Numerical Analysis of Cavitation Phenomena with Variable Speed Centrifugal Pump
Abstract
Cavitation is an abnormal physical phenomenon which can be generated in relatively low pressure regions in centrifugalpumps. In predicting and understanding cavitation in the pumps, it is important to secure their efficiency and reliability. Thepurpose of this study is to analyze the cavitation flows in centrifugal pumps with variable speeds through numerical methods.The Rayleigh–Plesset cavitation model was adapted as the source term for inter-phase mass transfer in order to predict andunderstand the cavitation performances. The Reynolds-average Navier-Stokes (RANS) equations were discretized by thefinite volume method. The two-equation SST turbulence model was accounted for turbulent flows. The numerical analysisresults were validated with experimental data and it was found that both results were in good accordance. The cavitationperformances were obtained for variable speeds with different temperatures and the effects on cavitation were describedaccording to different cavitation numbers. Cavitation performances were also observed for different centrifugal pump stages(1st and 2nd). The performances of cavitation decreased with the increase of rotational speed. In addition, the development ofcavitation is elucidated according to the different temperatures, and the effects of water vapor volume fraction are discussed.References
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25th International Pump Users Symposium, Turbomachinery Laboratory,
Texas A&M University, College Station, TX, 2009, pp. 113–144.
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Station Engineering Hand Book, Tokyo, (1991), pp. 50-90.
[3] C. E. Brennen, Hydrodynamics of pump, Oxford University Press,
1994.
[4] B. R. Shin, et, al., Application of preconditioning method to gas-liquid
two-phase flow computations, Journal of Fluids Engineering, ASME
126 (2004) 605–612.
[5] Hord J., Cavitation in liquid cryogens, Vol. I II III & IV NASA CR-
2054/2156/2242/2448 (1972a, 1972b, 1973, 1974).
[6] G. Kovich, Comparison of predicted and experimental cavitation performance
of 84 helical inducer in water and hydrogen, Vol. 7016, National
Aeronautics and Space Administration, 1970.
[7] H. A. Stahl, A. J. Stepanoff, N. Phillipsburg, Thermodynamic aspects
of cavitation in centrifugal pumps, ASME J. Basic Eng 78 (1956) 1691–
1693.
[8] Moore R.D. & Ruggeri R.S., Prediction of thermodynamic effects of
developed cavitation based on liquid hydrogen and freon-114 data in
scaled venturis, NASA TN D-4899, 1968.
[9] H. Kato, H. Yamaguchi, S. Okada, K. Kikuchi, M. Myanaga, Thermodynamic
effect on incipient and developed sheet cavitation, in: International
Symposium on Cavitation Inception, 1984, pp. 127–136.
[10] R. S. Ruggeri, R. D. Moore, Method for prediction of pump cavitation
performance for various liquids, liquid temperatures, and rotative
speeds, National Aeronautics and Space Administration, 1969.
[11] J.-P. Franc, E. Janson, P. Morel, C. Rebattet, M. Riondet, Visualizations
of leading edge cavitation in an inducer at different temperatures,
4th International Symposium on Cavitation, CAV2001, Pasadena, CA,
June 20–23, 2001.
[12] A. Cervone, R. Testa, C. Bramanti, E. Rapposelli, L. D’Agostino, Thermal
effects on cavitation instabilities in helical inducers, Journal of
propulsion and power 21 (5) (2005) 893–899.
[13] L. Torre, A. Cervone, A. Pasini, L. d’Agostino, Experimental characterization
of thermal cavitation effects on space rocket axial inducers,
Journal of Fluids Engineering 133 (11) (2011) 111303.
[14] F. Bakir, R. Rey, A. Gerber, T. Belamri, B. Hutchinson, Numerical and
experimental investigations of the cavitating behavior of an inducer,
International Journal of Rotating Machinery 10 (1) (2004) 15–25.
[15] N. J. Georgiadis, D. A. Yoder, W. B. Engblom, Evaluation of modified
two-equation turbulence models for jet flow predictions, AIAA journal
44 (12) (2006) 3107–3114.
[16] Ansys Inc. 2013, ANSYS-CFX (CFX Introduction, CFX Reference
guide, CFX Tutorials, CFX-Pre User’s Guide, CFX-Solver Manager
User’s Guide, Theory Guide), release 14.5, USA.
Published
2016-12-04
How to Cite
RAKIBUZZAMAN, MD; KIM, Kyungwuk; SUH, Sang-Ho.
Numerical Analysis of Cavitation Phenomena with Variable Speed Centrifugal Pump.
Journal of Power Technologies, [S.l.], v. 96, n. 4, p. 306--311, dec. 2016.
ISSN 2083-4195.
Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/889>. Date accessed: 24 apr. 2024.
Issue
Section
ICCHMT 2016 Cracow
Keywords
Cavitation performance, Variable speed, Rayleigh-Plesset cavitation model, RANS equation, SST Turbulence Model
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