Research on Optimization of the Bulb Form of the Bulb Tubular Pump Device for a Low-Head Agricultural Irrigation Pumping Station

Hongyin Zhang, Jianlong Liu, Jinxin Wu, Weixuan Jiao (), Li Cheng and Mingbin Yuan
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Hongyin Zhang: College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225100, China
Jianlong Liu: Management Division of Qinhuai River Hydraulic Engineering of Jiangsu Province, Nanjing 210022, China
Jinxin Wu: College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225100, China
Weixuan Jiao: College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225100, China
Li Cheng: College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225100, China
Mingbin Yuan: College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225100, China

Agriculture, 2023, vol. 13, issue 9, 1-18

Abstract: A bulb tubular pump unit is a horizontal tubular pump unit composed of a water pump and bulb with an electric motor installed. Electric motors, transmission equipment, and bearings are usually placed in the bulb. The bulb is located in the flow channel and has a relatively narrow space. Therefore, the shape of the bulb has a significant influence on the flow pattern and pump efficiency in the flow channel. In this study, the CFX 19.2 software was employed to optimize the bulb hydraulically according to its geometry and parameters. The research results indicate that the flow pattern at the tail of the elliptical bulb was better, the hydraulic loss at the bulb section was small, and the device efficiency was higher than that at the tail, which was round. The streamlined support had small flow resistance, minimal hydraulic loss, and a high pump unit head and efficiency. Nine schemes were selected, and the geometrical characteristics and parameters of the bulb were determined as follows: the shape of the tail of the bulb was oval, the bulb ratio was 0.96, and the shape of the support parts was streamlined. The results hold important reference significance to improve efficiency and broaden the operating conditions of bulb tubular pump devices.

Keywords: bulb tubular pump; bulb form; optimization design; numerical simulation; hydraulic performance (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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