Swirling Impeller Flow

[+] Author and Article Information
H. Krain

DFVLR, Institut für Antriebstechnik, Cologne, Federal Republic of Germany

J. Turbomach 110(1), 122-128 (Jan 01, 1988) (7 pages) doi:10.1115/1.3262157 History: Received February 03, 1987; Online November 09, 2009


The results of extensive laser measurements carried out in the blade passages of a newly designed backswept impeller are presented and discussed. Noticeable distortions of the throughflow patterns and a distinct swirling flow character were found inside the rotor. The measurement results and a simple theoretical approach suggest that the distorted throughflow patterns and the secondary flows are caused by a vortex flow. Although the relative flow has been significantly decelerated a comparatively smooth velocity profile has been identified at the rotor discharge that differed widely from the well-known jet/wake-type flow pattern.

Copyright © 1988 by ASME
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