| 轴伸贯流泵压力脉动特性及其改善方法 |
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| 引用本文： | 刘志强,张玉全,戴庆云,郑源,吴东磊,韦雯倩.轴伸贯流泵压力脉动特性及其改善方法[J].排灌机械工程学报,2022,40(1):8-14. |
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| 作者姓名： | 刘志强 张玉全 戴庆云 郑源 吴东磊 韦雯倩 |
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| 作者单位： | 1.河海大学能源与电气学院, 江苏 南京 210098; 2.江苏省秦淮河水利工程管理处, 江苏 南京 210098 |
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| 基金项目： | 江苏省水利科技项目(2018026,2019018,2020025)。 |
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| 摘 要： | 为研究轴伸贯流泵压力脉动特性及其改善方法,应用计算流体动力学数值方法,采用在出水流道内增设导流板的方式进行贯流泵优化设计,并结合真机试验验证了数值计算方法的正确性.研究结果表明:在小流量工况下,原模型与优化模型泵的压力脉动时域特性和频域特性较额定工况下要差,但不同流量工况下叶轮进口处压力脉动特性均受到旋转叶轮显著影响;...
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| 关 键 词： | 轴伸贯流泵 压力脉动 导流板 涡带 数值模拟 |
| 收稿时间： | 2020-10-28 |
Pressure pulsation characteristics and improvement methods of axial extension tubular pump |
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| LIU Zhiqiang,ZHANG Yuquan,DAI Qingyun,ZHENG Yuan,WU Donglei,WEI Wenqian.Pressure pulsation characteristics and improvement methods of axial extension tubular pump[J].Journal of Drainage and Irrigation Machinery Engineering,2022,40(1):8-14. |
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| Authors: | LIU Zhiqiang ZHANG Yuquan DAI Qingyun ZHENG Yuan WU Donglei WEI Wenqian |
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| Institution: | 1. School of Energy and Electrical Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2. Qinhuai River Water Conservancy Project Management Office, Jiangsu Province, Nanjing, Jiangsu 210098, China |
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| Abstract: | In order to study the pressure pulsation characteristics of the axial extension tubular pump and its improvement methods,the CFD numerical simulation was applied to optimize the design of tubular pump by adding a deflector in the outlet channel,and the correctness of the numerical calculation method was verified by real machine test.The results show that the pressure pulsation and frequency domain characteristics of the original model and the optimized model pump under small flow conditions are worse than those under the rated conditions,but the pressure pulsation characteristics at the impeller inlet under different flow conditions are significantly affected by the rotating impeller.The pressure pulsation changes strongly under small flow conditions.The low-frequency components of the pressure pulsation at the impeller outlet and the rear guide vane outlet of the original model are obvious.The addition of a deflector can effectively reduce the variation pressure pulsation amplitude and low-frequency components at these two places.Under rated conditions,the periodic law of pressure pulsation is significant,and the deflector can effectively reduce the pressure pulsation amplitude and low-frequency components at the front guide vane inlet and the impeller inlet.Under different flow conditions,the vortex elimination affected by the deflector in the outlet flow channel is very significant. |
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| Keywords: | axial extension tubular pump pressure pulsation deflector vortex numerical simulation |
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