非光滑车表的空气阻力特性  

Aerodynamic Drag Features on Automobile with Non-smooth Surfaces

作　　者：王耘[1] 谌可[1] 张友国[1] 宋小文[1] 

机构地区：[1]浙江大学机械工程学系,浙江杭州310027

出　　处：《同济大学学报（自然科学版）》2013年第4期571-576,共6页Journal of Tongji University:Natural Science

基　　金：浙江省科技厅重点科技创新团队项目(2010R50045)

摘　　要：基于仿生思想,将自然界中普遍存在的非光滑表面形态应用到汽车车身,利用计算流体力学数值模拟方法,研究采用非光滑车表减小汽车空气阻力的可行性.从汽车空气阻力的组成入手,通过对比光滑车表与非光滑车表汽车的外流场,分析非光滑车表对汽车压差阻力、诱导阻力、摩擦阻力的影响以及减阻机理.The form of non-smooth surfaces, which is ubiquitous in nature, is applied to automobiles and the feasibility of aerodynamic drag reduction on automobiles is studied by using computational fluid dynamics （CFD） simulation method. Meanwhile, by studying the composition of the air resistance and comparing the external flow field of automobiles with smooth or non-smooth surfaces, the effects of automobile with non-smooth surfaces on pressure drag, induced drag and frictional drag are analyzed together with the mechanism of drag reduction.

关 键 词：汽车 计算流体力学 非光滑 空气阻力系数 减阻 

分 类 号：U461.1[机械工程—车辆工程] TB17[交通运输工程—载运工具运用工程]