• CN：11-2187/TH
• ISSN：0577-6686

• 运载工程 •

### 高速列车轮对气动噪声特性分析

1. 1. 同济大学铁道与城市轨道交通研究院 上海 201804;
2. 同济大学上海地面交通工具风洞中心 上海 201804
• 收稿日期:2018-07-10 修回日期:2018-12-19 出版日期:2019-07-20 发布日期:2019-07-20
• 通讯作者: 朱剑月(通信作者),男,1973年出生,博士,副教授。主要研究方向为高速列车空气动力学与气动噪声。E-mail:zhujianyue@tongji.edu.cn
• 基金资助:
上海市浦江人才计划（17PJ1409300）、国家自然科学基金（11772230）、牵引动力国家重点实验室开放课题资助（TPL1804）、中央高校基本科研业务费专项资金（22120170247）资助项目。

### Flow-induced Noise Behaviour around High-speed Train Wheelsets

ZHU Jianyue1,2, LEI Zhenyu1, LI Li1

1. 1. Institute of Railway and Urban Mass Transit, Tongji University, Shanghai 201804;
2. Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai 201804
• Received:2018-07-10 Revised:2018-12-19 Online:2019-07-20 Published:2019-07-20

Abstract: The parts of the high-speed train wheelset located outside the bogie cavity are exposed to the unsteady air flows. Due to this strong flow impact, the large aerodynamic noise is generated around the wheelset. The flow and flow-induced noise behaviour around the isolated wheelset and the tandem wheelsets are investigated at a scaled model. For the isolated wheelset case, results show that due to vortex shedding and flow separation, the coherently alternating shedding vortices are generated from the axle whereas the wheel wake is dominated by the irregular vortices with different scales. The volume dipole is the predominate source of the quadrpole noise generated in the wheelset wake. Moreover, it is found that good agreement is achieved between numerical simulation and experimental measurement. The dipole noise produced from the pressure fluctuations on the wheelset wall surfaces is the main aerodynamic noise source. Corresponding to the dominant frequencies of the oscillating lift and drag forces from the wheelset, the frequency of the first harmonic peak of the radiated tonal noise is twice the shedding frequency from the axle. The aerodynamic noise generated from the axle is much higher than that from the wheel, leading to a typical dipole pattern in the far-field noise directivity. The inclusion of wheelset rotation increases the radiated noise levels around 2 dB with similar directivity compared with the stationary wheelset. For the tandem-wheelset case, the flow-induced noise behaviour of the upstream wheelset is similar to the isolated wheelset case, whereas the rear wheelset is submerged in the upstream wheelset wake and situated in a turbulent condition, and thus the irregular flow feature makes the noise radiation more broadband and multi-directional with lower noise amplitude level.