排灌机械工程学报
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Journal of Drainage and Irrigation Machinery Engin  2011, Vol. 29 Issue (2): 99-103    DOI: 10.3969/j.issn.1674—8530.2011.02.002
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CFD simulation on cavitation characteristics in centrifugal pump
Wang Yong, Liu Houlin, Yuan Shouqi, Tan Minggao, Wang Kai
(Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang, Jiangsu 212013, China)
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Abstract The standard k-ε turbulence model, homogeneous multiphase model and Rayleigh-Plesset equation were applied to simulate cavitation characteristics in a centrifugal pump with specific speed of 94 under different conditions based on ANSYS CFX software. According to the simulation results, the energy characteristics under the no-cavitation conditions and cavitation characteristics of the model pump were predicted, and the vapor volume distribution on the middle stream surface of impellerand the blade loading characteristics on the middle stream line under different cavitation conditionswere analyzed. The comparison between prediction values and experimental values indicates that the prediction results are accurate to some extent, and the absolute errors of net positive suction head under different conditions are 0.25, 0.29 and 0.06 m, respectively. The flow field analysis indicates that the vapors generated at suction side of blade near the leading edge at firstand then extended to the outlet of impeller with the reduction of inlet total pressure. Compared with other blades, the loading on the blade that against the volutetongue is the least and the loading on the other blades at the relative position of 0.35-0.80increased obviously with the deterioration of cavitation condition,which shows that the blade loading is significantly affected by cavitation.
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Articles by authors
WANG Yong
LIU Hou-Lin
YUAN Shou-Qi
TAN Ming-Gao
WANG Kai
Key wordscentrifugal pump   cavitation characteristics   blade loading   computational fluid dynamics   flow field     
Received: 2010-11-05; Published: 2011-03-30
Cite this article:   
WANG Yong,LIU Hou-Lin,YUAN Shou-Qi et al. CFD simulation on cavitation characteristics in centrifugal pump[J]. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(2): 99-103.
 
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