汽车后视镜气动噪声优化研究*

doi:10.19562/j.chinasae.qcgc.2020.01.018

汽车工程 ›› 2020, Vol. 42 ›› Issue (1): 121-126.doi: 10.19562/j.chinasae.qcgc.2020.01.018

汽车后视镜气动噪声优化研究^*

姜豪, 赖万虎, 张思文, 董国旭, 贾文宇, 庞剑

1.汽车噪声振动和安全技术国家重点实验室,重庆 401120;
2.长安汽车工程研究总院,重庆 401120

收稿日期:2018-11-14 发布日期:2020-01-21
通讯作者: 庞剑,教授,E-mail:pangjian@changan.com.cn
基金资助:
*碳纤维车身纯电动轿车整车集成匹配技术课题(2016YFB0101706)资助

Research on Aeroacoustic Optimization of Vehicle Rearview Mirror

Jiang Hao, Lai Wanhu, Zhang Siwen, Dong Guoxu, Jia Wenyu, Pang Jian

1.State Key Laboratory of Vehicle NVH and Safety Technology, Chongqing 401120;
2.Changan Auto Globe R&D Center, Chongqing 401120

Received:2018-11-14 Published:2020-01-21

摘要/Abstract

摘要： 针对某车型外后视镜气动噪声问题,提出了一种基于车外流场计算的气动噪声快速优化方法,并进行了相应的试验验证。在非定常数值模拟中,采用分离涡模拟与计算气动声学相结合的方法,对后视镜侧窗表面气动噪声进行了分析。结果表明,优化后侧窗表面气动噪声源强度在各频段明显减弱,各监测点声压级降低。道路试验验证结果表明,优化后各频段车内噪声也明显改善,后视镜气动噪声问题消失。实车道路测试结果表明,基于外流场数值模拟的气动噪声优化方法可行、合理,外流场数值模拟可为造型初期车内气动噪声优化提供有效指导,降低车型开发成本与周期。

关键词: 气动噪声优化, 外后视镜, 数值模拟

Abstract: Aiming at the aeroacoustic problem of the exterior rearview mirror of a car, a fast optimization scheme for aerodynamic noise is proposed based on the calculation of exterior flow field around vehicle, with the results of optimization verified by corresponding tests. In unsteady numerical simulation, the aerodynamic noises on the surface of front side window are analyzed by detached eddy simulation combined with computational aeroacoustics. The results indicate that after optimization, the intensity of aerodynamic noise source on the surface of front side window is obviously weakened in most frequency bands, and the sound pressure level at different monitoring points is lowered, meanwhile the results of real vehicle road test show that the scheme of aeroacoustic optimization based on exterior flow field simulation is feasible and reasonable. Both these demonstrate that exterior flow field simulation can provide effective guidance for in-vehicle aeroacoustic optimization in early styling stage, reducing cost and leadtime of vehicle development

Key words: aeroacoustic optimization, exterior rearview mirror, numerical simulation

姜豪, 赖万虎, 张思文, 董国旭, 贾文宇, 庞剑. 汽车后视镜气动噪声优化研究^*[J]. 汽车工程, 2020, 42(1): 121-126.

Jiang Hao, Lai Wanhu, Zhang Siwen, Dong Guoxu, Jia Wenyu, Pang Jian. Research on Aeroacoustic Optimization of Vehicle Rearview Mirror[J]. Automotive Engineering, 2020, 42(1): 121-126.

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汽车后视镜气动噪声优化研究^*

Research on Aeroacoustic Optimization of Vehicle Rearview Mirror

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