| 欧阳平,刘 翔.湿定子潜水贯流泵装置全流场分析[J].江西水利科技,2019,(1): |
| 湿定子潜水贯流泵装置全流场分析 |
| Numerical simulation of flow in a diving tubular pump system with wet-winding stator |
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| DOI： |
| 中文关键词: 贯流泵 叶片角度 数值分析 流动特性 |
| 英文关键词: Tubular pump Mounting degree Numerical simulation Flow characteristics |
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| 中文摘要: |
| 江西萍乡鹅湖泵站采用了四台叶轮直径2 250mm的湿定子潜水贯流泵，为探究不同叶片安装角度对该泵的性能及内部流动的影响，选用了比转速ns=850的湿定子潜水贯流泵模型泵为研究对象，对不同叶片安装角度和不同流量下的泵装置进行内部全流场分析，并预测其性能.研究结果表明：叶片进口角度从0°变到+4°时，对于湿定子潜水贯流泵装置，稳定运行的工况下的扬程性能曲线上移，效率性能曲线右移，高效区变宽.蝶阀导致小漩涡的产生，影响管内流动；小流量工况下，水流在流经导叶的背面时出现了明显的脱流情况. |
| 英文摘要: |
| Four diving tubular pumps with wet-winding stator are used in the Ehu Lake pump station at Pingxiang in Jiangxi province.The diameter of the impeller is 2 250mm.In order to investigate the effect of blade at different angles on the flow，in this paper，a specific speed ns=850 tubular pump model is kept as the research object.Based on the 3D tuibulent Navier-Stokes Equation，the internal flow of the tubular pump with different blade mounting degree and different flow are simulated by using standard k-εturbulent model.The performance prediction of pump is also completed.The results show that，head curve in steady condition is displaced upwards and efficiency curve is displaced to right.The flow in pipe is influenced by butterfly valve.In state of low flow，flow separation occurs at back of guide blade. |
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