后视镜罩边缘结构对流场和气动噪声的影响

陈鑫; 王怀玉; 高长凤; 张武; 谢晨

后视镜罩边缘结构对流场和气动噪声的影响

吉林大学汽车工程学院汽车仿真与控制国家重点实验室, 长春 130025

基金项目:

国家自然科学基金（51175214）；国家“十二五”科技支撑计划（2011BAG03B02-1）

详细信息

作者简介:
陈鑫（1974- ），男，辽宁辽阳人，副教授，博士，主要从事车身设计及轻量化技术、汽车NVH分析与控制研究.

中图分类号: V211.3;U461.1
计量
- 文章访问数: 1312
- HTML浏览量: 9
- PDF量: 827
- 被引次数: 0
出版历程
- 收稿日期: 2013-09-06
- 刊出日期: 2014-05-28

Effect of rearview mirror edge structure on flow field and aerodynamic noise

State Key Laboratory of Automotive Simulation and Control, College of Automotive Engineering, Jilin University, Changchun 130025, China

摘要

摘要: 采用大涡模拟（LES）的计算方法，对车外后视镜不同边缘结构引起的外部流场和镜后车身表面监测点处的气动噪声进行了数值仿真.研究表明：不同的镜罩边缘结构在较大程度上影响了流经后视镜罩的气流速度和流线方向，对后视镜后部流场和监测点处声压级产生较大影响.相较于原模型的光滑边缘结构，模型1后部流场涡团更远离车身表面，有利于降低气动噪声，某监测点1/3倍频程中心频率处声压级最大降幅接近10dB；模型2后部流场涡团产生分离，并更靠近车身表面，反而使气动噪声增大.模型1的镜罩边缘结构改进方案对车外后视镜-A柱区域的流场和气动噪声都有较好的改善.
- 后视镜 /
- 大涡模拟(LES) /
- 气动噪声 /
- 流场 /
- 边缘结构
Abstract: Numerical simulation of exterior flow field and aerodynamic noise caused by different rearview mirror edge structures was conducted by the large eddy simulation(LES). The results show that various mirror cover edge structures have an effect on the airflow velocity and direction, affecting greatly the rear flow field of rearview mirror and sound pressure level at monitoring point. Compared with the original model, the vortex flow behind model 1 is farther away from the body surface, helping to reduce aerodynamic noise. Sound pressure level drops by almost 10dB in 1/3 octave center frequency at a monitoring point. The vortex flow behind model 2 is separated and located nearer to the body surface, leading to rise of aerodynamic noise. The mirror cover edge structure of model 1 improves the flow field and aerodynamic noise around the rearview mirror and A-pillar.
- rearview mirror /
- large eddy simulation(LES) /
- aerodynamic noise /
- flow field /
- edge structure

HTML

参考文献(15)

[1]	Ye L, Naohiko K, Hiroyuki T, at al.Evaluation of wind noise sources using experimental and computational methods[R].SAE Technical Paper 2006-01-0343, 2006.
[2]	王志亮, 刘波, 桑建兵, 等.汽车风噪声产生机理研究[J].拖拉机与农用运输车, 2008, 35(6):35-40. WANG Zhiliang, LIU Bo, SANG Jianbing, et al.Mechanism research of automobile wind noise generation[J].Tractor and Farm Transporter, 2008, 35(6):35-40.(in Chinese)
[3]	Chen K H, Johnson J, Dietschi U, et al.Automotive mirror wind noise simulations and wind tunnel measurements[C]//Proceedings of the 14th AIAA/CEAS Aeroacoustics Conference.Vancouver:American Institutue of Aeronautics and Astronautic, 2008:1-13.
[4]	李启良, 杨志刚, 王毅刚.汽车后视镜气动噪声的影响参数[J].同济大学学报:自然科学版, 2011, 39(8):1204-1207. LI Qiliang, YANG Zhigang, WANG Yigang.Influence parameters of aerodynamic noise for automotive rear view mirror[J].Journal of Tongji University:Natural Science, 2011, 39(8):1204-1207.(in Chinese)
[5]	任露泉, 王再宙, 韩志武.仿生非光滑表面滑动摩擦磨损试验研究[J].农业机械学报, 2003, 34(2):86-88. REN Luquan, WANG Zaizhou, HAN Zhiwu.Experimental research on sliding wear of bionic nonsmoothed surface[J].Journal of Agricultural Machinery, 2003, 34(2):86-88.(in Chinese)
[6]	田丽梅, 任露泉, 韩志武, 等.仿生非光滑表面脱附与减阻技术在工程上的应用[J].农业机械学报, 2005, 36(3):138-142. TIAN Limei, REN Luquan, HAN Zhiwu, et al.Applications of anti-adhesion and anti-resistance of biomimetic non-smooth surface in engineering[J].Journal of Agricultural Machinery, 2005, 36(3):138-142.(in Chinese)
[7]	徐俊伟, 吴亚锋, 陈耿.气动噪声数值计算方法的比较与应用[J].噪声与振动控制, 2012, 32(4):6-10. XU Junwei, WU Yafeng, CHEN Geng.Comparison and application on the aero-acoustics numerical computing methods[J].Noise and Vibration Control, 2012, 32(4):6-10.(in Chinese)
[8]	王福军.计算流体动力学分析:CFD软件原理与应用[M].北京:清华大学出版社, 2004.
[9]	GU Zhengqi, WANG Yiping, LI Weiping.Evaluation of aerodynamic noise generated in a miniature car using numerical simulation[R].SAE Technical Paper 2009-01-0478, 2009.
[10]	杨博, 付立敏.轿车外流场网格生成策略及数值模拟[J].农业机械学报, 2007, 38(4):8-11. YANG Bo, FU Limin.Mesh generation strategies of the external flow field around a sedan and the numerical simulation research[J].Transactions of the Chinese Society of Agricultural Machinery, 2007, 38(4):8-11.(in Chinese)
[11]	Souliez F J, Long L N, Morri P J, et al.Landing gear aerodynamic noise prediction using unstructured grids[J].International Journal of Aeroacoustics, 2002, 1(2):115-135.
[12]	Jonghyun P.Aeroacousitcs simulation of automotive front end module cooling fan[R].Frankfurt, Germany:2nd European Automotive CFD Conference, 2005.
[13]	杨博.汽车外部空气动力噪声研究[D].长春:吉林大学, 2008. YANG Bo.Research on automobile exterior aerodynamic noise[D].Changchun:Jilin University, 2008.(in Chinese)
[14]	Hoeld R, Brenneis A, Eberle A, et al.Numerical simulation of aeroacoustic sound generated by generic bodies placed on a plate:PartⅠ prediction of aeroacoustic sources[R].AIAA 99-1896, 1999.
[15]	汪怡平, 谷正气, 杨雪, 等.微型客车后视镜气动噪声仿真分析与控制[J].航空动力学报, 2009, 24(7):1577-1583. WANG Yiping, GU Zhengqi, YANG Xue, et al.Aerodynamic noise analysis and control for mini-van car side view mirror[J].Journal of Aerospace Power, 2009, 24(7):1577-1583.(in Chinese)