汽车冷却水泵叶轮多参数对其外特性影响分析  

Impact of Impeller Parameters on Performance of an Automobile Cooling Pump

作　　者：张婷婷[1] 袁寿其[1] 刘建瑞[1] 张金凤[1] 裴冰[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013

出　　处：《汽车工程学报》2013年第2期100-105,共6页Chinese Journal of Automotive Engineering

基　　金：国家杰出青年科学基金(50825902)

摘　　要：针对比转速ns=59的汽车冷却水泵，选择对性能影响较大的叶轮的6个水力参数β2、b2、D2、Z、D0、φ，并添加了一个附加的辅助因素e，选取两个水平，设计了L8（2^7）7因素2水平的正交表，即8个叶轮设计方案。将泵内部流体划分为进口、叶轮以及泵体和出口3个区域，运用ICEM软件对8个方案的三部分水体分别划分网格，并通过ANSYS-CFX12．1软件分别对8个方案水泵的全流场进行定常数值模拟，得出8个方案的外特性曲线，以及4个方案在设计流量点处中截面上的静压分布图，找出了8个叶轮方案中性能最优的两个。分析得到了因素水平和因素对性能指标的影响主次顺序，得出了叶轮水力参数的最佳组合方案。结果表明采用L8（2^7）正交表可以简化参数对水泵性能影响的研究方法，再由计算流体动力学（Computational Fluid Dynamics，CFD）技术确定水力参数，在此基础上进行模型制造和外特性试验，可缩短产品研发周期，提高工作效率。This paper listed six impeller hydraulic parameters which may have effects on the performance of an automobile cooling pump with the specific speed ns=59. Two levels were chosen with another auxiliary factor e added to the factors. According to the orthogonal table L8 （2^7）, eight kinds of impellers were designed. The water in the pump was divided into three parts which are inlet, impeller and volute with outlet and mesh was generated by ICEM software. The steady flow of the eight kinds of pumps was studied by numerical simulation using ANSYS-CFX12.1 and the external characteristic curves were obtained. Pressure distributions in cross section at the design flow points for four pumps were calculated and the best two of the eight pumps were found. The order of influencing factors on performance and factor levels were analyzed, and the best combination of the parameters was obtained. The result shows that using orthogonal table L8 （2^7） can simplify the analysis of the influencing parameters on performance. After the hydraulic parameters are determined by CFD, the model manufacturing and external characteristic test will shorten the development period and improve work efficiency.

关 键 词：汽车冷却水泵 叶轮水力参数 L_8(2~7) 因素水平 计算流体动力学(CFD) 

分 类 号：TH311[机械工程—机械制造及自动化]