Passive Control of Rotating Stall in a Parallel-Wall Vaneless Diffuser by Radial Grooves-Reference-Cited by-同舟云学术

Passive Control of Rotating Stall in a Parallel-Wall Vaneless Diffuser by Radial Grooves

Published:1999-12-06 Issue:1 Volume:122 Page:90-96
ISSN:0098-2202
Container-title:Journal of Fluids Engineering
language:en
Short-container-title:

Author:

Kurokawa Junichi¹,Saha Sankar L.²,Matsui Jun¹,Kitahora Takaya³

Affiliation:

1. Department of Mechanical Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan

2. Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan

3. Department of Mechanical Engineering, Shonan Institute of Technology, 1-1-25 Tujido-Nishikaigan, Fujisawa, Kanagawa, 251-8511, Japan

Abstract

In order to control and suppress rotating stall in the diffuser of a centrifugal turbomachine, a passive method of utilizing radial shallow grooves is proposed and its effect is studied theoretically and experimentally. The results show that radial grooves of 3 mm depth on one wall or of only 1 mm depth on both walls can suppress rotating stall in a vaneless diffuser for the entire flow range. Theoretical considerations have revealed that this remarkable effect of radial grooves is caused by two mechanisms; one is a significant decrease in tangential velocity at the diffuser inlet due to mixing between the main flow and the groove flow, and the other is a remarkable increase in radial velocity due to the groove reverse flow. Both effects have the same contribution to increase the flow angle. [S0098-2202(00)02901-1]

Publisher

ASME International

Subject

Mechanical Engineering

Link

http://asmedigitalcollection.asme.org/fluidsengineering/article-pdf/122/1/90/5581593/90_1.pdf

Reference31 articles.

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2. Poensgen, C. A., and Gallus, H. E., 1996, “Rotating Stall in a Single-Stage Axial Flow Compressor,” ASME J. Turbomach., 118, pp. 189–196.

3. Tsujimoto, Y., Yoshida, Y., and Mori., Y., 1996, “Study of Vaneless Diffuser Rotating Stall Based on Two-Dimensional Inviscid Flow Analysis,” ASME J. Fluids Eng., 118, pp. 123–127.

4. Chen, P., Soundra-Nayagam, M., Bolton, A. N., and Simpson, H. C., 1996, “Unstable Flow in Centrifugal Fans,” ASME J. Fluids Eng., 118, pp. 128–133.

5. Lawless, P. B., and Fleeter, S., 1995, “Rotating Stall Acoustic Signature in a Low-Speed Centrifugal Compressor: Part 1- Vaneless Diffuser,” ASME J. Turbomach., 117, pp. 87–96.

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