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RESEARCH PAPERS

Axial Fan Performance With Blade-Base Clearance

[+] Author and Article Information
T. Wright

Westinghouse Fluid Systems Laboratory, West Lafayette, Ind. 47906

J. Eng. Gas Turbines Power 106(4), 901-905 (Oct 01, 1984) (5 pages) doi:10.1115/1.3239655 History: Received June 29, 1983; Online October 15, 2009

Abstract

A study to evaluate the influence of increasing the clearance between blade and hub on a controllable pitch axial fan (CPAF) is presented. Fan performance was measured over a range of increasing clearance for several settings of blade pitch angles. The resulting variations of pressure rise, flow rate, and efficiency have been correlated as functions of established clearance parameters with good results. The study shows that large base clearances may result in reductions in efficiency and flow rate of 5 percent or greater in a typical CPAF configuration.

Copyright © 1984 by ASME
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