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采用N-S方程添加体积力源项的方法,使用FLUENT来模拟匀强电场对甲烷-空气球形传播火焰的拉伸影响,计算了过量空气系数1.6,体积力分别为12300 N/cm~3、30750 N/cm~3、123000 N/cm~3情况下的火焰拉伸情况。结果表明,体积力选取较小值时数值结果与实验结果较为近似,偏大时则结果差别较大,通过对数值结果的分析发现,火焰锋面粒子迁移导致的浓度分布不均和涡流是导致球形传播火焰发生形变的主要原因。
The influence of uniform electric field on the stretching of methane-air spheroidal propagation flame was simulated by using FLUENT method with the method of NS equation adding bulk force source. The excess air coefficient was 1.6, and the bulk forces were 12300 N / cm ~ 3 and 30750 N respectively / cm ~ 3, 123000 N / cm ~ 3 case of flame stretching. The results show that the numerical results are similar to the experimental ones when the value of the body force is smaller and the results are different when the body force is smaller. Based on the analysis of the numerical results, it is found that the uneven distribution of the particles due to the particle front and the eddy current Propagation of flame propagation deformation of the main reasons.