Flow Characteristics in Volute of a Double-Suction Centrifugal Pump with Different Impeller Arrangements

Yu Song, Honggang Fan, Wei Zhang and Zhifeng Xie
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Yu Song: Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Honggang Fan: State Key Laboratory of Hydroscience and Engineering, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Wei Zhang: State Key Laboratory of Hydroscience and Engineering, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Zhifeng Xie: School of Aerospace Engineering, Tsinghua University, Beijing 100084, China

Energies, 2019, vol. 12, issue 4, 1-15

Abstract: As an important type of centrifugal pump, the double-suction pump has been widely used due to its high efficiency region and large flow rate. In the present study, the complex flow in volute of a double-suction centrifugal pump is investigated by numerical simulation using a re-normalization group (RNG) k-ε model with experimental validation. Axial flows are observed in volute near the impeller outlet and compared with four staggered angles. The net area-weighted average axial velocities decrease as the staggered angle increases. The axial flows are mainly caused by the different circumferential pressure distribution at the twin impeller outlet. The dominant frequencies of the axial velocities for different staggered angles are f BP and its harmonic. The pressure fluctuations in most regions of the volute are obtained by superimposing the pressure generated by the two impellers.

Keywords: double-suction pump; axial flow; staggered angle; pressure difference; pressure fluctuation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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