A Visualized Experimental Study on the Influence of Reflux Hole on the Double Blades Self-Priming Pump Performance

Heng Qian, Denghao Wu, Chun Xiang, Junwei Jiang, Zhibing Zhu, Peijian Zhou and Jiegang Mou
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Heng Qian: Zhejiang Engineering Research Center for Advanced Hydraulic Equipment, School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
Denghao Wu: College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, China
Chun Xiang: Zhejiang Engineering Research Center for Advanced Hydraulic Equipment, School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
Junwei Jiang: Zhejiang Engineering Research Center for Advanced Hydraulic Equipment, School of Mechanical and Automotive Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
Zhibing Zhu: Shimge Pump Industry (Hangzhou) Co., Ltd., Hangzhou 310018, China
Peijian Zhou: College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, China
Jiegang Mou: College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, China

Energies, 2022, vol. 15, issue 13, 1-11

Abstract: The self-priming pump is a kind of centrifugal pump product with self-priming function, and the structural parameters of its reflux hole determine the performance. In order to reveal the mechanism of the self-priming process, we summarized the influence of structure parameters of the reflux hole on the performance of the self-priming pump. In this study, the transparent experimental pump was designed and manufactured, and a visual test bench was built. The gas–liquid two-phase flow pattern during the self-priming process with different reflux hole structure parameters was captured by high-speed camera. Results showed that: (1) the reflux hole of the self-priming pump affected the self-priming performance of the pump by affecting the backflow rate of the gas and liquid phases during the self-priming process. (2) Due to the uneven distribution of liquid velocity in the pump, the position of reflux hole had an obvious impact on the duration of self-priming middle stage, and the shortest duration was 13 s when ? = +15° and the longest duration was 45 s when ? = ?30°. (3) The diameter of reflux hole had a very significant impact on the duration of the self-priming middle stage, and the shortest duration was 17 s when d = 10 mm and the longest duration was 94 s when d = 0 mm.

Keywords: gas–liquid two-phase flow; self-priming process; reflux hole; visualization experiment (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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