Structure and extinction characteristics of premixed micro flames

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作者：

Guangzhou Institute of Energy Conversion, Guangzhou 510640, China ^{[1
]}

不详 ^{[2
]}

不详 ^{[3
]}

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来源：

Kung Cheng Je Wu Li Hsueh Pao | 2006年 / 4卷 / 711-713期

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摘要：

Structure and extinction characteristic of circular jet methane-air premixed micro-flames in room-temperature air are investigated experimentally and numerically. When the characteristic size reduces, it is easy to extinct, and the minimal equivalence ratio φu increases, moreover, all the equivalence ratio should be more than 1(φ > 1) in order to obtain the stable flames. When the equivalence ratio is lager (φ = 10), Calculation results show that, the flame structure is composed of two parts, the inside part is premixed flame and the outside part is diffusion flame. These calculation results give the reason why the premixed flame is stable at high equivalence ratio with smaller characteristic size in the experiment.

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