平面射流的汽车天窗风振降噪特性  

Buffeting noise reduction characteristics of vehicle sunroof with plane jet

作　　者：张志飞[1] 任辉 曹斯诗 贺岩松[1] 张全周 ZHANG Zhifei;REN Hui;CAO Sishi;HE Yansong;ZHANG Quanzhou(College of Mechanical and Vehicle Engineering,Chongqing University,Chongqing 400030,China;China Automotive Engineering Research Institute Co.,Ltd.,Chongqing 401122,China)

机构地区：[1]重庆大学机械与运载工程学院,重庆400030 [2]中国汽车工程研究院股份有限公司,重庆401122

出　　处：《振动与冲击》2023年第3期209-216,共8页Journal of Vibration and Shock

基　　金：广西创新驱动发展专项资金。

摘　　要：为探究平面射流对汽车天窗风振噪声的降噪机理,使用大涡模拟对带有平面射流的现代简易车厢模型进行数值仿真,分析了射流参数改变时平面射流的降噪效果变化。结果表明:添加平面射流后脱落漩涡的运动轨迹发生变化,车厢内的压力波动降低,风振噪声得到抑制;更大的射流速比和射流开口宽度能带来更好的降噪效果;不同射流角度下的降噪效果不同,降噪效果最好的射流角度区间约为110°~130°;探究了射流参数、射流轨迹与降噪效果之间的关系,为平面射流降噪装置的开发设计提供参考。Here, to explore noise reduction mechanism of plane jet on buffeting noise of vehicle sunroof, large eddy simulation was used to simulate the Hyundai simple car model with plane jet, and analyze variations of noise reduction effect of plane jet when jet parameters were changed. The results showed that after plane jet is added, motion trajectory of shedding vortex changes, pressure fluctuation in compartment is reduced, and buffeting noise is suppressed;larger jet velocity ratio and jet opening width can bring better noise reduction effect;noise reduction effects are different under different jet angles, and the range of jet angle with the best noise reduction effect is about 110°-130°;relations among jet parameters, jet trajectory and noise reduction effect are explored, the study results can provide a reference for developing and designing plane jet noise reduction devices.

关 键 词：风振噪声 平面射流 射流参数 汽车天窗 

分 类 号：U467.493[机械工程—车辆工程]