【摘要】 为研究车身造型对气动力的影响，根据人机工程相关参数，运用Rhino软件的非统一有理B样条(non-uniform rational B-splines, NURBS)建模技术，构建车身外形，并采用计算流体动力学方法对其外流场进行仿真，得到气动力特性。流场中气流始终附着在车身表面没有出现分离，表明车身造型合理，有利于减小气动阻力。针对尾部结构进行曲线再造，改进后的模型的气动阻力明显减小；附加尾翼和鸭尾造型气动升力减小，侧倾力矩减弱，有利于提高汽车对地面的附着力，提高稳定性，更适合于赛车。文中采用的方法可为设计符合汽车空气动力学特性的车身造型方案及风洞试验提供理论参考。更多还原

【Abstract】 In order to study the influence of the car body modeling on aerodynamic force, the body shape is constructed by using the NURBS modeling technology of Rhino software according to the relevant parameters of ergonomics. Its outflow field is simulated by computational fluid dynamics method to obtain the aerodynamic characteristics. In the flow field, the airflow always adheres to the body surface without separation. It indicates that the body shape is reasonable and conducive to reducing aerodynamic resistance. The curve reconstruction is carried out for the tail structure. The aerodynamic resistance of the improved model is significantly reduced. The aerodynamic lift of the additional tail wing and duck tail shapes is reduced, and the rolling moment is weakened, which is conducive to improving the adhesion of the car to the ground and improving the stability. They are more suitable for racing car. The method used in this paper can provide a theoretical reference for the design scheme of body shape and wind tunnel experiments in line with aerodynamic characteristics of car.更多还原