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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

Zangeneh, M., Vogt, D., and Roduner, C., 2002, “Improving a Vaned Diffuser for a Given Centrifugal Impeller by 3D Inverse Design,” ASME paper no. GT-2002-30621.
Goto, A., Ashihara, K, Sakurai, T., and Saito, S., 1999, “Compact Design of Diffuser Pump Using 3D Inverse Design Method,” ASME Fluids Engineering Summer Meeting, Paper No. FEDSM99-6847.
Zangeneh,  M., Goto,  A., and Harada,  H., 1998, “On the Design Criteria for Suppression of Secondary Flows in Centrifugal and Mixed Flow Impellers,” ASME J. Turbomach., 120, pp. 723–735.
Zangeneh, M., Schleer, M., Pløger F., Hong, S. S., Roduner, C., Ribi, B., and Abhari, R., 2004, “Investigation of an Inversely Designed Centrifugal Compressor Stage—Part 1: Design and Computational Investigations,” ASME J. Turbomach., 126, pp. 73–81.
Zangeneh,  M., 1991, “A Compressible Three Dimensional Blade Design Method for Radial and Mixed Flow Turbomachinery Blades,” Int. J. Numer. Methods Fluids, 13, pp. 599–624.
Hunziker, R., and Gyarmathy, G., 1993, “The Operational Stability of a Centrifugal Compressor and its Dependence on the Characteristics of the Sub-Components,” ASME paper no. 93-GT-284.
Roduner,  C., Köppel,  P., Kupferschmied,  P., and Gyarmathy,  G., 1999, “Comparison of Measurement Data at the Impeller Exit of Centrifugal Compressor Measured With Both Pneumatic and Fast Response Probes,” ASME J. Turbomach., 121, pp. 609–619.
Roduner,  C., Kupferschmied,  P., Köppel,  P., and Gyarmathy,  G., 2000, “On the Development and Application of the Fastresponse Aerodynamic Probe System in Turbomachines—Part 2: Flow, Surge, and Stall in a Centrifugal Compressor,” ASME J. Turbomach., 122, pp. 517–526.
Stahlecker, D., and Gyarmathy, G. 1998, “Investigations of Turbulent Flow in a Centrifugal Comprerssor Vaned Diffuser by 3-Component Laser Velocimetry,” ASME paper no. 98-GT-300.
Gizzi, W., Roduner, C., Stahlecker, D., Köppel, P., and Gyarmathy, G., 1999, “Time Resolved Measurements With Fast Response Probes and Laser Doppler Velocimetry at the Impeller Exit of a Centrifugal Compressor—A Comparison of two Measurement Techniques,” 3rd European Conference on Turbomachinery, London.
Casey,  M. V., and Roth,  P., 1984, “A Streamline Curvature Throughflow Method for Radial Turbocompressors,” I Mech E Conf. Publ., C57/34, pp. 9–18.
Casey, M. V., 1985, “Aerodynamische Auslegung von Hochleistungsradialverdichtern für Industrielle Turboverdichter,” VDI-Berichte 72.1, Strömungs-maschinen, pp. 167–181.
Kupferschmied,  P., Köppel,  P., Roduner,  C., and Gyarmathy,  G., 2000, “On the Development and Application of the Fast-Response Aerodynamic Probe System in Turbomachines—Part 1: The Measurement System,” ASME J. Turbomach., 122, pp. 505–516.
Eckardt,  D., 1976, “Detailed Flow Investigations Within a High-Speed Centrifugal Compressor Impeller,” ASME J. Fluids Eng., pp. 390–402.
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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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