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RESEARCH PAPERS

Rotating Stall Induced in Vaneless Diffusers of Very Low Specific Speed Centrifugal Blowers

[+] Author and Article Information
Y. Kinoshita, Y. Senoo

Research Institute of Industrial Science, Kyushu University 86, Kasugashi, Fukuoka 816, Japan

J. Eng. Gas Turbines Power 107(2), 514-519 (Apr 01, 1985) (6 pages) doi:10.1115/1.3239761 History: Received January 18, 1984; Online October 15, 2009

Abstract

The limit of rotating stall was experimentally determined for three very small specific speed centrifugal blowers. The impellers were specially designed for stall-free at very small flow rates, so that the cause of rotating stall could be attributed to the vaneless diffusers. Experimental results demonstrated that the blowers did not stall until the flow coefficient was reduced to very small values, which had never been reported in the literature. The critical flow coefficient for rotating stall agreed very well with the prediction based on a flow analysis and a criterion for rotating stall in vaneless diffusers developed by the authors.

Copyright © 1985 by ASME
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