商用车冷却系统匹配研究

Matching of Cooling System for Truck

文章利用CFD软件对某商用车进行商用车冷却系统分析,并对分析车辆进行风洞试验。通过试验很好的验证了仿真的准确性,对比表明仿真的结果误差能够控制在6%以内,因此在一定条件下仿真可以代替部分试验,实现商用车冷却系统的快速匹配。通过仿真可以看出影响发动机热平衡温度的因素主要有热风回流,阻挡和合理气流流动。发动机热平衡温度的变化随环境温度的变化并不是线性关系,虽然符合"水涨船高",但环境温度越高,其发动机热平衡温度变化越大。

This paper presents a simulation of the cooling system of a truck with CFD. Also a thermal balance wind tunnel test is done. The simulation and test error can be control in 6%,so simulation can replace some test in the condition. It shows that there are 3 main factor which influence the thermal balance, they are circumfluence, block and flow.Temperature of the thermal balance increases along with environment non-linear.