某车型外流场特性的数值仿真研究  

Numerical Simulation of the External Airflow Around a Car

作　　者：饶紫微 乔维高[1] 杨松[1] 司豪杰[1] 

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室汽车零部件技术湖北省协同创新中心,武汉430070

出　　处：《武汉理工大学学报（交通科学与工程版）》2014年第2期450-453,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：将SIMPLE算法与RNGk-ε湍流模型相结合,基于计算流体动力学完成了某车型外部流场的数值仿真.仿真计算的求解区域采用非结构化四面体网格进行离散,以速度进口、压力出口为边界条件,着重对该车型整车、中截面的流线、速度场、压力场及宽频气动噪声的声功率级分布进行了对比分析.仿真结果表明,外流场中沿车身外形的大幅度压力脉动是气动噪声的主要来源之一.Numerical simulation of the external airflow around a car has been performed. The SIMPLE method and the RNG κ-ε turbulent model have been selected to solve the three-dimensional equations. The unstructured grids have been used to discrete the computational domain. Velocity and pressure boundary conditions have been specified to the inlet and the outlet. The distributions of the stream- line, velocity, pressure and aerodynamic noise on the car surface have been analyzed. The simulation results show that the pressure fluctuation around the car is the main cause that results in the aerody-namic noise. The simulation results are of important significance to the optimal design and noise con-trol of the car.

关 键 词：空气动力 外流场 计算流体动力学 数值模拟 

分 类 号：U463.82[机械工程—车辆工程]