Influence of Critical Wall Roughness on the Performance of Double-Channel Sewage Pump

Xiaoke He, Yingchong Zhang, Chuan Wang, Congcong Zhang, Li Cheng, Kun Chen and Bo Hu
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Xiaoke He: School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Yingchong Zhang: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Chuan Wang: College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
Congcong Zhang: College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
Li Cheng: College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
Kun Chen: Ningbo Jushen Pumps Industry Co., Ltd., Ningbo 315100, China
Bo Hu: Deputy Energy & Power Engineering, Tsinghua University, Beijing 100084, China

Energies, 2020, vol. 13, issue 2, 1-20

Abstract: The numerical method on a double-channel sewage pump was studied, while the corresponding experimental result was also provided. On this basis, the influence of wall roughness on the pump performance was deeply studied. The results showed that there was a critical value of wall roughness. When the wall roughness was less than the critical value, it had a great influence on the pump performance, including the head, efficiency, and shaft power. As the wall roughness increased, the head and efficiency were continuously reduced, while the shaft power was continuously increased. Otherwise, the opposite was true. The effect of wall roughness on the head and hydraulic loss power was much smaller than that on the efficiency and disk friction loss power, respectively. With the increase of wall roughness, mechanical efficiency and hydraulic efficiency reduced constantly, leading to the decrement of the total efficiency. With the increase of flow rate, the effect of wall roughness on the head and efficiency gradually increased, while the influence on the leakage continuously reduced. The influence of the flow-through component roughness on the pump performance was interactive.

Keywords: double-channel sewage pump; critical wall roughness; numerical calculation; external characteristics (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (11)

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