- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
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- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
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| Citation: | WANG Yigang, ZHU Langxian, WANG Yupeng, ZHANG Hao, JIAO Yan. Characteristic Identification of Aerodynamic Noise Sources in High-Speed Train Bogie Area[J]. Journal of Southwest Jiaotong University, 2023, 58(2): 261-271, 286. doi: 10.3969/j.issn.0258-2724.20210636
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In order to create an identification method of aerodynamic noise source of high-speed trains, based on the wave equation of aeroacoustics, the high-speed train aerodynamic sound source was equivalent to countless micro-spherical sound sources. Using the relationship between sound radiation and physical quantities of the flow field, combined with the high-speed train aerodynamic numerical simulation technology, identification methods of dipole sound source and quadrupole sound source of high-speed train were established. The aerodynamic noise sources of a high-speed train head coach were identified from a new perspective by the methods. Based on the characteristics of the sound source term of the vortex sound equation, the relationship between the dipole sound source and the flow field was revealed. The research results clarify the strength and distribution characteristics of the main dipole and quadrupole sound sources of high-speed train, and indicate that the direct impact and separation of the airflow are the main reasons for the sound sources. The aerodynamic noise sources in the head coach and bogie area are mainly dipole sound sources. The strong dipole sound sources appear at the sharp edges of the parts. In most cases, the vorticity increases sharply when the fluid passes by those sharp edges, which becomes the main reason for the formation of a strong sound source.
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