某SUV后视镜降噪设计与风洞试验验证

doi:10.19562/j.chinasae.qcgc.2023.04.017

Abstract

Abstract:

To investigate the effect of automobile rearview mirror arm on the aero-acoustics， based on a certain SUV automobile rearview mirror， the detached eddy simulation method is used to analyze the flow field and near field noise characteristics. By changing the shape of the arm， two kinds of noise-reduction models are designed， and the aerodynamic noise wind tunnel tests of three rearview mirror models are carried out in the FL-53 aero-acoustic wind tunnel of the Institute of Aerodynamics of the Aviation Industry. The results show that by changing the curvature around the mirror arm， the size of detached eddy is reduced， the direction of vortex shedding is changed， and the noise near the wake zone is reduced. Besides， the wind velocity can affect the noise reduction in some frequency bands. In terms of far-field directivity， the sound pressure level of the three rear-view mirrors in the wake flow field is larger， and the noise reduction models cannot change the far-field directivity.

Key words: rearview mirror, noise reduction effect, far-field directivity, wind tunnel test

Miaoyan Song,Guocheng Zhou,Hongqing Chen,Bao Chen. Noise Reduction Design and Wind Tunnel Test Verification of an SUV Rearview Mirror[J].Automotive Engineering, 2023, 45(4): 681-689.

Figures/Tables 17

References 16

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风速/（km·h^-1）	峰值频率/Hz
60	70
80	97
100	120
120	131
140	172

传声器编号	1	2	3	4	5	6	7
测量距离/m	1.66	1.15	0.72	0.35	0	0.35	0.72
相对于90°修正量/dB	1.91	1.02	0.43	0.11	0	0.11	0.43

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Noise Reduction Design and Wind Tunnel Test Verification of an SUV Rearview Mirror

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