汽车天窗开槽扰流器的降噪机理试验研究  

Experimental Research on Noise Reduction Mechanism of a Groove Spoiler in Vehicle Sunroof

作　　者：杨振东[1,2] 谷正气[1,3] 谢超[1] 宗轶琦[1] 汪怡平[4] 江财茂 YANG Zhendong;GU Zhengqi;XIE Chao;ZHONG Yiqi;WANG Yiping;JIANG Caimao(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha 410082, China;College of Mechanical Engineering, Hunan International Economics University, Changsha 410205, China;Hunan Province Cooperative Innovation Center for the Construction & Development of Dongting Lake Ecological Economic Zone,Hunan University of Arts and Science, Changde 415000, China;School of Automotive Engineering, Wuhan University of Technology, Wuhan 430070, China)

机构地区：[1]湖南大学汽车车身先进设计与制造国家重点实验室,湖南长沙410082 [2]湖南涉外经济学院机械工程学院,湖南长沙410205 [3]湖南文理学院洞庭湖生态经济区建设与发展协同创新中心,湖南常德415000 [4]武汉理工大学汽车工程学院,湖北武汉430070

出　　处：《湖南大学学报（自然科学版）》2018年第2期26-34,共9页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51375155;51775395);湖南省教育厅优秀青年科学研究项目(16B148);留学基金项目(留金发2012[2013]);湖南大学汽车车身先进设计与制造国家重点实验室自主课题资助项目(734215002)~~

摘　　要：开槽扰流器能有效地降低汽车天窗开启的风振噪声.为了更好地理解其降噪机理,构建了开槽扰流器和平直扰流器风洞试验平台,通过风洞试验来调查扰流器有无开槽对其后方壁面压力场的影响.试验结果表明,相比于平直扰流器,扰流器的开槽能够将流动再附着点提前,减少了气流的再循环区域,开槽扰流器下游流动存在初始的展向相位差,降低了壁面压力展向上的相干性,导致壁面压力在展向上具有较大的衰退性.因此开槽扰流器,对下游流动的扰动效果非常明显,能够弱化对乘员舱的激励.A groove spoiler can effectively reduce vehicle sunroof buffeting noise.In order to have a better understanding of sunroof buffeting noise reduction mechanism associated with groove spoilers,a test platform of groove and uniform spoiler was built.Wind tunnel experiments were performed to investigate the surface pressure field downstream of uniform and grooved spoilers and to observe the effects of the grooves on the wall pressure.The test results show that the presence of grooves in the spoiler moves the reattachment point upstream and reduces the recirculation region length.Compared with the uniform spoiler,an initial spanwise phase difference was observed behind the spoiler in the presence of the groove,which decreased the coherence of the wall pressure,and the wall pressure had a big decay rate in the spanwise direction.Grooves in the spoiler can obviously disturb the downstream flow,and thus it can weaken the primary aerodynamic excitation for the vehicle cabin.

关 键 词：风振噪声 开槽扰流器 降噪机理 风洞试验 

分 类 号：U461.4[机械工程—车辆工程]