跨音速压气机级的三维周期性非定常流动计算

Numerical Computations of Three-Dimensional Periodic Unsteady Flows in Transonic Compressor Stages

对跨音速压气机级动静叶排相干形成的三维非定常流场进行了数值研究，利用时间推进ＬＵ－ＳＧＳ稳式迭代法求解三维非定常欧拉方程，对流项采用高分辨率ＮＮＤ格式离散。对某压气机第一级动静叶排相干非定常流场的计算结果表明，本文方法不仅在收敛速度上明显地优于一般显式方法，而且保持了流场中激波的高分辨率。

The numerical studies of three dimensional periodic unsteady flows generated by the interaction of rotor/stator blades in a transonic compressor stage were made. The three dimensional unsteady Euler equations were solved by using LUSGS implicit marching method and high resolution NND scheme. The numerical solution of a transonic compressor stage was performed with this method. Not only the method is much faster in convergence rate and computation time than explicit schemes, but also the high resolution of flow shocks and correct prediction of the unsteady flow characteristics have been obtained. The method is the better choice for the numerical simulations of three dimensional unsteady flows in multi-stage axial turbomachinery.