摘要
为了提高发动机舱散热性能,提升风扇效率,研究了冷却风扇导流罩对汽车冷却模块流动性能的影响.在整车环境下对某乘用车的发动机舱冷却模块进行了CFD仿真分析,对比了在有无风扇罩2种情况下发动机舱冷却模块的性能,并对具有几种不同过渡截面倾角的风扇导流罩进行了分析.结果表明:汽车低速行驶时,冷却模块中风扇导流罩对冷却空气有一定的引导作用,使得风扇在车速较低的工况中也能较好地起到压升作用,使冷却空气能够通过散热器,从而冷却动力系统和发动机舱;在汽车高速行驶时,冷却模块中风扇罩对冷却空气有一定的阻力作用,风扇导流罩过渡段倾角越大,气体由于气流偏转损失的能量就越小,可以提高风扇效率从而降低能耗.
To improve the engine cooling performance and the fan efficiency, the effects of fan cowl on the performance of cooling module were investigated. CFD was used to simulate the cooling module of passenger car, and the influence of fan cowl on automotive cooling module performance was discussed.Several schemes of fan cowls with different transition section angles were analyzed. The results show thatthe fan cowl has certain guiding role to air when the car drives slowly, which meffect on pressure increasing to ensure adequate cooling air through the radiator even atdriving speed. The fan can increase the resistance to cooling air when the car drives fast. With theincreasing of transition section angle of fan cowl , energy loss and pressure are decreased toefficiency and reduce energy consumption.
出处
《江苏大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2017年第3期260-266,共7页
Journal of Jiangsu University：Natural Science Edition
基金
上海市自然科学基金资助项目(15ZR1443100)
关键词
风扇导流罩
冷却模块
性能
整车环境
CFD模拟
fan cowl
cooling module
performance
underhood environment
CFD simulation
