基于RANS算法的整车热平衡分析与结构优化  

Thermal balance analysis and structural optimization of vehicle based on RANS algorithm

作　　者：杜宪 荆磊 谢超 耿文龙 DU Xian;JING Lei;XIE Chao;GENG Wenlong(Department of Automotive Engineering,Beijing Vocational College of Transport,Beijing 100096,China;Department of CAE,BAIC Group Off-road Vehicle Co.,Ltd.,Beijing 101300,China)

机构地区：[1]北京交通运输职业学院汽车工程系,北京100096 [2]北京汽车集团越野车有限公司CAE部,北京101300

出　　处：《计算机辅助工程》2025年第1期25-30,共6页Computer Aided Engineering

基　　金：北汽集团B41V换代开发项目(UP6UN6PT6.ICV6)。

摘　　要：基于RANS算法和水-气双流模型,对某车型的整车机舱模型进行热平衡仿真,得到机舱冷却液温度和机舱流场分布,并对其热平衡性能进行预测。整车热平衡热害试验对比可知试验值与仿真结果误差<6%,验证仿真模拟的准确性。为解决整车冷却液温度及机舱温度过高的问题,提出增加散热器下导流板的优化方案,优化方案可以使冷却液温度下降8.90℃。热平衡分析方法可以有效预测整车冷却系统能力及整车热平衡性能,为整车冷却系统改进提供参考。A thermal balance simulation of the engine compartment model of vehicle is conducted based on the RANS algorithm and water-air dual-flow model.The coolant temperature and flow field distribution within the engine compartment are obtained,and the thermal balance performance is predicted.Comparison through the thermal balance and heat damage test show that the error between the test and simulation is less than 6%,and the reliability of the simulation results is verified.To solve the problem of high coolant temperature and engine compartment temperature of vehicle,an optimization solution of adding a wind deflector to the radiator is proposed,the optimization solution can reduce the coolant temperature by 8.90℃.The method of thermal balance analysis can effectively predict the cooling system capacity and thermal balance performance of vehicle,which can provide reference for improvement of the vehicle cooling system.

关 键 词：RANS 热平衡 冷却系统 导流板 双流模型 

分 类 号：U461.1[机械工程—车辆工程] U464.138[交通运输工程—载运工具运用工程] TP391.99[交通运输工程—道路与铁道工程]