Research on Cavitation Wake Vortex Structures Near the Impeller Tip of a Water-Jet Pump

Yun Long (), Mingyu Zhang, Zhen Zhou, Jinqing Zhong, Ce An, Yong Chen, Churui Wan and Rongsheng Zhu
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Yun Long: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Mingyu Zhang: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Zhen Zhou: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Jinqing Zhong: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Ce An: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China
Yong Chen: State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
Churui Wan: Marine Design and Research Institute of China, NO 1688 South Xizang Road, Shanghai 200011, China
Rongsheng Zhu: National Research Center of Pumps, Jiangsu University, Zhenjiang 212013, China

Energies, 2023, vol. 16, issue 4, 1-20

Abstract: Cavitation can cause noise in the water-jet pump. If cavitation occurs in the water-jet pump, the hydraulic components in the pump are prone to erosion. The surface erosion reduces energy delivery efficiency and increases maintenance costs. The decline in pump performance will lead to the instability of the entire energy system. In this paper, the cavitation flow structure of the water-jet pump is studied by the method of numerical simulation and experiment, which provides a reference for the prediction and improvement of cavitation. Based on the closed test platform, in order to reveal the physical process of cavitation evolution, high-speed photography is used to capture the complex cavitation flow phenomenon in the pump. After that, the cavitation vortex structure was further explored by numerical simulation. Through the simulation of the impeller blade tip leakage flow and the Tip Leakage Vortex Cavitation (TLVC) characteristics under different cavitation conditions, the flow mechanism of the impeller blade tip leakage flow and the separation vortex induced by the cavitation region under different cavitation conditions were revealed. The main factors affecting the development of the cavitation wake vortex structures were summarized.

Keywords: water-jet pump; cavitation; cavitation flow structure (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: 2023
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