轿车外流场及气动噪声的建模与仿真  

External Aero Flow and Wind Noise Calculation on a Passenger Car with CFD

作　　者：熊可嘉[1] 杨坤[1] 王毅刚[2] 李启良[2] 

机构地区：[1]上海汽车集团股份有限公司技术中心,上海201804 [2]同济大学上海地面交通工具风洞中心,上海201804

出　　处：《汽车科技》2011年第5期42-45,共4页Auto Sci-Tech

摘　　要：汽车高速运行时会产生空气动力学噪声,这对汽车乘坐的舒适性、车内乘客的相互交流都会有十分不利的影响。通过CFD手段,采用大涡模拟方法和Lighthill理论,对汽车外流场进行了计算和声学分析。结果表明,CFD不仅可以提供该车气动噪声特性,而且指出前挡风玻璃与车顶连接处、后视镜的造型、车门把手存在优化可能,这为进一步降低该车的风噪提供方向性指导。As an automobile travels down the road ,airflow interacts with the surface of the vehicle body to generate aerodynamic noise. Wind noise can be quite loud, which can annoy passengers and make it difficult to converse with other passengers. With LES and Lighthill theory,this paper calculates the wind noise of a vehicle. The results reveal that the noise Level can be further reduced by optimizing the junction of wind shield and roof. The rear view mirror style and the handle of the door.

关 键 词：轿车 风噪 大涡模拟 声学分析 

分 类 号：U464.134.4[机械工程—车辆工程]