斜网格修正的低速计算方法及应用

采用无坐标变换的一种有限体积法对RANS方程进行离散求解,离散方法考虑了对网格非正交情况的二阶修正,通过构造一个动量插值实现了同位网格下的压力修正算法,并发展了相应的分区算法.利用以上方法对轿车绕流和三峡坝区主流摆动问题进行了数值计算,计算结果与实验吻合较好.

Numerical methods with modfied scheme for skew grids of low speed flow and its applications

In this paper,a set of second order modfied methods for skew grids is proposed.By developing a Rhie-Chow's idea,Pressure Correction Algorithm using collocated grids is implemented,and a new implicit algorithm with domain decomposition is presented.Using these methods,the flow field around a passenger car and the main flow sway of the Three Gorges Project are simulated,and the results are in good agreement with the experimental results.