摘要
为降低全景影像镜头对汽车气动噪声的影响,对3种不同镜头布置位置的后视镜进行整车外流场和声场分析。计算得出的压力系数与试验数据相吻合,验证了计算模型的可靠性。同时,通过分析发现,全景镜头的不同位置对流经外后视镜气流有影响,从而改变了外后视镜尾部流场以及前侧窗噪声辐射强度。相比其它方案,方案Ⅲ后视镜尾部漩涡程度、湍流动能强度以及前侧窗表面噪声辐射都相对较弱,有利降低外后视镜镜头引起的气动噪声。最后,通过对3种方案进行实车风洞噪声试验,对比发现,方案Ⅲ的车内噪声相对于其他方案较低,从而验证了分析结果的正确性。为后视镜全景影像镜头的合理布置提供了指导,有利于改善汽车乘坐的舒适性。
In order to reduce the influence of the panorama camera on the aerodynamic noise of the vehicle,the exterior flow field and sound field analysis are carried out on the rearview mirror of three different lens placement positions.The calculated results are in good agreement with the experimental data,which verifies the reliability of the numerical simulation.At the same time,it is found that the different position of the panoramic lens has an influence on the air flow which through the exterior mirrors,thus changing the rear flow field and the front window noise radiation intensity.Scheme Ⅲ is compared with other schemes,the tail vortex,the turbulence kinetic energy and the noise emission of the front window are relatively weaker,which can reduce the aerodynamic noise.Finally,by comparing the noise test of three kinds of schemes,it is found that the noise of scheme Ⅲ is lower than that of other schemes,which verifies the correctness of the analysis method.The analysis results provides the guidance for the reasonable arrangement of the rearview mirror panorama image lens,and is favorable for improving the comfort of the driver.
作者
童高鹏
甘伟
李志伟
林辉
王之丰
TONG GaoPeng;GAN Wei;LI ZhiWei;LIN Hui;WANG ZhiFeng(Zhejiang Industry Polytechnic College,Shaoxing 312000,China;Geely Automobile Research Institute,Ningbo 315336,China)
出处
《机械强度》
CAS
CSCD
北大核心
2018年第4期1007-1011,共5页
Journal of Mechanical Strength
基金
国家自然科学基金项目(51105283)资助~~
关键词
外后视镜
全景影像镜头
流场
气动噪声
试验
Exterior Mirrors
Panoramic Camera lens
Flow Field
Aerodynamic Noise
Test
