Characteristics of the Aerodynamics and the Noise of a Dual-cascade Centrifugal Fan Effects of Bare Ratio and Outlet Angle of Scroll Casing

Characteristics of the aerodynamics and the noise of dual-cascade centrifugal fan have been experimentally investigated with respect to the effects of the bare ratio and the outlet angle of scroll casing. It was shown that the performance of the fans became best when the bare ratio was around betwee...

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Bibliographic Details
Published inTurbomachinery Vol. 30; no. 2; pp. 91 - 98
Main Authors HATAKEYAMA, Makoto, KODAMA, Yoshio, SASAKI, Souichi, HAYASHI, Hidechito, GOTOH, Kenichi
Format Journal Article
LanguageJapanese
Published Turbomachinery Society of Japan 10.02.2002
Subjects
Dual-cascade Centrifugal Fan
Internal Flow
Noise
Scroll Casing
Specific Noise
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Summary:Characteristics of the aerodynamics and the noise of dual-cascade centrifugal fan have been experimentally investigated with respect to the effects of the bare ratio and the outlet angle of scroll casing. It was shown that the performance of the fans became best when the bare ratio was around between 9% to 25%, then the characterisitics of the dualcascade centrifugal fan were superior to that of the single-cascade centrifugal fan. The former was little influenced by the different bare ratio and the fans were able to be widely designed in comparison with the latter, the both characterisitics were improved when the outlet angle was 20 degrees.
ISSN:0385-8839
1880-2338
DOI:10.11458/tsj1973.30.91