关键词: 涡轮机械;诱导轮;不可压缩流;时间推进方法~+;数值计算

Abstract: A time marching algorithms, which used to solve incompressible internal flow field of turbomachinery was developed. By using Chorin’s method of artificial compressibility, the control equations were transformed from elliptic type into hyperbolic systems in order to extend the time marching technique to very low Mach number flows. Viscous effects could be predicted by using a thin shear layer approximation to the N S equations and Baldwin Lomax eddy viscosity turbulence model. Some accelerating convergence techniques such as multi grid and local time step method were employed. Application to a flow field within a low solidity rocket pump inducer were presented and discussed. The calculated results indicate that the techniques can be used to predict the incompressible internal flow field of turbomachinery.

Key words: Turbomachinery;Idler wheel;Incompressible flow;Time marching method +;Numerical calculation