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| DOI：10.13522/j.cnki.ggps.2020442 |
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| Performance Test and Flow Field Analysis of Box-type Bidirectional Vertical Pump |
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JIN Yinhai, ZHANG Yiqi, YUAN yao, YANG Fan
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1. Chengjiang Agricultural Water Management Service Station of Jiangyin, Wuxi 214400, China; 2. College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225127, China; 3. Jiangsu Hydraulic Science Institute, Nanjing 210000, China
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| Abstract: |
| 【Objective】Pumping station is an important component in hydraulic projects and its performance and efficiency are affected by many factors. This paper aims to investigate the performance of the box-type bidirectional vertical pump, as well as the influence of the guide vane body on its efficiency.【Method】The box-type bidirectional vertical flow pump system at the Jiangsu Riverside Hub Pumping Station was used in this study; physical model was used to test its energy performance, cavitation performance and flyaway performance. The flow characteristics inside the pump were analyzed using numerical simulation.【Result】①The efficiency of the box-type bidirectional vertical axial flow pump is 57.24%. ②When the vane placement angle is -6 degrees and water lift height is 1.75m, the efficiency of the pump is 60.77%. ③Within the range of operating water lift height, 1.75~3.95 m, the critical cavitation allowance of the axial flow pump does not exceed 8.0 m, meeting the requirement on minimum submergence depth.【Conclusion】Comparison of difference guide vane bodies showed that efficiency of the pump with a diffusion guide vane is higher than that with a straight guide vane. Under all operating conditions we tested, the front streamline in the flow field in box-type bi-directional intake channel is smooth; at the blind end of the bi-directional intake channel, the flow velocity is very small. On average, the flow distribution in the outlet side is relatively uniform, and there are no undesirable flow patterns in it. |
| Key words: Pump device; axial flow pump; performance; numerical simulation; model test |
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