摘要
为缩短发动机冷却系统散热性能匹配设计开发周期,介绍了一种快捷、可靠地计算散热器性能参数的数值模拟方法。通过对散热器进行换热风洞试验研究,分析其在一定水流量条件下,换热功率、出水温度与迎面风速的关系。然后根据原始几何参数建立了散热器计算域物理模型,分别采用多孔介质模型和双流换热器模型表征散热器芯体翅片结构和热交换模型,采用CFD数值模拟方法对散热器冷、热侧耦合散热进行仿真分析,得到散热器换热功率和出水温度分析数据,并与试验数据进行对比,误差在以内,验证了此模拟计算方法的可靠性。
In order to shorten the development period of the engine cooling system heat dissipation performance matching design,a numerical simulation method was introduced for calculation the radiator performance parameters. Experiments on radiator were carried out in a heat transfer wind tunnel,the relation between heat dissipation power,the outlet water temperature and windward speed were analyzed under the certain condition of water flow. Then the computational domain physical model of the radiator was built according to the original geometric parameters,the porous media model and the dual stream heat exchanger model were adopted to represent the radiator core fin structure and the heat exchange model respectively,the cold and hot side coupling heat dissipation of the radiator was simulated using the CFD（Computational Fluid Dynamics） numerical simulation method to acquire the heat dissipation power and outlet water temperature analysis datum of the radiator,which were compared with the experimental datum to verify reliability of the simulation calculation method according to the results of error within 5%.
出处
《机械设计与制造》
北大核心
2015年第7期95-98,共4页
Machinery Design & Manufacture
关键词
车辆散热器
耦合散热
风洞试验
数值分析
计算流体动力学
Vehicle Radiator
Coupling Heat Dissipation
Wind Tunnel Experiment
Numerical Analysis
CFD
