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RESEARCH PAPERS

Application of Recess Vaned Casing Treatment to Axial Flow Fans

[+] Author and Article Information
A. R. Azimian, R. L. Elder, A. B. McKenzie

Department of Turbomachinery and Engineering Mechanics, School of Mechanical Engineering, Cranfield Institute of Technology, Cranfield, Bedford, MK43 OAL United Kingdom

J. Turbomach 112(1), 145-150 (Jan 01, 1990) (6 pages) doi:10.1115/1.2927411 History: Received January 13, 1989; Online June 09, 2008

Abstract

The effect of applying a vaned recessed casing treatment to a single-stage axial flow fan has been investigated. The influences of the axial position of the recess relative to the rotor leading edge and other geometric modifications of the vane passage have been examined. Significant improvements in stall margin were observed without (in some builds) loss in peak efficiency. Slow and fast frequency response yawmeter probes have been used in the study to examine both the steady flow conditions and the unsteady flow caused by rotating stall.

Copyright © 1990 by The American Society of Mechanical Engineers
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