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在 Sanders和 Borghi工作的基础上 ,推导出考虑化学反应的标量耗散率和标量时间尺度 ,在标量的联合概率密度函数方程的小尺度混合模型中采用考虑化学反应的标量的时间尺度 ,结合求解流场的 k- ε模型对甲烷轴对称射流扩散火焰进行了计算 ,最后分析了标量时间尺度对小尺度混合模型 (IEM模型 )和计算结果的影响。
Based on the work of Sanders and Borghi, we deduced the scalar dissipation rate and scalar time scale considering the chemical reaction, and adopted the time scale of scalar considering the chemical reaction in the small-scale mixed model of scalar joint probability density function equation, The k-ε model of the flow field is used to calculate the symmetry jet diffusion flame of methane. Finally, the influence of scalar time scale on the small-scale mixed model (IEM model) and the calculation results is analyzed.