某前置后驱车型发动机舱热管理优化
2021-08-04晓珍和昌静郭涛
晓珍 和昌静 郭涛



摘 要:本文基于某前置后驱车型整车开发,运用流体力学方法对该车型发动机舱进行流场分析、温度场分析,并根据分析结果提出优化发动机舱热管理的措施。通过仿真分析及实车验证结果表明,增加散热器和中冷器导风板、优化前格栅开口、增加下盖板导风板等热管理优化措施明显提高了冷却系统进风量、降低了变速器表面受热温度,成功解决了某前置后驱车型的热害问题。
关键词:发动机舱 热管理 仿真分析
Thermal Management Optimization of the Engine Compartment of a Front-rear-drive Vehicle
Huang Xiaozhen He Changjing Guo Tao
Abstract:Based on the development of a front-rear-drive vehicle, this paper uses fluid mechanics to analyze the flow field and temperature field of the engine compartment of a vehicle. According to the analysis results, measures to optimize the thermal management of the engine compartment are proposed. Simulation analysis and actual vehicle verification results show that thermal management optimization measures such as adding radiator and intercooler air deflector, optimizing the opening of the front grille, and increasing the lower cover air deflector significantly increase the air intake of the cooling system and reduce the transmission, and the heat damage problem of a front-rear-drive model is successfully solved.
Key words:engine compartment, thermal management, simulation analysis
1 引言
随着科技的发展与生活水平的提供,人们对汽车的动力经济性、舒服性、安全性等方面要求越来越高。无论从功能配置需求导致发动机舱内零部件的增加,或是人机空间、舒适性需求导致驾乘舱挤压发动机舱空间,还是造型流畅、风阻等方案要求压低机舱,发动机舱内布置的零部件越来越多,空间越来越紧凑,机舱散热挑战愈发增大。为了避免因机舱温度过高导致零部件工作温度过高缩短使用寿命,甚至引发自燃,在整车开发的前期,发动机舱的热管理研究十分必要。本文基于某前置后驱车型整车设计开发,发动机舱布置前期,利用STAR-CCM+软件对机舱进行流场及温度场分析,发现前端散热冷却模块进风量不足且存在高温热害区域,并针对问题提出解决方案,最后通过仿真分析及试验验证了方案的有效性,解决了机舱热害问题[1]~[3]。
2 仿真分析
某前置后驱车型匹配的发动机排气歧管位于……
