Feature Identification of Aerodynamic Noise Source in Vehicle Rearview Mirror-A Pillar Area

被引：0

作者：

Wang Y. ^{[1
,2
]}

Zhao S. ^{[1
,2
]}

Zhang H. ^{[1
,2
]}

Yang Z. ^{[1
,2
]}

机构：

[1] Tongji University, Shanghai Automotive Wind Tunnel Center, Shanghai

[2] Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Shanghai

来源：

Qiche Gongcheng/Automotive Engineering | 2021年 / 43卷 / 12期

关键词：

A-pillar; aerodynamic noise; dipole sound source; rearview mirror; vehicles; vorticity;

D O I：

10.19562/j.chinasae.qcgc.2021.12.014

中图分类号：

学科分类号：

摘要：

This paper aims to identify the features of aerodynamic noise source in rearview mirror-A pillar area. Firstly, on the basis of the theory of vortex sound, and utilizing the acoustic feature that the vehicle aerodynamic noise source is mainly the dipole sound source, the aerodynamic sound source is equivalent to innumerable micro-spherical sound sources. Then, using the relationship between sound radiation and the physical quantities of flow field, combined with aerodynamic numerical simulation technology, an identification method of dipole sound sources is established, and the aerodynamic noise source in rearview mirror-A-pillar area is identified. Finally, based on the relationship between physical quantities and the sound source, the generation mechanism of the dipole sound source is revealed. The results show that the main dipole sound source in rear-view mirror-A-pillar area appears on the ridgelines and turning positions of the component's surface, the intense change of physical quantities with space is the main reason of the generation of aerodynamic sound source, the vorticity ω is the main contributor to the intensity of sound source, but the angle θ between vorticity and velocity also has certain effects on the intensity of sound source. © 2021, Society of Automotive Engineers of China. All right reserved.

引用

页码：1840 / 1847

页数：7

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