Analysis of the Transonic Flow at the Inlet of a High Pressure Ratio Centrifugal Impeller PUBLIC ACCESS

[+] Author Affiliations
Gernot Eisenlohr

BMW Rolls-Royce GmbH, Oberursel, Germany

Peter Dalbert

Sulzer Turbo AG, Zürich, Switzerland

Hartmut Krain

DLR-Köln, Germany

Hartwig Pröll

MAN B&W, Augsburg, Germany

Franz-Arno Richter

GHH Borsig TM GmbH, Germany

Karl-Heinz Rohne

ABB Turbo Systems, Baden, Switzerland

Paper No. 98-GT-024, pp. V001T01A007; 11 pages
  • 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


In an industrial research project of German and Swiss Turbo Compressor manufacturers a high pressure ratio centrifugal impeller was designed and investigated. Performance measurements and extensive laser measurements (L2F) of the flow field upstream, inside and downstream of the rotor have been carried out. In addition to that, 3D calculations have been performed, mainly for the design point. Some earlier results have been presented by Krain et al., 1995.

With four different viscous 3D-solvers, used in companies of the group, calculations for the design speed were carried out to investigate the suitability of these programs in the various design procedures.

Special attention was given to the area from rotor inlet up to the splitter blades. The results for the flow field obtained with the four viscous 3D-Solvers are compared with one another and with the L2F-measurements.

Copyright © 1998 by ASME
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