基于CFD的三维轿车车流场的数值计算与应用分析

本文以计算流体力学（CFD）为基础，采用有限体积法探求了应用计算流体力学（CFD）研究汽车车身外部流场的可行性。计算机数值解提供了诸如：气动压力场、速度场等车身压力、速度分布以便于获得气动阻力、气动升力和气动侧向力及其由此可得的相关力等信息。三维理想轿车车身空气动力学特性参数的数值模拟结果与风洞实验数据吻合较.好进一步应用于实车分析表明：数值模拟研究汽车空气动力学特性切实可行。

Numerical Computation of Flow-field of 3-D Car Bodies and Application Analysis Using CFD

On the basis of computational fluid dynamics (CFD), the limited volume method was used to find out the possible benefits of such techniques as CFD. For such techniques to be of use within the automotive design process, the solutions must provide useful aerodynamic information, such as the field of pressure and velocity that is the distribution on the body of the vehicle, so as to be successfully integrated into the design process. The simulation results of and ideal ghree-dimensional car are in good agreement with the test data from the wind tunnel. The similar analysis was applied to two common cars. This indicated that numerical investigation of automotive aerodynamic characteristics is feasible and realistic.