为了比较正/负电场的助燃效果
在室温298K、气压100kPa条件下
通过对定容燃烧弹内的网状电极分别加载正直流电压和负直流电压
研究了正/负电场助燃机理
由此分析了2种电压对甲烷/空气预混火焰形状、火焰传播速度以及燃烧压力等参数的影响。结果显示:正/负直流电场对过量空气系数分别为1.2、1.6的预混稀燃火焰均有促进作用
平均火焰传播速度在施加电压的电极方向得到增强;在施加电场后
相同过量空气系数下的火焰燃烧峰值压力增大
且随着电压幅值绝对值的增大
峰值压力到达时间相应缩短;在相同的电压幅值下
正电场的促进效果优于负电场。该结果对电场辅助燃烧的进一步研究具有指导意义。
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