Journal of Jilin University(Engineering and Technology Edition) ›› 2020, Vol. 50 ›› Issue (2): 426-436.doi: 10.13229/j.cnki.jdxbgxb20180867

Previous Articles    

Effect of rearview mirror modeling on aerodynamic noise of front window

Xin CHEN(),Ning WANG,Chuan-liang SHEN(),Xiao FENG,Chang-hai YANG   

  1. State Key Laboratory of Automobile Simulation and Control，Jilin University，Changchun 130022，China
  • Received:2018-08-20 Online:2020-03-01 Published:2020-03-08
  • Contact: Chuan-liang SHEN E-mail:cx@jlu.edu.cn;shencl@jlu.edu.cn

RICH HTML

 9   

PDF (PC)

318

Abstract:

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.

Key words: vehicle engineering, aerodynamic noise, rear-view mirror, numerical simulation, modeling factors

CLC Number: 

  • U463.85

Fig.1

Rear view mirror and 3D geometric model"

Fig.2

Rearview mirror-flat 3D model"

Fig.3

Computational domain model"

Table 1

Boundary layer structure parameter（DES）"

项目后视镜A后视镜B后视镜C后视镜D后视镜E
首层厚度/mm0.30.30.30.30.3
增长率1.011.011.011.011.01
总层数1010101115
总厚度/mm3.13.13.13.54.8

Table 2

Boundary layer structure parameter（LES）"

项目后视镜A后视镜B后视镜C后视镜D后视镜E
首层厚度/mm0.070.070.070.070.08
增长率1.181.181.181.181.18
总层数1314131415
总厚度/mm33.633.64.9

Table 3

Set boundary conditions"

位置条件说明
计算域入口速度入口V33.33 m/s
计算域出口压力出口标准大气压
后视镜、桌子、计算域底面壁面非滑移壁面
计算域顶面、侧面对称面标准对称面

Fig.4

Residual convergence curve"

Fig.5

Monitoring point distribution of mirror E"

Fig.6

Important monitoring point position's sound pressure level of rearview mirror E"

Fig.7

Position and wake structure diagram of plane X1"

Fig.8

Position and wake structure diagram of plane Y1"

Fig.9

Position and wake structure diagram of plane Y2"

Fig.10

Position and wake structure diagram of plane Z1"

Fig.11

Position and wake structure diagram of plane Z2"

Fig.12

Five kinds of rearview mirror surface pressure cloud"

Fig.13

Five kinds of rearview mirror surface sound power"

