Abstract: The standard form of the k ε turbulence model was utilized.Numerical simulations were performed for the turbulent flow and mixing of two coaxial isothermal or non isothermal jets in a diverging duct with adverse pressure gradient. The calculated distributions of the time averaged gas velocity and temperature were compared with the measured test data.

Key words: Turbulent model;Turbulent mixing;Channel flow;Numerical simulation

摘要： 应用标准形式的ｋ－ε湍流模型，对具有逆向压力梯度的渐扩通道内两股等温或不等温射流的湍流流动与混合进行了数值模拟。结果表明，时均速度场与温度场的计算结果与实验测量数据相符合。

关键词: 湍流模型;湍流混合;管道流;数值仿真