中国机械工程2011，Vol.22Issue(4)：474-478,483,6.
基于冷却系统数值模型的发动机舱流动阻力特性研究
Study on Drag Characteristics for Flow Field of Underhood Based on Numerical Model of Cooling System
摘要
Abstract
For the purpose of increasing the efficiency of cooling system and reducing the aerodynamic drag, a method of numerical model of cooling system instead of experimental model was proposed, which was applied to study the airflow characteristics of underhood coupling internal and external flow fields. The influence on internal drag of the underhood was studied fully. The results show that the influence of internal drag is notable on aerodynamic drag, which for the whole is about 10％. It will become bigger with the increase of speed of fan. The diversification is clear when speed of car is low, but the diversification is not clear when speed of car is high. The drag of cooling system will become bigger with the increase of speed of fan when the speed of car is constant and the drag of radiator is sensitive to speed of fan. The drag of cooling system will become bigger with the increase of speed of car when the speed of fan is constant and the drag of condenser is sensitive to speed of car.The simulation results agree well with the test data in the wind tunnel, which indicates numerical simulation for automotive aerodynamics characteristics is feasible.关键词
气动阻力/发动机舱/耦合数值计算/内流阻力/风扇转速/冷却系统阻力Key words
aerodynamic drag/ underhood/ coupling numerical analysis/ internal drag/ speed of fan/cooling system darg分类
交通工程引用本文复制引用
袁志群,谷正气,方遒,袁侠义..基于冷却系统数值模型的发动机舱流动阻力特性研究[J].中国机械工程,2011,22(4):474-478,483,6.基金项目
福建省教育厅B类科技项目(JB10150) （JB10150）
厦门市重大科技计划项目(3502Z20100080) （3502Z20100080）
国家自然科学基金资助项目(50975083) （50975083）
国家高技术研究发展计划(863计划)资助项目(2007AA04Z122) （863计划）
