三维扭曲叶片贴体网格生成的多网格-强隐式方法

THREE-DIMENSIONAL GRID GENERATION FOR TWISTED CHANNELS OF A CENTRIFUGAL IMPELLER WITH MULTI-GRID THREE-DIMENSIONAL STRONGLY IMPLICIT PROCEDURE

采用直接求解偏微分方程组的方法生成具有复杂扭曲规律的三元离心叶轮贴体网格坐标.在数值求解中采用了三维强隐式方法和多网格技术,大大提高了数值计算的收敛速度.用本方法生成的三维贴体网格,具有网格线光滑性好,并可较方便地控制网格曲线的分布规律等优点,可用于三维粘性流场和跨音流场计算网格的生成.

The body-fitted computational grid for twisted channels of a centrifugal impeller is generated by solving elliptic partial differential equations directly,so that the grid lines are smooth. Multi-grid technique (MG) and three dimensional strongly implicit procedure (TSIP) are studied to speed up the convergence rate of computation. With control functions,the grid line distribution can be controlled easily.