第卷第期湖南大学学报自然科学版
3 9 4 ( ) ,
年月
2 0 1 2 4 Journal of Hunan University(Natural Sciences) 0 1 2
文章编号
:1674-2974(2012)04-0037-05
汽车发动机舱散热性能实验及数值研究*
任承钦,蔡德宏,刘敬平,樊明明
湖南大学汽车车身先进设计制造国家重点实验室湖南长沙
( , 410082)
摘要针对后置式汽车发动机舱过热问题以某混合动力汽车为研究对象运用
: , ,
数值耦合方法建立了发动机舱散热系统的耦合计算数值模型通过耦合数值计算
3D/1D , . ,
对不同环境温度和车速条件下的机舱发动机部件表面对流换热系数、机舱空间流量系数进
行了研究,总结了对流换热系数、流量系数的一般性规律,并拟合了相应的经验关系式,为发
动机冷却系统一维模型以及发动机舱的设计研究提供了参数依据和理论基础同时通过对
.
机舱热流场分析发现不同的机舱布置形式下对流换热系数和机舱流场有明显影响
, , .
关键词:流场;机舱;耦合模型;对流换热系数;流量系数
中图分类号文献标识码
:U461 :A
Experimental and Numerical Study of the Cooling
Performance of Automobile Engine Cabin
REN Cheng-qin,CAI De-hong,LIU Jing-ping,FAN Ming-ming
(State Key Laboratory of Advanced Design and Manufacture for Vehicle Body,Hunan Univ,Changsha,Hunan 410082,China)
Abstract:To cope with the problem of overheating of rear-mounted engine cabin,based on a type of
hybrid vehicle,a coupled model for the cooling system of rear-mounted engine cabin was established by u-
sing the coupling 3D/ the process of coupled calculation,the convection heat transfer
coefficient of engine surfaces and the flow coefficient of engine cabin in different ambient temperatures and
driving speeds were addition,the general laws of the heat transfer coefficient and the flow coef-
ficient were summarized and empirical equation
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