用多层网格法解二维无粘跨音叶栅流动

SOLUTION FOR TWO DIMENSIONAL INVISCID TRANSONIC CASCADE FLOWS WITH MULTIPLE-GRID ALGORITHM

本文给出一种较有效的多层网格构成形式,并提出“预测—修正”壁面边界处理法。通过采用当地时间步和引入余差光滑处理法,进一步提高了格式的收敛性和稳定性。作为算例,本文对二维无粘跨音速叶栅流动求解,计算结果与试验数据对比表明,本算法收敛快和计算精度好。

This paper gives an efficient form of multiple-grid scheme and presents a 'prediction-correction ' method for processing the boundary conditions on a solid wall. The conver-gency and the stability of the scheme can be further improved by using local time stepping and residual smoothing. Finally, two-dimensional inviscid transonic cascade flows are calculated. The comparison between the calculated and the measured results shows that this scheme possesses very fast convergence speed and satisfactory accuracy.