空气动力套件对汽车气动性能影响的研究

The Study of Aerodynamic Performance of Cars with Aerodynamic Kit

随着计算机技术不断地高速发展,在越来越多的汽车以及车身附件的开发设计过程中运用了计算流体力学(CFD)方法。以计算流体力学为理论基础,以简化处理后的某型SUV模型作为研究对象,以CATIA、ICEM-CFD以及ANSYS-FLUENT作为研究工具对汽车的气动性能进行研究。通过仿真计算得到了原始模型和三种加装气动套件模型的车身阻力系数和升力系数。综合动力性、经济性、稳定性对计算结果进行对比,分析了加装不同气动套件汽车的气动性能差异以及产生这些差异的主要原因,并根据不同需求选出合适的加装方案。

With the endlessly high-speed development of the computer technology,computational fluid dynamics is applied during the processes of development and design of cars and body accessories. Based on the theory of computational fluid dynamics,the aerodynamic performances of a simplified SUV model were studied with CATIA,ICEM-CFD and ANSYS-FLUENT. The aerodynamic performances of models were obtained through the simulating calculation and compared through power,economy and stability. At the same time,analyzed the differences of aerodynamic performances of cars with different devices and why such differences could have happened,then chose the suitable devices.