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| DOI： |
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| Cavitation in Double-suction Centrifugal Pump with Staggered Impeller |
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QIU Sheng, LIU Xiaobing, BAI Li, HU Quanyou, AN Manyi
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School of Energy and Power Engineering, Xihua University, Chengdu 610039, China
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| Abstract: |
| A cavitation model based on the Rayleigh-plesset equation and the RNG k-ε turbulence model was developed in this paper to simulate internal cavitation flow in double-suction centrifugal pump with staggered blades on both sides of the impeller. We analyzed the impact of cavitation on pressure distribution in the pump using the model, and obtained the cavitation characteristic curve. We also investigated the radial force of the impeller under different flow conditions, the effect of cavitation on volumetric fraction of the impeller vortex as well as the distribution of turbulent kinetic energy within the pump. The results showed that the cavitation in the double- suction centrifugal pump with staggered impeller was consistent with that in the conventional centrifugal pump, and that the cavitation had a significant impact on the radial force and the turbulent kinetic energy distribution over the impeller. |
| Key words: double suction centrifugal pump; staggered impeller; cavitation flow; numerical simulation |
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