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模拟了预混乙炔-空气绝热火焰在平板狭缝中的传播,针对平面点火和火花点火对火焰形状的影响进行了重点讨论。计算结果显示,采用平面点火时,火焰在较小的狭缝通道中会形成蘑菇形状,而在较大的狭缝通道中会形成郁金香形状。而采用火花点火时,在两种通道条件下,火焰都倾向于形成蘑菇形状。根据计算结果可知,采用平面点火方式有利于郁金香状火焰的形成,而在火花点火条件下,更倾向于形成蘑菇状火焰。此结论对郁金香状火焰形成机理研究是必要的补充。
The propagation of pre-mixed acetylene-air adiabatic flame in slab slot was simulated. The effects of flare and spark on the flame shape were discussed. The calculated results show that the flame forms a mushroom shape in the smaller slit channel and the tulip shape in the larger slit channel. With spark ignition, the flame tends to form a mushroom shape under both channel conditions. According to the calculation results, it can be seen that the flat ignition method is beneficial to the formation of a tulip-shaped flame, while under the spark ignition condition, the mushroom-shaped flame is more likely to form. This conclusion is a necessary supplement to the study of tulip-like flame formation mechanism.