Application of Recess Vaned Casing Treatment to Axial Flow Fans PUBLIC ACCESS

[+] Author Affiliations
A. R. Azimian, R. L. Elder, A. B. McKenzie

Cranfield Institute of Technology, Cranfield, Bedford

Paper No. 89-GT-68, pp. V001T01A039; 6 pages
  • ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Toronto, Ontario, Canada, June 4–8, 1989
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7913-9
  • Copyright © 1989 by ASME


The effect of applying a vaned recessed casing treatment to a single stage axial flow fan has been investigated. The influence of the axial position of the recess relative to the rotor leading edge and other geometrical 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 © 1989 by ASME
Topics: Fans , Axial flow
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