高频高压电场对甲烷预混倒置焰锥火焰的影响与分析

The Phenomenon Analysis of High Frequency High Voltage Electric Field to Premixed Inverted Methane Flame

采用平面火焰燃烧器实现了一种甲烷预混倒置焰锥抬升火焰,在没有发生放电击穿的条件下着重分析了高频高压电场对火焰的影响。实验观测发现倒置焰锥火焰的抬升高度受高频高压电场的增强而降低,并且焰锥夹角随电压的增加而减小。对照实验现象分析,结果表明由于高频高压电场带来的离子风效应较小,高频高压电场对火焰面中电子或离子参与的化学反应碰撞的增强可能是最主要的原因。

In this work,a flat flame burner was used to produce a premixed inverted methane flame.The influence of high-frequency high voltage electric field on the inverted flame was investigated under the condition without discharge breakdown.Experimental observations found that inverted flame lifting height became lower by increasing voltage of the applied high frequency electric field,and the flame cone angle simultaneously decreased.An experimental analysis show that the ion-wind effect of high frequency high voltage electric field on the flame could be insignificant and may not lead to the phenomenon observed in the experiment.The electron and ion collision mechanism involved in the chemical reaction of the combustion may be the main reason of the flame enhancement under high frequency high voltage electric field.