Abstract: In order to study the aerodynamic of different vehicle types in the flow field, ANSYS is used to build the modeling of sport utility vehicle (SUV) and recreational vehicle, which are imported into computational fluid dynamics (CFD) flow field analysis software to calculate and analyze the distribution laws of the pressure, medium flow rate and turbulent energy of sport utility vehicle (SUV) and recreational vehicle in two speeds (60 km/h, 80 km/h) driving conditions. It is found that the distribution laws of pressure, speed and turbulent energy in the flow field are roughly same under two conditions and pressure is easily occurred at the front of vehicles and the tires concentrated. Besides, the pressure, speed, and turbulent energy at a driving speed of 60 km/h are overall less than the that at 80 km/h. This study can be used as a reference for the optimization design of two-car vehicle models.

Key words: Sport utility vehicle; Recreational vehicle; Computational fluid dynamics (CFD) analysis of flow field; Turbulent kinetic energy

摘要： 为了研究不同车型在流场中的气动性，利用 ANSYS Workbench 对运动型多用途汽车 （SUV）及房车进行建模，并导入计算流体动力学（CFD）流场分析软件中进行计算，分析 两种速度（60 km/h、80 km/h）行驶工况下流场中运动型多用途汽车（SUV）及房车的压力、 介质流速以及湍流动能的分布规律，发现两种工况下压力、速度以及湍流动能在流场中分布 规律大致相同，两车的车头以及车胎处易发生压力集中。60 km/h 行驶速度下的压力、速度以 及湍流动能整体小于 80km/h 下的压力、速度以及湍流动能。此研究对两车的汽车车型优化设 计有参考意义。

关键词: 运动型多用途汽车；房车；计算流体动力学（CFD）流场分析；湍流动能