Investigation of the Flow at the Exit of an Unshrouded Centrifugal Impeller and Comparison With the “Classical” Jet-Wake Theory

[+] Author and Article Information
K.-H. Rohne

ABB Turbo Systems Ltd., Baden, Switzerland

M. Banzhaf

Compressor Development, ABB Turbo Systems Ltd., Baden, Switzerland

J. Turbomach 113(4), 654-659 (Oct 01, 1991) (6 pages) doi:10.1115/1.2929131 History: Received January 19, 1990; Online June 09, 2008


L2F measurements of the flow at the exit of modern unshrouded centrifugal impellers with backswept blades yield a much more uniform velocity profile compared to former measurements on impellers with radial blading. Further evaluations show that the “classical” jet-wake theory assuming an isentropic jet and a wake flow congruent with the shape of the blade at the impeller exit needs correction in order to obtain meaningful results when interpreting thermodynamic measurements on centrifugal compressor stages.

Copyright © 1991 by The American Society of Mechanical Engineers
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