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TECHNICAL PAPERS

Investigation of an Inversely Designed Centrifugal Compressor Stage—Part II: Experimental Investigations

[+] Author and Article Information
M. Schleer, S. S. Hong, R. S. Abhari

Swiss Federal Institute of Technology, Turbomachinery Laboratory, Sonneggstrasse 3, CH-8092 Zurich, Switzerland

M. Zangeneh

Department of Mechanical Engineering, University College London, Torrington Place, London WCIE 7JE, UK

C. Roduner

ABB Turbo Systems, Bruggerstrasse 71A, 5401 Baden, Switzerland

B. Ribi

MAN Turbomaschinen AG, Hardstrasse 319, CH8005 Zurich, Switzerland

F. Pløger

HV Turbo A/S, Allegade 2, DK-3000 Helsingør, Denmark

J. Turbomach 126(1), 82-90 (Mar 26, 2004) (9 pages) doi:10.1115/1.1625690 History: Received December 01, 2002; Revised March 01, 2003; Online March 26, 2004
Copyright © 2003 by ASME
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References

Figures

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System layout compressor facility “Rigi”
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Cross-sectional view of the compressor with probe location
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Investigated impeller. Left: conventional E7X design. Right: inverse INV design.
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(Color online) Performance map for E7X and INV stage
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Tip of the single-sensor FRAP probe
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Velocity triangle at impeller exit
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Operating points for flow measurements
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(Color online) Total pressure ratio versus time across the diffuser passage at 105% radius location. (A) Inverse design. (B) E7X, nominal flow rate. (C) E7X, nominal pressure rise.
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(Color online) Meridional velocity versus time across the diffuser passage at 105% radius location. (A) Inverse design. (B) E7X, nominal flow rate.
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(Color online) Time-averaged meridional velocity
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(Color online) Absolute tangential velocity versus time across the diffuser passage at 105% radius location. (A) Inverse design. (B) E7X, nominal flow rate. (C) E7X, nominal pressure rise.
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(Color online) Time-averaged absolute tangential velocity
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(Color online) Absolute flow angle versus time across the diffuser passage at 105% radius location. (A) Inverse design. (B) E7X, nominal flow rate.
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(Color online) Time-averaged absolute flow angle
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(Color online) Time-averaged relative flow angle
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(Color online) Relative velocity versus time across the diffuser passage at 105% radius location. (A) Inverse design. (B) E7X, nominal flow rate. (C) E7X, nominal pressure rise.
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(Color online) Time-averaged relative velocity
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(Color online) Slip factor
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(Color online) Impeller efficiency
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(Color online) Velocity triangles at impeller exit near hub and shroud for both designs

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