后视镜造型对前侧窗气动噪声的影响  

Effect of rearview mirror modeling on aerodynamic noise of front window

作　　者：陈鑫[1] 王宁[1] 沈传亮[1] 冯晓[1] 杨昌海[1] CHEN Xin;WANG Ning;SHEN Chuan-liang;FENG Xiao;YANG Chang-hai(State Key Laboratory of Automobile Simulation and Control,Jilin University,Changchun 130022,China)

机构地区：[1]吉林大学汽车仿真与控制国家重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》2020年第2期426-436,共11页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家重点研发计划项目(2016YFB0101601-7);吉林省科技发展计划项目(20160101283JC);吉林省省校共建项目(SXGJSF2017-2-1-5).

摘　　要：前侧窗区域的气动噪声主要来源于车外后视镜,为降低此区域的气动噪声,基于后视镜-平板风洞实验,对5款后视镜进行数值模拟研究。稳态分析采Realizable k-ε模型,瞬态分析采用基于Realizable k-ε模型的分离涡模拟(DES),此数值模拟方法监测的噪声数据与风洞实验结果基本一致。对比分析了5款后视镜平面流线图、表面声功率图和压力云图等,得出后视镜镜罩、基座造型、安装角度等造型因素对前侧窗区域气动噪声影响较为明显,适当调整组合这些造型因素,可有效减小后视镜对前侧窗气动噪声的影响,对后视镜结构的优化设计有较好的借鉴意义。The aerodynamic noise in the front window area mainly originates from the exterior rearview mirrors. To reduce the aerodynamic noise in this area,numerical simulations of five rearview mirrors were carried out based on the rearview mirror-plate wind tunnel experiment. The realizable k-ε model was used for steady-state analysis,and the separation vortex simulation was based on the realizable k-ε model for transient analysis. The noise data monitored by this numerical simulation method was basically consistent with the wind tunnel experiment results. The plane streamline diagrams,surface acoustic power diagrams and pressure cloud diagrams of the 5 rear-view mirrors are analyzed and compared. The shape factors that affect the aerodynamic noise of the front window area,such as mirror cover,base shape and installation angle are summarize. Results suggest that adjusting and combining these modeling factors properly can effectively reduce the influence of the rearview mirror on the aerodynamic noise of the front side window,which provides a good reference for the optimal design of the rearview mirror.

关 键 词：车辆工程 气动噪声 车外后视镜 数值模拟 造型因素 

分 类 号：U463.85[机械工程—车辆工程]