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TECHNICAL PAPERS

Hydrodynamic Design of Pump Diffuser Using Inverse Design Method and CFD

[+] Author and Article Information
Akira Goto

Ebara Research Co., Ltd., Fujisawa-shi, Japan

Mehrdad Zangeneh

Department of Mechanical Engineering, University College London, London, UK

J. Fluids Eng 124(2), 319-328 (May 28, 2002) (10 pages) doi:10.1115/1.1467599 History: Received August 06, 2001; Revised January 18, 2002; Online May 28, 2002
Copyright © 2002 by ASME
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References

Hobbs,  D. E., and Weingold,  H. D., 1984, “Development of controlled diffusion aerofoils for multistage compressor applications,” ASME J. Eng. Gas Turbines Power, 106, pp. 271–278.
Hawthorne,  W. R., Tan,  C. S., Wang,  C., and McCune,  J. E., 1984, “Theory of Blade Design for Large Deflections: Part I-Two Dimensional Cascades,” ASME J. Eng. Gas Turbines Power, 106, pp. 346–353.
Tan,  C. S., Hawthorne,  W. R., Wang,  C., and McCune,  J. E., 1984, “Theory of Blade Design for Large Deflections: Part II-Annular Cascades,” ASME J. Eng. Gas Turbines Power, 106, pp. 354–365.
Borges,  J. E., 1990, “A Three-Dimensional Inverse Design Method in Turbomachinery: Part I-Theory,” ASME J. Turbomach., 112, pp. 346–354.
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.
Zangeneh,  M., Goto,  A., and Takemura,  T., 1996b, “Suppression of Secondary Flows in a Mixed Flow Pump Impeller by Application of 3-D Inverse Design Method: Part I-Design and Numerical Validation,” ASME J. Turbomach., 118, pp. 536–543.
Goto,  A., Zangeneh,  M., and Takemura,  T., 1996, “Suppression of Secondary Flows in a Mixed Flow Pump Impeller by Application of 3-D Inverse Design Method: Part 2-Experimental Validation,” ASME J. Turbomach., 118, pp. 544–551.
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.
Walker,  P. J., and Dawes,  W. N., 1990, “The Extension and Application of Three-Dimensional Time-Marching Analysis to Incompressible Turbomachinery Flows,” ASME J. Turbomach., 112, pp. 385–390.
Zangeneh,  M., 1996a, “Inverse Design of Centrifugal Compressor Vaned Diffusers in Inlet Shear Flows,” ASME J. Turbomach., 118, pp. 385–393.
Goto, A., 1995, “Numerical and Experimental Study of 3-D Flow Fields within a Diffuser Pump Stage at Off-Design Condition,” FED-227 , pp. 1–9, ASME-JSME Fluids Engineering Joint Conference.
Denton, J. D., 1990, “The Calculation of Three Dimensional Viscous Flow Through Multistage Turbomachines,” ASME Paper No. 90-GT-19.
Goto, A., 1997, “Prediction of Diffuser Performance using a 3-D Viscous Stage Calculation,” FEDSM97-3340, ASME Fluids Engineering Division, Summer Meeting.
Goto,  A., 1992, “Study of Internal Flow in a Mixed Flow Pump Impeller at Various Tip Clearances Using 3-D Viscous Flow Calculations,” ASME J. Turbomach., 114, pp. 373–382.
Takemura,  T., and Goto,  A., 1996, “Experimental and Numerical Study of Three-Dimensional Flows in a Mixed-Flow Pump Stage,” ASME J. Turbomach., 118, pp. 552–561.

Figures

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Computational grid (Case G)
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Definition of blade loading parameter (Case G)
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Conventional design stage Case C (design point). (a) CFD prediction; (b) oil-film flow pattern
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Velocity vectors near blade and hub surfaces of conventional stage Case C at design point
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Static and total pressure fields in conventional diffuser Case C at design point. (a) Static pressure ΔΨs on diffuser suction surface; (b) total pressure ΔΨt on quasi-orthogonal plane at 25%-chord location
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Blade angle distribution of preliminary design cases having conventional blade angle features
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Velocity vectors near suction surfaces of conventional diffusers at design point
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Velocity vectors near hub surface of conventional diffusers at design point
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Static and total pressure fields in conventional diffuser Case N at design point
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Comparison of predicted overall performance and hydraulic loss analysis at design point
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Comparison of blade angle distribution between conventional Case C and inverse design Case G
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Velocity vectors near blade and hub surfaces of inverse design stage Case G at design point
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Static and total pressure fields in inverse design diffuser Case G at design point; (a) Static pressure ΔΨs on diffuser suction surface; (b) total pressure ΔΨt on quasi-orthogonal plane at 25%-chord location
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Streamwise change in mass averaged static pressure rise coefficient at design point
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Exit flow nonuniformity at diffuser trailing edge at design point
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Comparison of overall performance between conventional design Case C and inverse design Case G
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Inverse design stage Case G (design point). (a) CFD prediction; (b) oil-film flow pattern
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Velocity vectors of inverse design diffuser Case FA at design point
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Effects of stacking condition on total pressure distribution Δψt at design point

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