离子电流法研究电场助燃的可行性分析

Feasibility Analysis of Investigation on Effects of Electric Fields on Combustion Using Ion Current Method

在定容燃烧弹内,运用离子电流法,测量了不同加载电压(0^-5,k V)下的甲烷空气预混燃烧产生的离子电流,应用离子电流信号的特征参数分析了电场对甲烷/空气燃烧的影响,并与"光学法"和压力法分析的结果进行了对比.三者获得了一致的结论,电场对燃烧的促进效果随加载电压的增大而增强,且稀燃情况促进效果最明显,其次是浓燃、当量比燃烧.且离子电流法和压力法的对应特征参数的二次拟合相关系数在0.95以上.上述结果可为离子电流法研究电场辅助燃烧的可行性提供理论依据.

The ion current method was used to analyse the effects of electric fields on methane/air combustion in a constant volume bomb.The ion current as a characteristic parameter was obtained under different applied voltage（0—-5,kV）.Combustion pressure was regarded as another characteristic parameter.The two parameters were used to analyse the effects of electric fields on methane/air combustion.The results acquired by the two methods and optical method are exactly the same.The effects of electric fields on combustion increase with the increase in the applied voltage;the effects under lean combustion conditions are most obvious,followed by rich combustion,and equiva-lent ratio combustion.And the correlation coefficient of the two characteristic parameters is above 0.95.The above results can provide a theoretical base for the ion current method in studing the effects of electric fields on combus-tion.Moreover,this method is simple and highly accurate.