【摘要】 本文提出了一个在回流区壁面附近湍流二方程模式的改进方法,并湍流的涡量输运方程及流函数方结合衰减函数的差分格式计算了局部阻塞管道中程,所得到的湍流的时均速度分布与前人的数值结果相比更接近实验结果.更多还原

【Abstract】 A revised method to use K-ε turbulence model in the near wall part of recirculating region is proposed.By use of this method with a finite difference Scheme of attenuation-function, equations of turbulent vorticity transfer and streamfunction in a locally constricted tube are solved.Computational results are compared with other’s experimental data and predictions.Improvements have been made.更多还原