Calculations of Three-Dimensional, Viscous Flow and Wake Development in a Centrifugal Impeller

[+] Author and Article Information
J. Moore, J. G. Moore

Rolls-Royce, Aero Division, Bristol, England

J. Eng. Power 103(2), 367-372 (Apr 01, 1981) (6 pages) doi:10.1115/1.3230730 History: Received May 27, 1980; Online November 09, 2009


A partially-parabolic calculation procedure is used to calculate flow in a centrifugal impeller. This general-geometry, cascade-flow method is an extension of a duct-flow calculation procedure. The three-dimensional pressure field within the impeller is obtained by first performing a three-dimensional inviscid flow calculation and then adding a viscosity model and a viscous-wall boundary condition to allow calculation of the three-dimensional viscous flow. Wake flow, resulting from boundary layer accumulation in an adverse reduced-pressure gradient, causes blockage of the impeller passage and results in significant modifications of the pressure field. Calculated wake development and pressure distributions are compared with measurements.

Copyright © 1981 by ASME
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