旋成体零攻角纵向大扰动势流的AF-2迭代及其并行算法

AF 2 ITERATION AND ITS PARALLEL ALGORITHM FOR TRANSONIC FLOW WITH LARGE DISTURBANCES IN FREESTREAM-DIRECTION AROUND AXISYMMETRIC BODIES AT ZERO ANGLE OF ATTACK

1.引言 为提高跨音速差分计算效率,人们在计算格式的设计、改进方面做了大量的工作,并取得了可喜的成就。并行计算机的出现和发展,使我们有可能进一步提高计算效率。第9期阂赛金等:旋成体零攻角纵向大扰动势流的人F一2迭代及其并行算法A弓n因为并行处理机具有处理数据能力强、计算效益高的特点,但这种机器必须结合具体问题和机器特点加以考虑才能发挥其优势。目前,利用我国设计的“YH一1”(“银河一1”)亿次并行处理机。

The calculations of AF-2 scheme are made by serial algorithm and parallel algorithm on computer''Yinhe-l'for solving axisymme-trical transonic potential equation with large disturbances in the freestream direction and small disturbance in the radial direction. By computations, the convergence of AF-2 is compared with that of SLOR, and the efficiency for parallel algorithm of AF-2 is compared with the efficiency for serial algorithm. Results indicate rhat A.F-2 technique has led to a 3-7 fold improvement in convergence against SLOR. and the computation efficiency by the parallel algorithm of AF-2 is about 3 times higher than that by the serial algorithm of AF-2.