Experimental and computational study was developed for unsteady hydrodynamic forces on a diffuser pump impeller excited by the interaction between the impeller and the vaned diffuser with the same number of vanes as impeller. Unsteady flow calculations are made using commercially available CFD software, CFX-TASCflow, as well as the two-dimensional vortex method. Calculated pressure and fluid forces on the impeller show good agreement with measured ones. It has been demonstrated that the fluid forces on the impeller with the same number of vanes as the vaned diffuser are smaller compared with other combinations of vane numbers. However, the pressure fluctuations are found to be greater than other cases.
Issue Section:
Technical Papers
1.
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, J.
, Jud
, W.
, and Hughes
, S. F.
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.2.
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, W.
, and Flack
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,” ASME J. Eng. Power
0022-0825 82
(2
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.5.
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, and Tsukamoto
, H.
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,” ASME J. Fluids Eng.
0098-2202 119
, pp. 647
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.6.
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. W.
, and Tsukamoto
, H.
, 1997, “Theoretical Study of Pressure Fluctuations Downstream of a Diffuser Pump Impeller - Part 2: Effects of Volute, Flow Rate and Radial Gap
,” ASME J. Fluids Eng.
0098-2202 119
, pp. 653
–658
.7.
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, W.
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,” Ph.D. thesis, Kyushu Institute of Technology (in Japanese).8.
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, F.
, and Tsukamoto
, H.
, 2001, “Numerical Study of Pressure Fluctuations Caused by Impeller-Diffuser Interaction in a Diffuser Pump Stage
,” ASME J. Fluids Eng.
0098-2202, 123
, pp. 466
–474
.9.
CFX-TASCflow, Version 2.10, Primer Manual
, AEA Technology Engineering Ltd.
, Harwell, UK,10.
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, H.
, and Tsukamoto
, H.
, 2001, “Fundamental Analysis on Rotor-Stator Interaction in a Diffuser Pump by Vortex Method
,” ASME J. Fluids Eng.
0098-2202 123
(4
), pp. 737
–747
.11.
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, M. B.
, and Baché
, G. E.
, 1999, “Aerodynamically Induced Radial Forces in a Centrifugal Gas Compressor: Part 2—Computational Investigation
,” ASME J. Eng. Gas Turbines Power
0742-4795 121
, pp. 725
–734
.12.
Flathers
, M. B.
, Baché
, G. E.
, and Rainsberger
, R.
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,” 39th ASME Turbo Expo, The Hague, The Netherlands, ASME, New York, ASME Paper No. 94-GT-134.13.
Gu
, F. H
, Engeda
, A.
, Cave
, M.
, and Liberti
, J-L. D.
, 2001, “A Numerical Investigation on the Volute/Diffuser Interaction Due to the Axial Distortion at the Impeller Exit
,” ASME J. Fluids Eng.
0098-2202 123
, pp. 475
–483
.14.
Lakshminarayana
, B.
, 1991, “An Assessment of Computational Fluid Dynamics Techniques in the Analysis and Design of Turbomachinery
,” ASME J. Fluids Eng.
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, pp. 315
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, AEA Technology Engineering Ltd.
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, M. H.
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, J.
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, H.
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,” 0525-2997, 215
, pp. 191
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.18.
Zhang
, M.
, Wang
, H.
, and Tsukamoto
, H.
, 2002, “Numerical Analysis of Unsteady Hydrodynamic Forces on a Diffuser Pump Impeller Due to Rotor-Stator Interaction
,” Proc. of FEDSM 02, 14–18 July, Montreal, ASME, New York
, ASME Paper No. FEDSM2002-31181.Copyright © 2005
by American Society of Mechanical Engineers
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