B柱扰流器对风振噪声的影响及其机理  

Influence of B-pillar Spoiler on Wind Buffeting Noise and its Mechanism

作　　者：陈小勇 姚璐 郭正鑫 刘浩 罗挺 王永亮 Chen Xiaoyong;Yao Lu;Guo Zhengxin;Liu Hao;Luo Ting;Wang Yongliang(Dongfeng Motor Corporation Technical Center,Wuhan 430056)

机构地区：[1]东风汽车集团有限公司技术中心,武汉430056

出　　处：《汽车工程》2023年第9期1772-1778,1771,共8页Automotive Engineering

基　　金：东风汽车集团有限公司技术中心科研课题项目(91224Y190059)资助。

摘　　要：汽车风振噪声是衡量其舒适性的重要指标之一。本文首先用道路试验验证了风振流场仿真方法的有效性。接着解释了风振噪声是由周期性脱落的湍流涡与车内空腔共振导致的,并提出了风振噪声的降噪策略。随后探究B柱扰流器对风振噪声的影响及其机理,发现减小自由剪切层偏离B柱外表面的最大距离可以减小湍流涡的强度,进而减小风振噪声。所设计的扰流器最大降噪效果可达12.8 dB。最后用试验验证了B柱扰流器方案的有效性。该研究结论对于进一步理解和控制风振噪声具有一定理论意义和工程应用价值。The wind buffeting noise of automobile is one of the important indexes for comfort evaluation.Firstly,the validity of wind buffeting CFD simulation method is verified by road test in this paper.Then,it is explained that the wind buffeting noise is caused by resonance of periodic shedding of turbulent vortex and the interior cavity of the vehicle,and the noise reduction strategy of wind buffeting is proposed.Then the influence of the B-pillar spoiler on the wind buffeting noise and its mechanism are investigated.It is found that reducing the maximum distance of the free shear layer from the outer surface of the B-pillar can reduce the strength of the vortex,thereby reducing the wind buffeting noise.The maximum noise reduction of the spoilers designed in this paper can reach 12.8 dB.Finally,the effectiveness of the B-pillar spoiler is verified by road test.The conclusion of this paper has certain theoretical significance and engineering application value for further understanding and controlling wind buffeting noise.

关 键 词：风振 降噪 B柱 扰流器 流场仿真 湍流涡 

分 类 号：U467.493[机械工程—车辆工程]