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Improved Model for the Design and Analysis of Centrifugal Compressor Volutes FREE

[+] Author Affiliations
R. A. Van den Braembussche, E. Ayder

von Karman Institute for Fluid Dynamics, Sint-Genesius-Rode, Belgium

D. Hagelstein, M. Rautenberg

University of Hannover, Hannover, Germany

R. Keiper

Kühnle, Kopp & Kausch AG, Frankenthal, Germany

Paper No. 98-GT-187, pp. V001T01A046; 9 pages
doi:10.1115/98-GT-187
From:
  • ASME 1998 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 1: Turbomachinery
  • Stockholm, Sweden, June 2–5, 1998
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7862-0
  • Copyright © 1998 by ASME

abstract

This paper describes a new model for the analysis of the flow in volutes of centrifugal compressors. It explicitly takes into account the vortical structure of the now that has been observed during detailed 3D flow measurements. It makes use of an impeller and diffuser response model to predict the non-uniformity of the volute inlet flow due, to the circumferential variation of the pressure at the volute inlet, and is therefore applicable also at off-design operation of the volute.

Predicted total pressure loss and static pressure rise coefficients at design and off-design operation have been compared with experimental data for different volute geometries but only one test case is presented here. Good agreement in terms of losses and pressure rise is observed at most operating points and confirms the validity of the impeller and diffuser response model.

Copyright © 1998 by ASME
Topics: Compressors , Design
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