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Article

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

1
School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
2
National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
3
College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
4
Ningbo Jushen Pumps Industry Co., Ltd., Ningbo 315100, China
5
Deputy Energy & Power Engineering, Tsinghua University, Beijing 100084, China
*
Authors to whom correspondence should be addressed.
Energies 2020, 13(2), 464; https://doi.org/10.3390/en13020464
Received: 22 November 2019 / Revised: 13 January 2020 / Accepted: 13 January 2020 / Published: 17 January 2020
(This article belongs to the Special Issue Mathematical Modelling of Energy Systems and Fluid Machinery)
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. View Full-Text
Keywords: double-channel sewage pump; critical wall roughness; numerical calculation; external characteristics double-channel sewage pump; critical wall roughness; numerical calculation; external characteristics
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MDPI and ACS Style

He, X.; Zhang, Y.; Wang, C.; Zhang, C.; Cheng, L.; Chen, K.; Hu, B. Influence of Critical Wall Roughness on the Performance of Double-Channel Sewage Pump. Energies 2020, 13, 464. https://doi.org/10.3390/en13020464

AMA Style

He X, Zhang Y, Wang C, Zhang C, Cheng L, Chen K, Hu B. Influence of Critical Wall Roughness on the Performance of Double-Channel Sewage Pump. Energies. 2020; 13(2):464. https://doi.org/10.3390/en13020464

Chicago/Turabian Style

He, Xiaoke, Yingchong Zhang, Chuan Wang, Congcong Zhang, Li Cheng, Kun Chen, and Bo Hu. 2020. "Influence of Critical Wall Roughness on the Performance of Double-Channel Sewage Pump" Energies 13, no. 2: 464. https://doi.org/10.3390/en13020464

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