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RESEARCH PAPERS: Papers From Symposium on Prediction of Centrifugal Compressor and Pump Stability and Surge

Asymmetric Flow in Vaneless Diffusers of Centrifugal Blowers

[+] Author and Article Information
Yasutoshi Senoo, Yoshifumi Kinoshita

Research Institute of Industrial Science, Kyushu University, Fukuoka, Japan

Masahiro Ishida

Nagasaki University, Nagasaki, Japan

J. Fluids Eng 99(1), 104-111 (Mar 01, 1977) (8 pages) doi:10.1115/1.3448501 History: Received December 24, 1975; Online October 12, 2010

Abstract

An analytical method is proposed to evaluate the flow behavior in vaneless diffusers assuming that the flow is not symmetric between the walls. In the analysis momentum integral equations are used together with some special relations for the main flow or for the maximum velocity flow. According to the authors’ experiment, for the case of a small flow rate a reverse flow is observed on one wall near the inlet of the diffuser but at a larger radius the reverse flow disappears and another reverse flow is observed on the other wall. The predictions quantitatively agree well with experiments not only in the case of large flow rates but also in the case of small flow rates where the flow pattern is very complicated.

Copyright © 1977 by ASME
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