发动机轴流冷却风扇设计与流场测量  

Design and flow field measurement of axial-flow cooling fan for vehicle engine

作　　者：李春蓄 沙毅 胡雅文 傅阳 卢乐鹏 LI Chunxu;SHA Yi;HU Yawen;FU Yang;LU Lepeng(School of Mechanical and Energy Engineering,Zhejiang University of Science and Technology,Hangzhou 310023,China)

机构地区：[1]浙江科技学院机械与能源工程学院,杭州310023

出　　处：《流体机械》2021年第9期41-46,共6页Fluid Machinery

基　　金：国家自然科学基金资助项目(51677171);浙江省食品物流装备技术研究重点实验室开放基金项目(KF2016020yb)。

摘　　要：经过分析轴流风机翼型进出口速度三角形,阐明散热器作为前置平板导叶的发动机风扇流动特征。在研制465Q型发动机轴流风扇及发动机冷却系统仿真试验台基础上,通过调节8种风扇转速,测取了风扇轴功率、散热器正面和背面各15测点静压强及护风圈8测点总压强和静压强,经过计算获得了变转速风扇进气边和护风圈出口端速度分布。拟合出n-qv(转速-风量)、n-Pa(转速-轴功率)等经验公式,得出发动机轴流风扇变转速风量和轴功率近似满足相似理论比例定律等结论。By analyzing the inlet and outlet velocity triangles of the fan airfoil,the main flow characteristics of the engine fan with the radiator as the front flat guide vane were expounded.Based on the development of the axial-flow fan of 465Q engine as well as establishment of the engine cooling system test-bed for experimental research,the fan shaft power,the static pressure of each 15 measuring points on the front and back of radiator,as well as the total pressure and static pressure of 8 measuring points on the wind shielding ring outlet of radiator were measured by adjusting 8 kinds of fan rotational speed,and the variable speed velocity distribution on the inlet side of the fan and on the outlet of the wind shielding ring were obtained through calculations.By fitting,a few empirical formulas for n-qv(rotational velocity-flow),n-Pa(rotational velocity-power),etc.were obtained,and it is concluded that the variable speed fan’s rotational velocity-flow and rotational velocity-power performance conversion approximately meet proportion law of similar theory for fluid machinery.

关 键 词：轴流风机 发动机冷却风扇 变转速 流场测量 优化设计 

分 类 号：TH43[机械工程—机械制造及自动化]