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Analysis of hydraulic characteristics of fluid multiplier fish pump based on CFD simulation

文献类型： 外文期刊

作者： Liu, Andong 1 ; Zhang, Chenglin 1 ; Zhang, Yulei 1 ; Zhang, Yufei 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, Shanghai 200092, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Aquaculture Facil Engn, Shanghai 200092, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Fishery Equipment & Engn, Shanghai 200092, Peoples R China

关键词： Aquaculture; Fish lifting; Bladeless fish pump; Fluid multiplier; Hydrodynamic characteristics

期刊名称：OCEAN ENGINEERING （ 影响因子：5.0； 五年影响因子：5.2 ）

ISSN： 0029-8018

年卷期： 2023 年 272 卷

页码：

收录情况： SCI

摘要： The fish pump is an important power component for aquaculture, especially in offshore engineering vessel aquaculture and cage aquaculture. Reducing fish damage, improving survival rate, and increasing fish-lifting efficiency are the key points of fish pump research. In this study, we took a new type of fluid multiplier fish pump as the research object and selected many performance parameters that affect the hydrodynamic perfor-mance of the model prototype of the fish pump. The main conclusions are as follows: the fluid multiplier fish pump body produced a flow rate 2.8-3.5 times higher than the water injection port in the jet gap area, and under the influence of the high-flow-rate area, the low-pressure area generated at the fish inlet amplified the flow at the entrance of the fish. As a result, the fluid multiplier fish pump was able to suck and lift fish. With the change in the water jet gap from 2 mm to 4 mm, the head and flow of the bladeless fish pump were improved to a certain extent. We achieved an optimal value for the runner inclination angle during the change of the inclination angle of the pump body surface from - 4 degrees to 4 degrees, and it reached the highest value when the inclination angle was 2 degrees. In the process of increasing the water injection opening of the pump body from 50 mm to 65 mm, the head and flow of the bladeless fish pump greatly increased. The flow when the water injection opening was 65 mm was approximately 1.71 times that when the water injection opening was 50 mm. The head when the water injection opening was 65 mm was approximately 1.42 times that when the water injection opening was 50 mm. When the length of the guide vane was between 4 and 6 mm, the increase and decrease in the flow rate of the bladeless fish pump approached the maximum value of merit. The fluid multiplier fish pump designed in this study featured the characteristics of simple and lightweight structure and high fish-lifting flow, which can reduce labour intensity and improve the catching efficiency of aquaculture fish.

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