侧风下汽车会车气动特性数值分析  

Numerical analysis on the aerodynamic characteristic of vehicles passing each other under the crosswind

作　　者：罗建斌[1] 吴量 苗明达 黄煜 LUO Jianbin;WU Liang;MIAO mingda;HUANG Yu(Guangxi Key Laboratory of Automobile Components and Vehicle Technology(Guangxi University of Science and Technology),Liuzhou 545006,China)

机构地区：[1]广西车辆零部件与整车技术重点实验室(广西科技大学),广西柳州545006

出　　处：《广西科技大学学报》2018年第2期31-36,共6页Journal of Guangxi University of Science and Technology

基　　金：广西教育厅2014年度高等学校科研项目(YB2014204);广西重点实验室建设项目子课题(14-A-01-03);广西工学院博士基金项目(院科博13Z10)资助

摘　　要：自然风与汽车会车工况的耦合会恶化汽车外流场,导致汽车所受气动力的变化.因此,对侧风下会车的气动特性研究具有一定的现实意义.本文采用滑移网格技术对侧风下等速会车的气动特性进行了数值分析.数值结果表明:由于气动干扰,侧风下会车的两车气动阻力和侧向力均产生了复杂的变化,对侧向力的影响更加剧烈.简化的二维数值模拟与真实的会车会有一定的偏差,但仍可为后续的真实车体会车的气动分析提供参考.The natural wind coupled with the passing conditions will often worsen the outflow field of the automobile and it will cause the change of the aerodynamic force on the automobile.So,it is significant to study the aerodynamic characteristic of the passing vehicles under the crosswind.Using the sliding mesh technology,the numerical analysis has been carried out on the aerodynamic characteristic of the passing cars in the same speed under the crosswind.The numerical results indicate that the aerodynamic dragging force and side force of two vehicles have been changed because of aerodynamic interruption and the impact on side force is more violent.The simplified two dimension numerical simulation will have certain deviation with the realistic passing conditions,but it can still offer some reference for the following aerodynamic analysis on the real bodies passing each other.

关 键 词：汽车会车 侧风 气动特性 数值分析 气动干扰 

分 类 号：U270.1[机械工程—车辆工程] U271.91[交通运输工程—载运工具运用工程]