Effects of the Impeller Blade with a Slot Structure on the Centrifugal Pump Performance

Hongliang Wang, Bing Long, Chuan Wang, Chen Han and Linjian Li
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Hongliang Wang: School of Aerospace and Mechanical Engineering/Flight College, Changzhou Institute of Technology, Changzhou 213032, China
Bing Long: School of Aerospace and Mechanical Engineering/Flight College, Changzhou Institute of Technology, Changzhou 213032, China
Chuan Wang: College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China
Chen Han: National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
Linjian Li: National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China

Energies, 2020, vol. 13, issue 7, 1-17

Abstract: An impeller blade with a slot structure can affect the velocity distribution in the impeller flow passage of the centrifugal pump, thus affecting the pump’s performance. Various slot structure geometric parameter combinations were tested in this study to explore this relationship: slot position p , slot width b 1 , slot deflection angle β , and slot depth h with (3–4) levels were selected for each factor on an L 16 orthogonal test table. The results show that b 1 and h are the major factors influencing pump performance under low and rated flow conditions, while p is the major influencing factor under the large flow condition. The slot structure close to the front edge of the impeller blade can change the low-pressure region of the suction inlet of the impeller flow passage, thus improving the fluid velocity distribution in the impeller. Optimal slot parameter combinations according to the actual machining precision may include a small slot width b 1 , slot depth h of ¼ b , slot deflection angle β of 45°–60°, and slot position p close to the front edge of the blade at 20–40%.

Keywords: blade slot; orthogonal test; numerical simulation; centrifugal pump (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 (3)

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