不同叶轮形式对汽车冷却水泵性能的影响  

Influence of Different Impeller Structure on the Performance of Engine Cooling Water Pump

作　　者：张启华[1] 杨欣叶 徐媛晖 曹丽 闫召旭 ZHANG Qi-hua;YANG Xin-ye;XU Yuan-hui;CAO Li;YAN Zhao-xu(Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang 212013,China;Shanghai Xingfu Motorcycle Co.Ltd.,Shanghai 201900,China)

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 [2]上海幸福摩托车有限公司,上海201900

出　　处：《流体机械》2018年第7期27-31,8,共6页Fluid Machinery

基　　金：国家自然科学基金资助项目(51309118);江苏省"六大人才高峰"(2015-ZBZZ-016);江苏大学高级人才启动基金资助项目(11JDG085)

摘　　要：为分析不同叶轮形式对汽车冷却水泵性能的影响,针对某一汽车水泵,分别设计了开式和闭式2种不同形式的叶轮,采用Fluen软件对叶轮内部流动进行全流场三维数值模拟,并选取闭式叶轮进行试验验证,证实了模拟结果的可靠性。试验结果表明,采用闭式叶轮效率更高。数值模拟结果表明,2种叶轮内部静压从进口至出口都逐渐升高,但开式叶轮入口处存在明显的低压区,易发生汽蚀。且在开式叶轮内部存在明显的漩涡和回流,闭式叶轮内部流动更稳定流畅。可见,叶轮形式对于水泵性能有较大的影响,采用闭式叶轮有利于提高该汽车冷却水泵的水力性能。In order to analyze the influence of different impeller structure on the performance of engine cooling pump,an unshrouded and a shrouded impeller were designed respectively for an engine cooling pump.The full 3D flow simulations were conducted for internal flow of impeller using Fluent 6.2 for these two configurations.And the shrouded impeller was chosen for test verification,and the reliability of the simulation results was validated.The test results show that,the hydraulic efficiency of shrouded impeller is higher.The numerical simulation results show that the static pressures in both impellers increase from inlet to outlet gradually,but there is an obviously low pressure area at the inlet of the unshrouded impeller,which is liable to cavitation.On the other hand,there are remarkable vortex and secondary flows in the unshrouded impeller,whereas the flow in the shrouded impeller is more stable.So it can be seen that,the structure of impeller has greater influence on the pump performance,therefore,use of shrouded impeller is more helpful to improvement of hydraulic performance of the engine cooling pump.

关 键 词：冷却泵 叶轮 开式 闭式 性能 

分 类 号：TH311[机械工程—机械制造及自动化]