| 施卫东,张德胜,关醒凡,曹卫东.后置灯泡式贯流泵装置模型的优化与试验研究[J].水利学报,2010,41(10): |
| 后置灯泡式贯流泵装置模型的优化与试验研究 |
| Optimization and experimental investigation on post bulb type tubular pump device model |
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| DOI： |
| 中文关键词: 南水北调工程 贯流泵 水力模型 装置试验 数值模拟 优化设计 |
| 英文关键词: South-to-North Water Diversion Project tubular pump hydraulic model device experiment numerical simulation optimal design |
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| 摘要点击次数: 2044 |
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| 中文摘要: |
| 结合南水北调东线工程金湖泵站低扬程大流量工况要求，研制了贯流泵装置水力模型。采用标准k-ε湍流模型和SIMPLEC算法，对该模型进行了全流场数值模拟，并对叶片出口和导叶之间的距离进行了优化。优化结果表明，当叶片出口和导叶之间距离为0.11倍叶轮外径时，内部流动较稳定，装置效率高；当该距离为0.03和0.33倍叶轮外径时，导叶出口分别形成了脱流区和旋涡区。流线运动轨迹表明导叶出口存在一定的剩余环量，呈螺旋流态进入出水流道，没有出现局部旋涡。优化后的装置模型经过3个不同试验台的试验，结果基本相符。试验结果表明，该模型流量大，效率高，在-4°叶片角下，最高效率达到79.40%；在2.92 m扬程下，流量为329L/s，汽蚀比转速为1 267，效率达到79.15%，该模型可供南水北调工程及其他工程选用。 |
| 英文摘要: |
| The low head and large flow rate condition is requested in Gold Lake Pumping Station in the East Route of South-to-North Water Diversion Project，and the numerical study on optimization and hydrau?
lic model test on the tubular pump for this pumping station were carried out. The flow regions including inlet，rotor，and guide-vane and outlet channel were simulated based on standard k - ε turbulence model and SIMPLEC arithmetic，and the matching relation between rotor and guide-vane was optimized. The numerical results show that the device model has a steady flow and high efficiency when the distance between blade exit and guide-vane inlet equals 0.11 diameter of impeller. The results of model test show that the efficiency of the tubular pump reaches 79.40% at blade angle of -4°. At the condition of water head equal to 2.92m，its flow rate reaches 329 L/s，efficiency reaches 79.15%，and the cavitations specific speed reaches 1267. The device has obvious advantages when the operating head is less than 3m. |
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