汽车前端冷却模块空气侧热流场仿真与试验研究  

Airside Thermal Fluid Simulation and an Experimental Study of the Vehicle Cooling Module

作　　者：林铁平 林卉 戴澍凯 

机构地区：[1]广州汽车集团股份有限公司汽车工程研究院,广东广州511434

出　　处：《汽车工程学报》2014年第5期384-390,共7页Chinese Journal of Automotive Engineering

摘　　要：为了研究封闭部分格栅和加装底护板对前端冷却模块性能的影响以及散热器空气侧热流场仿真结果与试验数据的相关性,建立了某排气前置车型的详细机舱热管理分析模型,应用多孔介质模型和旋转参考坐标系(Moving Reference Frame,MRF)方法建立了换热器和散热风扇的计算模型,对前端冷却模块空气侧流场和热场进行仿真并将部分仿真结果与试验数据进行了比较。分析结果表明,封闭部分格栅和加装底护板均能增加中冷器进风量;散热器前风速平均值、前部和后部的温度平均值与试验值相比误差均小于10%;考虑局部高温辐射并与机舱热流场的耦合模拟能大大提高热分析精度。In order to study the influence of partly closing a grille and of adding an engine protection plate on the airflow perfbrmance fbr cooling, and also to present the correlationbetween experiment and the airside thermal fluid simulation of the radiator, a detailed model was built for underhood thermal management analysis, in which the porous media model and moving reference frame （MRF） method were applied to simulate the heat exchanger and the cooling fan. The airside thermal fluid simulation in the vehicle cooling module was performed and some results were compared with the experimental data. It is indicated that both partly closing a grille and adding an engine protection plate can increase the cooling airflow into the intercooler.The average values of the velocity magnitude in front of the radiator and the temperature on both sides are close to the test results with less than 10% errors. Considering the coupling between local thermal radiation and the underhood airflow field can greatly improve the accuracy of thermal analysis.

关 键 词：发动机舱 热管理 冷却模块 热流场 热辐射 

分 类 号：U461.1[机械工程—车辆工程] U467.13[交通运输工程—载运工具运用工程]