Numerical Analysis of Cavitation Phenomena with Variable Speed Centrifugal Pump

  • MD RAKIBUZZAMAN Soongsil University
  • Kyungwuk Kim Soongsil University
  • Sang-Ho Suh Soongsil University

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.

Author Biographies

MD RAKIBUZZAMAN, Soongsil University
Mechanical Engineering, Associate Research Engineer
Sang-Ho Suh, Soongsil University
Professor, Department of Mechanical Engineering

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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: 17 sep. 2021.
Section
ICCHMT 2016 Cracow

Keywords

Cavitation performance, Variable speed, Rayleigh-Plesset cavitation model, RANS equation, SST Turbulence Model

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