The Development of Wake Flow in a Centrifugal Impeller

[+] Author and Article Information
M. W. Johnson, J. Moore

Engineering Department, Cambridge University, Trumpington Street, Cambridge CB2 1PZ, England

J. Eng. Power 102(2), 382-389 (Apr 01, 1980) (8 pages) doi:10.1115/1.3230265 History: Received January 03, 1979; Online September 28, 2009


Three-dimensional flow, leading to the formation and the growth of a wake in a centrifugal impeller, has been studied. Results of flow measurements in a 1 m dia, shrouded, centrifugal compressor impeller running at 500 rpm are presented. Relative velocities and rotary stagnation pressures (p* = p + 1/2ρW2 − 1/2ρω2 r2 ) were measured, on five cross-sectional planes between the inlet and outlet of the impeller, using pressure probes which were traversed within the rotating impeller passage. Particular attention was given to the convection of low p* fluid by secondary flows and to the formation of the wake in the shroud/suction-side corner region of the passage.

Copyright © 1980 by ASME
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