轿车会车时气动特性的数值模拟  

Numerical simulation of car aerodynamic characteristics when crossing each other

作　　者：张英朝[1] 李杰[1] 李玉虎[2] 胡兴军[1] 傅立敏[1] 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室,吉林长春130022 [2]上海大众汽车有限公司,上海200333

出　　处：《江苏大学学报（自然科学版）》2008年第2期119-122,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(60222207);国家“985”工程汽车科技创新平台项目;汽车动态模拟国家重点实验室开放基金资助项目

摘　　要：以标准的SAE1∶4模型为研究对象,应用数值模拟方法对轿车的瞬态会车过程汽车空气动力特性进行研究.使用湍流模型中对于瞬态项的离散化方法,结合计算流体力学中用于瞬态模拟计算的滑移网格技术,对瞬态会车过程中流场变化进行了数值模拟研究.在国家法规允许的1倍车宽横向间距的情况下,捕捉会车过程中单车的阻力系数、升力系数、侧向力系数的瞬态变化,针对流场剖面上的静压场、模型表面的压力场等进行分析,总结了会车过程汽车瞬态气动特性.The transient aerodynamic characteristics of SAE 1/4 standard vehicle model were studied for the cars crossing each other. With the method of transient computational fluid dynamics and the technology of sliding interface the transient flow field of crossing vehicles was simulated. Under the state law for the distance between the two crossing vehicles being one vehicle width equivalent, the vehicle drag, lift and side force aerodynamic coefficients were calculated. By analyzing the static pressure on the section plane of the flow field and the surface pressure distribution of the SAE model, the vehicle transient aerodynamic characteristics when crossing each other were summarized.

关 键 词：汽车空气动力学 计算流体力学 SAE模型 会车 瞬态气动特性 

分 类 号：U461.1[机械工程—车辆工程]