汽车发动机舱散热组件布局仿真优化  

Simulation and Optimization of Cooling Assembly Arrangement in Vehicle Engine Compartment

作　　者：刘传波[1] 鲁力[1] 莫易敏[1] 李鹏[1] 杨宇[1] Liu Chuanbo;Lu Li;Mo Yimin;Li Peng;Yang Yu(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070)

机构地区：[1]武汉理工大学机电工程学院,武汉430070

出　　处：《汽车工程》2018年第3期245-250,258,共7页Automotive Engineering

基　　金：国家973计划项目(2013CB632505)资助

摘　　要：鉴于由冷凝器、散热器和冷却风扇组成的汽车散热组件的布置直接影响整车的散热性能,本文中以提升进风量为目标,对某车型的冷凝器、散热器和冷却风扇三者间的距离关系进行优化。首先采用计算流体力学仿真,比较了冷凝器单独前移和冷凝器与散热器一同前移两种方案,发现后一种方案能更好地提升散热组件的进风量。然后采用正交试验方法,对冷凝器、散热器和冷却风扇的间距进行优化,获得散热组件的最佳布置方案。最后实车试验验证结果表明,与原车相比,优化后工况Ⅰ和工况Ⅱ下的散热器进风量分别提高了29.95%和4.54%,改善了整车的散热性能。In view of that the arrangement of vehicle cooling assembly,consisting of condenser,radiator and cooling fan,has direct effects on the heat dissipation performance of vehicle,an optimization on the distance relationship among condenser,radiator and cooling fan of a vehicle is conducted with increasing air flow rate as objective in this paper.Firstly two schemes,i.e.the moving forward of condenser alone and the moving forward of both condenser and radiator together,are compared by computational fluid dynamics simulation,indicating that the latter scheme can better increase the air flow rate of cooling assembly.Then orthogonal experiment method is adopted to optimize the distance relationship among condenser,radiator and cooling fan,with the best arrangement scheme of cooling assembly obtained.Finally the results of real vehicle test verification show that compared with original vehicle,the air flow rate of radiator with optimized arrangement scheme increases by 29.9 5%and 4.5 4%respectively for condition I and condition II,improving the heat dissipation performance of vehicle.

关 键 词：发动机舱 散热组件 空气流场 进风量 正交试验优化 

分 类 号：U464[机械工程—车辆工程]