| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Numerical Simulation of Cavitation in a Centrifugal Pump at Low Flow Rate |
| TAN Lei1, CAO Shu-Liang2**, WANG Yu-Ming1, ZHU Bao-Shan2 |
1State Key Laboratory of Tribology, Tsinghua University, Beijing 100084
2State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084
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| Cite this article: |
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TAN Lei, CAO Shu-Liang, WANG Yu-Ming et al 2012 Chin. Phys. Lett. 29 014702 |
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Abstract Based on the full cavitation model which adopts homogeneous flow supposition and considering the compressibility effect on cavitation flow to modify the re-normalization group k–ϵ turbulence model by the density function, a computational model is developed to simulate cavitation flow of a centrifugal pump at low flow rate. The Navier–Stokes equation is solved with the SIMPLEC algorithm. The calculated curves of net positive suction head available (NPSHa) HNPSHa agree well with the experimental data. The critical point of cavitation in centrifugal pump can be predicted precisely, and the NPSH critical values derived from simulation are consistent with the experimental data. Thus the veracity and reliability of this computational model are verified. Based on the result of numerical simulation, the distribution of vapor volume fraction in the impeller and pressure at the impeller inlet are analyzed. Cavities first appear on the suction side of the blade head near the front shroud. A large number of cavities block the impeller channels, which leads to the sudden drop of head at the cavitation critical point. With the reduction of NPSHa, the distribution of pressure at the impeller inlet is more uniform.
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| Keywords:
47.55.Ca
64.70.Fm
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Received: 06 July 2011
Published: 07 February 2012
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| PACS: |
47.55.Ca
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(Gas/liquid flows)
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64.70.fm
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(Thermodynamics studies of evaporation and condensation)
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[1] Wang G Y, Senocak I, Shyy W, Ikohagi T and Cao S L 2001 Prog. Aerospace Sci. 37 551
[2] Coutier Delgosha O, Stutz B, Vabre A and Legoupil S 2007 J. Fluid. Mech. 578 171
[3] Zhou L J and Wang Z W 2008 J. Fluids. Engin. 130 011302
[4] Leroux J, Astolfi J and Billard Y 2004 J. Fluids Engin. 126 94
[5] Zhang Y, Luo X W, Ji B, Liu S H, Wu Y L and Xu H Y 2010 Chin. Phys. Lett. 27 016401
[6] Barre S, Rolland J, Boitel G, Goncalves G and Fortes P R 2008 J. Euromechfluid. 28 2321
[7] Pouffary B, Patella R F and Reboud J L 2008 J. Fluids Engin. 130 061301
[8] Ding H, Visser F C, Jiang Y and Furmanczyk M 2011 J. Fluids Engin. 133 011101
[9] Singhal A K, Athavale M M, Li H Y and Jiang Y 2002 J. Fluids Engin. 124 617
[10] Coutier Delgosha O, Fortes P R and Reboud J L 2003 J. Fluids Engin. 125 38
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