甲烷/空气湍流射流扩散火焰的化学动力学模拟

利用几率密度函数方法求解标量场及用统计矩方法求解流场相结合的手段，对甲烷／空气湍流射流扩散火焰结构进行了计算模拟，其中，考虑了从简化到详细的三种不同规模的甲烷氧化反应动力学机理．计算结果与已有的实验结果进行了比较和分析，表明该模型可以很好地预测流场变化．在预测主要组分和温度时，三种机理具有相同的效果，在预测小浓度组分时，详细机理具有更好的效果．此外，简化机理能够极大地缩短计算时间，因而在工程应用中有着巨大的潜力．

Chemical Kinetical Modeling of Turbulent Jet Diffusion Flame for Methane/Air

The probability density function method coupled with the statistical moment method is used to predict the turbulent jet diffusion flame structure of methane/air. Three different chemical kinetical schemes for methane oxidation ranging from detailed mechanism to reduced mechanism are used. The computational results are compared with the experimental results. The results show that the modeling can well predict the flow field. The results also show that the three mechanisms have the same function for predicting reactants, products and temperature, the detailed mechanism has a better function in predicting intermediates, while the reduced mechanism can shorten the CPU time largely and is of significance in engineering practice.