复杂剪切湍流场中湍流模型的研究

本文分析了双时间尺度湍流模型在复杂流场中的应用效果，并将双时间尺度概念和各向异性的Ｒｅｙｎｏｌｄｓ应力－应变关系相结合，对两个典型湍流场进行了数值模拟。结果表明，双时间尺度模型能较好地预测出复杂剪切流场中的平均物理量，较常规Ｋ－ε模型结果有很大改进。

Study of Turbulence Models in Complex Turbulent Shear Flows

The application effect of two-time-scale turbulence models to complex turbulent flows is analyzed, and the concept of two-time-scale is integrated with a non--linear Reynolds stress-strain expression. The computational results of two typical flows that two-time-scale models can predict mean physical quantities of complex turbulent flows reasonably well, and improve numerical results markedly over the standard K--e model.