In order to study the performance law of a construction vehicle radiator under different working conditions and ensure its working stability, a 3D physical model of the vehicle engine cabin was built based on original drawings with the software UG NX7.0, in which a heat exchange module was adopted to represent the radiator group. Then, the engine cabin model in a virtual tunnel was simulated using the computational fluid dynamics ( CFD) numerical method, and the heat exchange performance of the radiator module was analyzed under various working conditions. Finally, the simulation results were verified experimentally- The results show that the heat exchange process has a gradient temperature change in each working condition, and increasing the temperature of the hot-air backflow will lower the radiator efficiency. When the radiator efficiency can not meet the need of the whole vehicle system, system overheating and performance instability occur. The error between simulation and experimental results is between 2.83% and 4.07%.%为了了解工程车辆散热器模块在不同工况下的性能变化规律,保证其工作稳定性,结合工程车辆的原始资料,在UG NX7.0软件中建立动力舱的三维物理模型.用热交换模型表征车辆散热器模块,采用CFD数值方法对虚拟风洞内的动力舱模型进行仿真,对各工况下散热器模块散热性能进行分析,并进行实验验证.结果表明:各工况下散热器内部热交换过程均呈现梯度变化；随着回流热空气温度升高,散热器的工作效率逐步降低.当其效率不能满足整车需要时,整车会出现系统过热以及工作性能不稳定现象.对比仿真与实验数据,两者误差在2.83％～4.07％之间.
展开▼
