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http://dx.doi.org/10.5293/kfma.2015.18.1.065

Cavitating Flow Analysis of Multistage Centrifugal Pump  

Rakibuzzaman, Rakibuzzaman (Department of Mechanical Engineering, Soongsil University)
Suh, Sang-Ho (Department of Mechanical Engineering, Soongsil University)
Kim, Hyoung-Ho (Department of Mechanical Engineering, Soongsil University)
Cho, Min-Tae (Dooch Co.)
Shin, Byeong-Rog (Institute of Flow Informatics)
Publication Information
The KSFM Journal of Fluid Machinery / v.18, no.1, 2015 , pp. 65-71 More about this Journal
Abstract
The purpose of this study is to investigate cavitating flow of the multistage centrifugal pump. Cavitation is observed in the impeller leading edge and trailing edge of the suction area. Head coefficients are measured under different flow operating conditions. The Rayleigh-Plesset cavitation model is adapted to predict the occurrence of cavitation in the pump. The two-phase gas-liquid homogeneous CFD method is used to analyze the centrifugal pump performances with two equation transport turbulence model. The simulations are carried out with three different flow coefficients such as 0.103, 0.128 and 0.154. The occurrence of cavitation described according to water vapor volume fraction. The head versus NPSH (Net Positive Suction Head) also measured using different flow coefficients. Development of cavitation in the centrifugal pump impellerI is discussed. It is showed that the simulation represents the head drop about 3%.
Keywords
Cavitating flow analysis; CFD; Homogeneous model; NPSH; Vapor volume fraction;
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