Research on the Relationship between Sediment Concentration and Centrifugal Pump Performance Parameters Based on CFD Mixture Model

Xinhao Wu, Peilan Su, Jianhua Wu (), Yusheng Zhang and Baohe Wang
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Xinhao Wu: College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Taiwan
Peilan Su: College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Taiwan
Jianhua Wu: College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Taiwan
Yusheng Zhang: College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Taiwan
Baohe Wang: College of Water Resource Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Taiwan

Energies, 2022, vol. 15, issue 19, 1-19

Abstract: To study the relationship between sediment concentration and the performance parameters of centrifugal pumps, Jiamakou water supply pumping station with total installed capacity of 30,880 kW was selected to analyze characteristics of the centrifugal pump in this paper. Based on a CFD mixture model, the effects of different sediment concentrations on the movement of solid–liquid two-phase flow and the performance parameters of the centrifugal pump were obtained. Then, fitting equations were established between performance parameters (head, flow rate, shaft power, and efficiency) of the centrifugal pump and sediment concentration at three working conditions (0.8 Q = 2 m 3 /s, Q = 2.5 m 3 /s, 1.2 Q = 3 m 3 /s) by the polynomial least-square method. Calculated values of fitting equations were compared with the measured values in centrifugal pump operation. The results show that, as the sediment concentration increases from 0.1% to 1%, the maximum volume fraction of sediment at blade outlet increased from 0.14% to 1.14%, and the maximum volume fraction of sediment at blade outlet increased from 0.7% to 2.29%. The turbulent kinetic energy inside the centrifugal pump increased from 8.74 m 2 /s 2 to 10.78 m 2 /s 2 . The calculated values of fitting equation are in good agreement with the measured values in centrifugal pump operation, and the maximum errors of head, flow rate, and efficiency are 6.48%, 3.54%, and 2.87%, respectively. Therefore, the reliability of the fitting equations is verified. The research method can provide a reference for the calculation of performance parameters for centrifugal pumps in other water supply pumping stations with sediment-laden flow.

Keywords: centrifugal pump; sediment concentration; solid-liquid two-phase flow; CFD; water supply engineering (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: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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