稳态数值模拟在轿车外气动噪声源预测中的应用  

Application of steady state numerical simulation to prediction of sedan exterior aeroacoustic sources

作　　者：杨博[1] 傅立敏[1] 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室,长春130022

出　　处：《吉林大学学报（工学版）》2007年第5期1005-1008,共4页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金GM专项资助项目(60222207);吉林大学'985工程'资助项目

摘　　要：以某轿车模型和不同形状参数的外后视镜模型为研究对象,通过稳态雷诺平均那维尔斯托克斯方法求解轿车外流场。根据流场计算结果,应用Lilley公式获得轿车车外气动噪声源分布。数值模拟结果与文献[4]中风洞试验数据吻合较好。此外,还总结了外后视镜形状参数对气动噪声的影响,通过外后视镜区域压力分布解释了其形状参数影响气动噪声的原因,为轿车设计初期阶段降低气动噪声提供参考。The flow fields around a certain sedan with different external rear view mirrors were computed by the steady-state Reynolds averaged Navier-Stokes method. Based on the computed results of the flow field, the distribution of the sedan exterior aerodynamic noise sources was obtained using Lilley formula. The numerical simulation results were in good agreement with the wind tunnel experiment data in literatures. The effect of the geometric parameters of the exterior rear view mirror on the aerodynamic noise of the sedan was summarized, and its cause was explained by the pressure distribution in the region of the mirror,providing a recommendation to reduce the aerodynamic noise at the early stage of the sedan design process.

关 键 词：车辆工程 轿车 车外气动噪声 稳态数值模拟 

分 类 号：U461.1[机械工程—车辆工程]