The Extension and Application of Three-Dimensional Time-Marching Analyses to Incompressible Turbomachinery Flows

[+] Author and Article Information
P. J. Walker

Rolls-Royce plc., Derby, United Kingdom

W. N. Dawes

Whittle Laboratory, Cambridge, United Kingdom

J. Turbomach 112(3), 385-390 (Jul 01, 1990) (6 pages) doi:10.1115/1.2927671 History: Received February 01, 1989; Online June 09, 2008


Conventional time-marching flow solvers perform poorly when integrating compressible flow equations at low Mach number levels. This is shown to be due to unfavorable interaction between long-wavelength errors and the inflow and outflow boundaries. Chorin’s method of artificial compressibility is adopted to extend the range of Denton’s inviscid flow solver and Dawes’ three-dimensional Navier–Stokes solver to zero Mach number flows. The paper makes a new contribution by showing how to choose the artificial acoustic speed systematically to optimize convergence rate with regard to the error wave–boundary interactions. Applications to a turbine rotor and generic water pump geometry are presented.

Copyright © 1990 by The American Society of Mechanical Engineers
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