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  • ISSN：0577-6686
机械工程学报

机械工程学报 ›› 2015, Vol. 51 ›› Issue (15): 53-60.doi: 10.3901/JME.2015.15.053

• 核电装备先进制造技术专栏 • 上一篇    下一篇

核主泵叶轮与导叶叶片数匹配规律的数值优化

杨从新1,2, 齐亚楠1, 黎义斌1,2, 王秀勇1,2, 程效锐1,2   

  1. 1.兰州理工大学能源与动力工程学院
    2.兰州理工大学甘肃省流体机械及系统重点实验室
  • 出版日期:2015-08-05 发布日期:2015-08-05
  • 基金资助:
    国家自然科学基金资助项目(51369015，51469013)

Numerical Optimization on Blade Number Matching Law of Impeller and Guide Vane in Reactor Coolant Pump

YANG Congxin1,2, QI Yanan1, LI Yibin1,2, WANG Xiuyong1,2, CHENG Xiaorui1,2   

  1. 1.School of Energy and Power Engineering, Lanzhou University of Technology
    2.Key Laboratory of Fluid machinery and Systems of Gansu Province, Lanzhou University of Technology
  • Online:2015-08-05 Published:2015-08-05

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摘要： 为了阐明核主泵叶轮和导叶叶片数匹配特性对水力性能的影响。以缩比系数为0.5的模型泵为研究对象，基于核主泵几何参数，建立叶轮叶片数Z1和导叶叶片数Z2的多种匹配方案，通过数值方法预测多种匹配方案下核主泵设计工况下的水力性能。结果分析表明：只改变叶轮叶片数时，随着叶轮叶片数的增加，叶轮与泵扬程的增加趋势逐渐变缓；只改变导叶叶片数时，导叶叶片数的选取对核主泵效率影响的最大差值为8.48 %。导叶和压水室内漩涡区和水力损失主要集中在以泵出口为起点沿叶轮旋转方向的半球形区域，且环形压水室的水力损失在总损失中所占比重最小为36.4%，表明环形压水室是核主泵水力损失最大的过流部件。根据多种叶片数匹配方案的结果分析，表明设计工况下核主泵叶轮与导叶叶片数的最佳匹配值为(Z1=4，Z2=9)、(Z1=5，Z2=12)、(Z1=6，Z2=11)和(Z1=3，Z2=7)，即导叶叶片数在叶轮叶片数的2倍附近且两者互质时，泵的水力性能达到最佳值。研究结果为核主泵叶轮和导叶叶片数的选取提供了理论依据。

关键词: 导叶, 核主泵, 匹配, 叶轮, 叶片数

Abstract: In order to clarify the effect of blade number matching between impeller and guide vane on the hydraulic performances of the reactor coolant pump (RCP), model pumps (at a scale =0.5) are studied. Many RCPs with different matching laws between the impeller blade number Z1 and the guide vane blade number Z2 are built based on the references and geometry parameters of the RCP. Then their performances are predicted by numerical simulation. After the performances are analyzed, results in the studies are as follows. When the impeller blade number increases with the other geometry parameters of the RCP constant, the heads of impeller and pump both tend to increase with increasing trend gradually slow. When the guide vane blade number increases with the other geometry parameters of the RCP constant, the best pump can make efficiency improve by 8.48% relative to the worst one. Vortices and hydraulic loss within the guide vane and circular casing are mainly concentrated in the hemisphere region which starts with the pump outlet and goes along the impeller rotation direction. The circular casing has more hydraulic loss than the other flow components in the RCP. And the hydraulic loss of circular casing at least accounts for 36.4% of the total hydraulic loss. What is more, at the designed condition, best blade number matching laws between impeller and guide vane are (Z1=4,Z2=9)、(Z1=5,Z2=12)、(Z1=6,Z2=11) and (Z1=3,Z2=7), namely the efficiency and head of the RCP get the best value on condition that the guide vane blade number is about double of the impeller blade number and the blade numbers are both relatively prime. In conclusion, the above results can provide reference for choosing blade numbers matching law between impeller and guide vane of the RCP.

Key words: blade number, guide vane, impeller, matching, reactor coolant pump

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