flamelets were obtained. It is observed that an increase of the equivalence ratio induces a decrease of the mean local flamelet thickness. When pressure is increased from 0.3 to 0.9 MPa, the mean flamelet thickness does not decrease as for laminar case. The different external phenomena (turbulence and stretch (curvature and strain rate)) which could explain this trend are investigated.
机译：平面瑞利散射测量用于研究预混湍流本生火焰中小火焰的内部结构。在高压室中进行测量，压力在0.3到0.9 MPa之间变化。研究了甲烷/空气混合物的两种稀薄当量比（0.6和0.7）。获得关于小火焰的厚度和局部曲率的局部信息。观察到，当量比的增加引起平均局部小火焰厚度的减小。当压力从0.3 MPa增加到0.9 MPa时，平均小火焰厚度不会像层流情况一样减小。研究了可以解释这种趋势的不同外部现象（湍流和拉伸（曲率和应变率））。

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