Centrifugal Fan Performance With Distorted Inflows

[+] Author and Article Information
T. Wright

Westinghouse Fluid Systems Laboratory, West Lafayette, Ind. 47906

S. Madhavan, J. DiRe

Westinghouse Sturtevant Division, Hyde Park, Mass.

J. Eng. Gas Turbines Power 106(4), 895-900 (Oct 01, 1984) (6 pages) doi:10.1115/1.3239654 History: Received June 29, 1983; Online October 15, 2009


Efforts to quantify degradation of the performance of a centrifugal fan subjected to distorted inflows are presented. The study centered on examination of pressure rise, efficiency, and onset of stall for a backwardly-inclined, airfoil-bladed fan. Nonuniform flow patterns were generated in an adjustable countervane damper assembly installed upstream of the inlet box, and systematic families of performance curves were generated. Results of these tests show that significant degradation in efficiency and pressure rise—as much as 10 to 15 percent—may result from moderately to severely distorted inflow patterns. Onset of stall was significantly influenced by severely distorted inflows.

Copyright © 1984 by ASME
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