基于CFD仿真的车辆散热器模块传热性能对比分析  

Comparative Analysis of Heat Exchange Performance of Vehicle Radiator Based on CFD Numerical Simulation

作　　者：刘佳鑫[1] 秦四成[1] 徐振元[1] 张奥[1] 习羽[1] 张学林[1] 

机构地区：[1]吉林大学机械科学与工程学院,吉林长春130025

出　　处：《华南理工大学学报（自然科学版）》2012年第5期24-29,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50775096)

摘　　要：为了解影响车辆散热器模块性能的因素,保证车辆工作的可靠性,依据原始资料建立了车辆动力舱物理模型,用热交换模型表征车辆散热器模块.将动力舱模型置于虚拟风洞内,采用计算流体动力学方法对模型进行典型工况仿真分析,并与相应的实验数据进行对比,验证仿真结果的正确性.结合另一种常用的动力舱布局方式建立模型,将两模型的仿真结果进行对比,发现:散热器内部冷空气温度变化呈现梯度特征;规则的动力舱几何特征可以有效地增强动力舱的空气流动性,当配合侧置的散热器组后能够提高散热器的工作性能.In order to find the main factors that play an important role in vehicle radiator performance and vehicle reliability, a physical model of the vehicle engine cabin is set up according to the original data, and a heat ex-change model is established to describe the radiator module. Then, a virtual tunnel is adopted to perform a compa-rative analysis under typical working conditions with CFD （Computational Fluid Dynamics） numerical simulation, and the simulated results accord well with the experimental ones. Moreover, a new physical model is established according to another popular engine cabin arrangement, which is compared with the former through simulation. It is found that there is a temperature gradient of cold air inside the radiator, that the flowability of the air improves in regular engine cabin, and that the engine cabin with side-sited radiators is of higher heat exchange performance.

关 键 词：车辆散热器 计算流体动力学 数值分析 动力舱 虚拟风洞 热交换 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]