Unsteady Flow Within Centrifugal Compressor Channels Under Rotating Stall and Surge PUBLIC ACCESS

[+] Author Affiliations
Shimpei Mizuki

Hosei University, Tokyo, Japan

Yoshimi Oosawa

Nippon Telegraph & Telephone, Tokyo, Japan

Paper No. 91-GT-085, pp. V001T01A033; 9 pages
  • ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Orlando, Florida, USA, June 3–6, 1991
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7898-9
  • Copyright © 1991 by ASME


Unsteady flow patterns throughout a centrifugal compressor system during the rotating stall and the surge were measured experimentally. Various kinds of unsteady behaviors of the flow appeared both continuously and suddenly as the flow rate decreased. The part-span stall, the full-span stall, the mild and the deep stalls and the deep surge appeared clearly. The fluctuations caused by the full-span stall were seen even during the surge and affected the flow within the scroll through the vaneless diffuser. The experimental results were compared with those computed by the lumped parameter theory. The good agreements between them were obtained when the appropriate values were selected for the lumped parameters.

Copyright © 1991 by ASME
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