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本文采用k-ε模型和求解标量的联合概率密度函数输运方程相结合的方法，利用文献[1]提出的简化NOx生成机理，对甲烷湍流射流扩散火焰中NOx的排放量进行了计算。计算结果表明，采用这一方法对污染物排放进行数值模拟是行之有效的，很有发展潜力。
In this paper, we combine the k-ε model and the joint probability density function transport equation to solve the scalar, and use the simplified NOx generation mechanism proposed in [1] to calculate the NOx emission in the methane turbulent jet diffusion flame. The calculation results show that the numerical simulation of pollutant discharge using this method is effective and has great potential for development.