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RESEARCH PAPERS

Suppression of Secondary Flows in a Mixed-Flow Pump Impeller by Application of Three-Dimensional Inverse Design Method: Part 2—Experimental Validation

[+] Author and Article Information
A. Goto, T. Takemura

Ebara Research Company, Limited, Fujisawa-shi, Japan

M. Zangeneh

Department of Mechanical Engineering, University College of London, London, United Kingdom

J. Turbomach 118(3), 544-551 (Jul 01, 1996) (8 pages) doi:10.1115/1.2836701 History: Received February 04, 1994; Online January 29, 2008

Abstract

In Part 1 of this paper, a mixed-flow pump impeller was designed by a fully three-dimensional inverse design method, aimed at suppressing the secondary flows on the blade suction surface. In this part, the internal flow fields of the impeller are investigated experimentally, using flow visualization and phase-locked measurements of the impeller exit flow, in order to validate the effects of secondary flow suppression. The flow fields are compared with those of a conventional impeller, and it is confirmed that the secondary flows on the blade suction surface are well suppressed and the uniformity of the exit flow fields is improved substantially, in both circumferential and spanwise directions. The effects of tip clearance and the number of blades for the inverse designed impeller are also investigated experimentally and numerically.

Copyright © 1996 by The American Society of Mechanical Engineers
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