Investigation on aerodynamic noise reduction for snow-plough of high-speed train  

高速列车排障器气动降噪研究

作　　者：TAN Xiao-ming YANG Zhi-gang 谭晓明;杨志刚(College of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China;Key Laboratory of Aerodynamic Noise Control,China Aerodynamics Research and Development Center,Mianyang 621000,China;School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China;Key Laboratory of Traffic Safety on Track,Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China)

机构地区：[1]College of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China [2]Key Laboratory of Aerodynamic Noise Control,China Aerodynamics Research and Development Center,Mianyang 621000,China [3]School of Automotive and Transportation Engineering,Hefei University of Technology,Hefei 230009,China [4]Key Laboratory of Traffic Safety on Track,Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China

出　　处：《Journal of Central South University》2022年第5期1735-1748,共14页中南大学学报（英文版）

基　　金：Project(ANCL20200302)supported by the Key Laboratory of Aerodynamic Noise Control;Project(JZ2020HGQA0213)supported by the Fundamental Research Funds for the Central Universities,China;Project(202010359084)supported by National Training Program of Innovation and Entrepreneurship for Undergraduates,China;Project(P2019-J008)supported by the Research on Key Technology of New Generation Fuxing EMU Platform,China;Project(2017YFB1201103-02)supported by National key R&D Plan,China。

摘　　要：A set of acoustic optimization design methods is established by combining the flow field deterioration theory and the acoustic analogy theory,and applied to the acoustic optimization design of high-speed train snow-plough.The results show that the streamline bodies of the head/tail car are the most important sound sources,respectively,accounting for 23.7%and 33.7%of the total sound energy.Compared with the streamline body of tail head,the streamline body of head car is more biased towards high frequency for the sound source energy.The A-weighted radiated noise of the train body is characterized by broadband sound(mainly in the range of 1-4 kHz)and peak features(especially at 2 kHz).The snow-plough with the maximum expansion length can mitigate the strong peak effect of the sound at 2 kHz,reduce the total sound energy,and show the best acoustic radiation performance in the four schemes.The numerical computation model was checked by the wind tunnel test results.基于流场恶化理论和声学类比理论建立了一套声学优化设计方法,并应用于高速列车排障器的声学优化设计中。结果表明,头尾车流线体是最重要的声源,分别占总声能的23.7%和33.7%。与尾车流线型部位相比,头车流线型部位声源能量更偏向高频。车体A计权辐射噪声呈现宽频带噪声(主要在1~4 kHz范围内)和峰值特征(尤其在2 kHz)。在四种方案中,最大伸缩长度的排障器能缓和2 k Hz的强峰值效应,降低总声能,并表现出最佳的声辐射性能。通过风洞试验验证了数值计算模型的正确性。

关 键 词：high-speed train snow-plough aero-acoustic optimized design expansion length 

分 类 号：U270.16[机械工程—车辆工程] TB535[交通运输工程—载运工具运用工程]