| 引用本文: | 金海银,张一祁,袁 尧,等.箱涵式双向立式泵装置性能试验与流场分析[J].灌溉排水学报,2021,(6):94-99. |
| JIN Yinhai,ZHANG Yiqi,YUAN yao,et al.箱涵式双向立式泵装置性能试验与流场分析[J].灌溉排水学报,2021,(6):94-99. |
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| 摘要: |
| 【目的】探究箱涵式双向立式泵装置性能与导叶体对泵装置效率的影响。【方法】以江苏省江边枢纽泵站的箱涵式双向立式轴流泵装置为研究对象，采用物理模型试验方法对箱涵式双向立式轴流泵装置模型开展了能量性能、汽蚀性能及飞逸性能试验，并采用数值模拟技术分析了泵装置内部流动特征。【结果】①排水工况设计扬程1.55 m时，叶片安放角-6°下箱涵式双向立式轴流泵装置的效率为57.24%。②引水工况设计扬程1.75 m时，叶片安放角-6°下箱涵式双向立式轴流泵装置的效率为60.77%。③在运行扬程1.75~3.95 m范围内，轴流泵的临界汽蚀余量均不超过8.0 m，满足最低淹没深度要求。【结论】经导叶体数值比选，在设计流量时采用扩散导叶体的泵装置效率高于采用直导叶体的泵装置。各工况时箱涵式双向进水流道内流场的前部流线平顺，在双向进水流道的盲端处，流速很小，表现为运动缓慢的回流区；出水侧的流态分布整体较为均匀，无不良流态出现。 |
| 关键词: 泵装置；轴流泵；性能；数值模拟；模型试验 |
| 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 |
