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RESEARCH PAPERS: Vibration and Sound

The Influence of Geometric Parameters on F. C. Centrifugal Fan Noise

[+] Author and Article Information
Ken Morinushi

Central Research Laboratory, Mitsubishi Electric Corporation, Amagasaki, Hyogo, Japan

J. Vib., Acoust., Stress, and Reliab 109(3), 227-234 (Jul 01, 1987) (8 pages) doi:10.1115/1.3269425 History: Received January 01, 1985; Online November 23, 2009

Abstract

In this report, through experiments the influence of five major geometric parameters on noise and aerodynamic performance of forward curved (F.C.) centrifugal fans was studied. The parameters considered are: (1) width-inner diameter ratio of impeller, (2) axial clearance between the fan inlet nozzle and the impeller shroud plate, (3) blade-setting angle, (4) blade pitch-chord ratio, and (5) spiral extension index of the scroll. Noise characteristics were evaluated by means of the specific noise level (A-weighted) at every operating point except the surging region. The optimal values for the parameters to realize low noise are discussed. Design diagrams for low noise F.C. centrifugal fans are shown.

Copyright © 1987 by ASME
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