1 Li Q, Yang Z, Wang Y, et al. Experimental and numerical studies on aerodynamic noise of automotive rear view mirror[J]. Noise Control Engineering Journal, 2011, 59(6): 613-621.
2 Chen K H, Johnson J, Dietschi U, et al. Wind noise measurements for automotive mirrors[J]. SAE International Journal of Passenger Cars-Mechanical Systems, 2009, 2(1): 419-433.
3 杨博, 傅立敏. 稳态数值模拟在轿车外气动噪声源预测中的应用[J]. 吉林大学学报: 工学版, 2007, 37(5): 1005-1008.
Yang Bo, Fu Li-min. Application of steady state numerical simulation to prediction of sedan exterior aeroacoustic sources[J]. Journal of Jilin University (Engineering and Technology Edition), 2007, 37(5): 1005-1008.
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 Qi-liang, Yang Zhi-gang, Wang Yi-gang. Influence parameters of aerodynamic noise for automotive rear view mirror[J]. Journal of Tongji University (Natural Science Edition), 2011, 39(8): 1204-1207.
5 Khalighi B, Snegirev A, Shinder J, et al. Simulations of flow and noise generated by automobile outside rear-view mirrors[J]. International Journal of Aeroacoustics, 2012, 11(1): 137-156.
6 任露泉, 孙少明, 徐成宇. 鸮翼前缘非光滑形态消声降噪机理[J]. 吉林大学学报: 工学版, 2008, 38(增刊1): 126-131.
Ren Lu-quan, Sun Shao-ming, Xu Cheng-yu. Noise reduction mechanism of non-smooth leading edge of owl wing[J]. Journal of Jilin University (Engineering and Technology Edition), 2008, 38(Sup.1): 126-131.
7 陈鑫, 冯晓, 沈传亮, 等. 车外后视镜造型对气动噪声影响的实验研究[J]. 汽车工程, 2017, 39(2): 206-213.
Chen Xin, Feng Xiao, Shen Chuan-liang, et al. Experimental study on the influence of rear view mirror modeling on aerodynamic noise[J]. Automotive Engineering, 2017, 39(2): 206-213.
8 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 Yi-ping, Gu Zheng-qi, Yang Xue, et al. Simulation analysis and control of aerodynamic noise in rear-view mirror of minibus[J]. Journal of Aerospace Power, 2009, 24(7): 1577-1583.
9 杨万里, 李明江, 刘国庆. 乘用车风噪声模拟研究[J]. 华中科技大学学报: 自然科学版, 2005, 33(11): 77-79.
Yang Wan-li, Li Ming-jiang, Liu Guo-qing. Wind noise simulation of passenger car[J]. Journal of Huazhong University of Science and Technology (Natural Science Edition), 2005, 33(11): 77-79.
10 Kim J H, Han Y O. Experimental investigation of wake structure around an external rear view mirror of a passenger car[J]. Journal of Wind Engineering & Industrial Aerodynamics, 2011, 99(12): 1197-1206.
11 Khalighi B, Chen K H, Johnson J P, et al. Computational and experimental investigation of the unsteady flow structures around automotive outside rear-view mirrors[J]. International Journal of Automotive Technology, 2013, 14(1): 143-150.
[1] Chen-guang LAI,Qing-yu WANG,Bo HU,Kai-ping WEN,Yan-yu CHEN. Design and optimization of a car empennage with winglet under effect of static aeroelasticity [J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(2): 399-407.
[2] Hui YE,Chang LIU,Kang-kang YAN. Application of fiber reinforced composite in auto⁃body panel [J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(2): 417-425.
[3] Xiao-yu LI,Nan XU,Tao QIU,Kong-hui GUO. Influence of anisotropic stiffness on tire mechanical properties and vehicle handling characteristics under combined slip situations [J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(2): 389-398.
[4] Fang-wu MA,Hong-yu LIANG,Ying ZHAO,Meng YANG,Yong-feng PU. Multi⁃objective crashworthiness optimization design of concave triangles cell structure with negative Poisson′s ratio [J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(1): 29-35.
[5] Kong-hui GUO,Shi-qing HUANG,Hai-dong WU. In⁃plane dynamic tire model for high⁃frequency excitation [J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(1): 19-28.
[6] Zhe WANG,Yi XIE,Peng-fei ZANG,Yao WANG. Energy management strategy of fuel cell bus based on Pontryagin′s minimum principle [J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(1): 36-43.
[7] Wen-ku SHI,Long CHEN,Gui-hui ZHANG,Zhi-yong CHEN. Modeling and tests for torsional characteristics of multi-stage stiffness dual mass flywheel torsional dampers [J]. Journal of Jilin University(Engineering and Technology Edition), 2020, 50(1): 44-52.
[8] Xin GUAN,Hao JIN,Chun-guang DUAN,Ping-ping LU. Estimation of lateral slope of vehicle driving road [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1802-1809.
[9] Xin CHEN,Xin-jian RUAN,Ming LI,Ning WANG,Jia-ning WANG,Kai-xuan PAN. Application of modified discrete scheme based onlarge eddy simulation [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1756-1763.
[10] Ya-feng GONG,Bo WANG,Guo-jin TAN,Li-min ZHANG,Wen-ding WU,Hai-peng BI. Comparative analysis of mechanical characteristics of two typical fabricated culverts in Jilin [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1865-1870.
[11] Fang-wu MA,Li-wei NI,Liang WU,Jia-hong NIE,Guang-jian XU. Position and attitude closed loop control of wheel⁃leggedall terrain mobile robot [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1745-1755.
[12] Li-qiang JIN, Duan-yang TIAN, Hao TIAN, Meng-meng LIU. Brake force assistant technology for vehicle electronicstability control system [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1764-1776.
[13] Yang WANG,Zhan⁃shuai SONG,Kong⁃hui GUO,Ye ZHUANG. Measurement of inertial parameters of rotating inertia rig [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1795-1801.
[14] Wei-min ZHUANG,Yang LIU,Peng-yue WANG,Hong-da SHI,Ji-shuan XU. Simulation on peeling failure of self⁃piercing riveted joints insteel and aluminum alloy dissimilar sheets [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1826-1835.
[15] Wei-ping SHI,Xu ZHAO,Xing-jun HU,Tian-ming YU,Bo-wen LIU,Yan DUAN. Design and numerical simulation of water restriction device AICD for natural gas exploitation [J]. Journal of Jilin University(Engineering and Technology Edition), 2019, 49(6): 1986-1991.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
Copyright © Journal of Jilin University(Engineering and Technology Edition), All Rights Reserved.
Tel: +86-431-85095297　Fax: +86-431-85094074　E-mail: xbgxb@jlu.edu.cn
Powered by Beijing Magtech Co. Ltd