在无结构网格中,对轴对称钝体驻定的湍流扩散火焰进行数值模拟.采用有限容积(FV) MonteCarlo(MC)混合算法求解湍流燃烧问题的混合算法.MonteCarlo法求解脉动速度 标量 频率的联合概率密度函数方程,有限容积法求解平均质量、动量和能量方程.求解的两组方程是相容的,合理的耦合方式可以减少统计偏差,计算精度和效率显著优于单独的颗粒方法.文中对化学反应采用层流火焰面模型,并将数值计算结果与实验结果作了比较和分析. In unstructured grids, a turbulent diffusion flame with axisymmetric bluff body is simulated numerically.The hybrid algorithm of turbulent combustion is solved by finite volume (FV) Monte Carlo (MC) hybrid algorithm.The Monte Carlo method is used to solve the turbulent diffusion flame Joint probability density function equation and finite volume method to solve the average mass, momentum and energy equations.The two equations solved are compatible and reasonable coupling method can reduce the statistical deviation, the calculation accuracy and efficiency are significantly better than the single particle method. The laminar flame model was used for the chemical reactions, and the numerical results and experimental results were compared and analyzed.