摘要
乘用车前端进气对发动机舱内的流动和散热性能影响很大,文章基于三维数值分析软件Fluent建立了某乘用车三维数值模型,分析了原车型在爬坡工况下发动机舱内的流动和换热性能,发现在该工况下通过散热器的冷却空气流量偏低,未达到目标值。在分析原车型速度分布后,发现可以通过优化挡板以提高格栅和冷凝器之间的密封性能。验证结果表明,将散热器的冷却空气流量增加5%,散热器的换热量可提高4%,达到了预期的目标值,起到改善机舱散热性能、提高热管理水平的目的。
The vehicle under hood flow and thermal performance are influenced by FEAF.A three-dimensional simulation of fluid field is carried out by using the commercial CFD software Fluent.By grading the simulate grade flow condition,the radiator FEAF is found fail to meet the target.Based on original work,the velocity distribution is verified to optimize the baffle to improve FEAF.It is found that the FEAF with optimized baffle and radiator FEAF is increased by 5%,radiator heat transfer is increased by 4%,which can meet the target and improve under hood thermal performance.
作者
赵亚芳
尹章顺
ZHAO Yafang;YIN Zhangshun
出处
《上海汽车》
2019年第5期42-47,共6页
Shanghai Auto
