具有粘性效应的离心叶轮内部完全三元流场的数值模拟

1前言近年来，随着数值计算技术的进步和电子计算机性能的提高和应用的普及，在求解工程应用中经常遇到的流体定常流动正问题中，过去因受到计算条件的限制而很少采用的直接解三元流动基本方程组的方法已得到了越来越广泛的应用，但对于求解描述实际气体真实流动状况的Navier－Stokes方程，在绝大多数实际条件下为得到定量计算的数值解常常因计算机容量、速度等的限制而无法实现，各种经过简化的湍流模型方程通常只用在作流场的定性分析。在工程使用中仍大多以忽略粘性的欧拉运动方程为主，对实际气体粘性产生的影响则根据经验数据进行总体…

THE CALCULATION CONCERNING VISCIOUS EFFECTS OF FULLY 3D FLOW IN CENTRIFUGAL ROTOR

This paper is to calculate the fully 3D steady flow in a centrifugal rotor by time marching finite volumn method. The use of a nonoverlapping grid makes resulting process simpler,faster, and more accurate. A distributed body force term added in Euler momeotum equtions calculates low energy fiuid by impirical input data so as to simulate viscious effects in real flow with little extra cost of CPU time. Since the flow condition in centrifugal rotor is complex, a jet-wake model usually forms at the impeller exit, it is necessary to adopt 3D computational technique and viscosity should be considered in numerical simulation to reduce the loss of efficience at design.