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NUMERICAL ANALYSIS FOR UNSTEADY CVITATING FLOW IN A PUMP INDUCER

NUMERICAL ANALYSIS FOR UNSTEADY CVITATING FLOW IN A PUMP INDUCER,Kohei OKITA,Yoichiro MATSUMOTO,Kenjiro KAMIJO

NUMERICAL ANALYSIS FOR UNSTEADY CVITATING FLOW IN A PUMP INDUCER  
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In cavitatingflows of turbomachines,instabilities as the cav- itation surge and the rotating cavitation are observed. The objec- tive of the present study is to reproduce these unstable phenom- ena in cavitating flows by numerical simulation. Our method is based on the numerical method for incompressiblefluid flow, but which has been employed the compressibility through the low Mach number as an assumption. The evolution of cavitation is determined by an existing cavitation model with some modifi- cation that is represented by the source/sink of vapor phase in the liquid flow. We applied our method for cavitating flows in a cascade. As a result of two-dimensional calculation, the quasi- steady and unsteady phenomenawere reasonably simulated. The propagation of large-scale cavitation such as shedding of cloud cavitation was demonstrated. And we also report the results of three-dimensional calculation for unsteady cavitating flow in a pump inducer.
Published in 2003.
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