| 离心泵非定常计算中叶轮转动位置对性能影响的数值模拟 |
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| 引用本文： | 刘建瑞,刘亮亮,张立胜.离心泵非定常计算中叶轮转动位置对性能影响的数值模拟[J].中国农村水利水电,2012(4):74-79. |
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| 作者姓名： | 刘建瑞 刘亮亮 张立胜 |
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| 作者单位： | 江苏大学流体机械技术研究中心,江苏镇江,212013 |
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| 摘 要： | 利用CFD软件,采用Realizable k-ε湍流模型,分别在3种工况下,对1台比转数为71的导叶-蜗壳组合式离心泵的内部流动进行三维非定常数值模拟,获取了离心泵内部流场结构,计算泵的扬程及效率。根据计算结果,分析了叶轮转动位置对泵外特性和内流场的影响。结果表明：当叶轮转动位置不同时,泵扬程、效率随之发生变化,选取某一特定位置处结果作为最终预测结果会产生较大的随机误差;叶轮转动位置的不同,也会对叶轮、导叶、蜗壳流道内的压力场和速度场产生一定的影响。
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| 关 键 词： | 数值模拟 导叶蜗壳组合式离心泵 叶轮转动位置 随机误差 |
A Numerical Simulation of Effect on the Performance of Impeller Position in the Unsteady Calculation of Centrifugal Pumps |
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| LIU Jian-rui,LIU Liang-liang,ZHANG Li-sheng.A Numerical Simulation of Effect on the Performance of Impeller Position in the Unsteady Calculation of Centrifugal Pumps[J].China Rural Water and Hydropower,2012(4):74-79. |
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| Authors: | LIU Jian-rui LIU Liang-liang ZHANG Li-sheng |
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| Institution: | (Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,Jiangsu China) |
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| Abstract: | Full three-dimensional numerical simulation of a volute-diffuser combined centrifugal pump are carried out by using CFD under 3 operating conditions.The Reynolds-averaged Navier-Stokes equations are solved with a turbulence model of Realizable k-ε.The flow pattern is obtained.The head and hydraulic efficiency of the pump are calculated.Based on these,an analysis is made of the effect of impeller rotating position.The results show that: The head and efficiency will change periodically along with the impeller rotating position,so selecting a specific location result as the final predicted result will have a greater random error.The pressure filed and velocity field of the impeller,diffuser and volute will also have some impact on the impeller rotating position. |
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| Keywords: | numerical simulation volute-diffuser combined centrifugal pump impeller rotating position random error |
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