A multi-phase CFD method is used to analyze centrifugal pump performance under developed cavitating conditions. The differential model employed is the homogeneous two-phase Reynolds-Averaged-Navier-Stokes equations, wherein mixture momentum and volume continuity equations are solved along with vapor volume fraction continuity. Mass transfer modeling is provided for the phase change associated with sheet cavitation. Using quasi-3D (Q3D) analysis, steady and time-dependent analyses were performed across a wide range of flow coefficients and cavitation numbers. Characteristic performance trends associated with off-design flow and blade cavitation are observed. The rapid drop in head coefficient at low cavitation numbers (breakdown) is captured for all flow coefficients. Local flow field solution plots elucidate the principal physical mechanisms associated with the onset of breakdown.
Performance Analysis of Cavitating Flow in Centrifugal Pumps Using Multiphase CFD
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division March 27, 2001; revised manuscript received October 16, 2001. Associate Editor: Y. Tsujimoto.
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Medvitz, R. B., Kunz , R. F., Boger , D. A., Lindau , J. W., Yocum, A. M., and Pauley, L. L. (May 28, 2002). "Performance Analysis of Cavitating Flow in Centrifugal Pumps Using Multiphase CFD ." ASME. J. Fluids Eng. June 2002; 124(2): 377–383. https://doi.org/10.1115/1.1457453
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