基于RANS算法的整车热平衡分析与结构优化

打开文本图片集

中图分类号：U461.1；U464.138；TP391.99 文献标志码：B

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

DU Xian1， JING Lei2， XIE Chao2，GENG Wenlong

Department of Automotive Engineering，Beijing Vocational Collge of Transport，Beijing 10o096， China； 2. Department of CAE，BAIC Group Off-road Vehicle Co.，Ltd.，Beijing 10130O，China）

Abstract：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 8.90degreeC . 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.

Key words： RANS； thermal balance； cooling systerm； wind deflector； dual-flow model

0引言

为提升汽车整车的灵活性和竞争力，兼顾砂石、泥泞、高温、干湿热等恶劣工况，众多车企在汽车研发设计阶段就需要考虑整车冷却系统及热平衡性能。（剩余6917字）