汽车并列行驶湍流数值模拟  

Numerical simulation on characteristics of turbulent flow around two cars driving side-by-side

作　　者：陈洪业[1] 王爱玲[1] 郑智贞[1] 管政[1] 郭超[1] 

机构地区：[1]中北大学山西省先进制造技术重点实验室,太原030051

出　　处：《机械设计与制造》2010年第4期196-197,共2页Machinery Design & Manufacture

摘　　要：采用通用计算流体力学软件FLUENT对并列行驶的汽车进行了湍流数值模拟,并对结果进行了处理与分析。以0.5倍车宽侧向间距的两辆汽车为典型算例,给出了汽车车身表面的速度和压力分布。重点对比了0.1、0.5、2倍车宽间距两车对称面上的压力分布情况。对比汽车侧向力系数分析说明过小的汽车侧向间距会使两车间产生大的侧向力,出现中心挤压趋势。为保证安全性和操控性,应保证两车侧向间距在0.5倍车宽以上。The characteristics of turbulent flow around two cars driving side-by-side is simulated using general purpose computational fluid dynamics （ CFD ）code FLUENT. Analyzes and discusses the results. Taking two car models driving side-by-side with a side space of a car as an example ,the velocity and pressure distributions on the car models surface were given. The pressure distributions on symmetric plane between 2 cars with the side space of O.l ,O.Sand 2 times of car width were compared. The analysis of the side force on the right car model showed that with the reducing side spaces ,the side forces push 2 cars to each other,and the safe side space should be 0.5 times of the car width at least for the driving and steering safety.

关 键 词：汽车空气动力学 CFD 并列行驶 

分 类 号：TH12[机械工程—机械设计及理论] O355[理学—流体力学]