叶片出口段形状对混流式核主泵叶轮能量性能影响  

Influence of different blade trailing edges on energy performance of impellers in a mixed-flow nuclear main pump

作　　者：杨敏官[1] 张永超[1] 周志伟[1] 王震[1] 高波[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《哈尔滨工程大学学报》2017年第2期230-234,共5页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(51476070);江苏高校优势学科建设工程资助项目

摘　　要：基于三维不可压缩流体N-S方程和Standard湍流模型,对混流式核主泵叶轮水力模型的能量性能进行了数值预测,研究了不同叶片出口段形状(传统叶片出口段、叶片工作面修圆、叶片工作面和背面同时修圆、叶片背面修圆)对混流泵模型叶轮水力性能的影响。通过分析叶轮叶片压力面、吸力面的静压分布,获得叶片表面的载荷分布及其变化规律。结果表明:对叶片出口段进行修圆,叶轮最高效率值有所增大且高效点向大流量工况偏移;当仅对叶片工作面进行修圆,叶轮水力性能最好,从而为核主泵的水力优化设计提供参考依据。Based on the three-dimensional incompressible Navier-Stokes equation and the standard K-e turbulent model,the energy performance of the impeller hydraulic model in a mixed- flow nuclear main pump was numerically predicted. In addition,the influence of different blade trailing edges （ traditional trailing edge,ellipse on pressure side,ellipse on both sides,ellipse on suction side） on the impeller hydraulic performance in a mixed-flow p u m p model was studied. By analyzing the static pressure on impeller blade surface and the suction side,the load distri-bution on the blade surface and the change law were attained. T he result shows that when the blade trailing edge is rounded,the highest efficiency value increases and efficient points offset the large flow rate conditions,w h e n only the leading face of the vane is rounded,the hydraulic efficiency value of impeller is highest. Then the referential basis for the hydraulic optimization design for a nuclear main pumpis provided.

关 键 词：核主泵 混流叶轮 水力性能 叶片出口段形状 

分 类 号：TH313[机械工程—机械制造及自动化]