Numerical Simulation of Aerodynamic Noise Characteristics of High-Speed Maglev Train with a Speed of 600 km · h-1

被引：0
|
作者：
Zhang J. [1 ,2 ,3 ]
Wu Y. [1 ,2 ,3 ]
Gao J. [1 ,2 ,3 ]
Gao G. [1 ,2 ,3 ]
Yang Z. [1 ,2 ,3 ]
机构：
[1] Key Laboratory of Traffic Safety on Track, Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha
[2] Joint International Research Laboratory of Key Technologies for Rail Traffic Safety, Central South University, Changsha
[3] National and Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Changsha
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2021年 / 42卷 / 06期
关键词：
Aerodynamic noise; High-speed maglev train; Large eddy simulation; Penetrable integral surface; Speed level;
D O I：
10.3969/j.issn.1001-4632.2021.06.12
中图分类号：
学科分类号：
摘要：
When the speed of maglev trains exceeds 400 km · h-1, the influence of quadrupole sound source on the far-field noise of train cannot be ignored. Based on large eddy simulation (LES) method and Kirchhoff-Ffowcs Williams and Hawkings (K-FWH) equations, the characteristics of dipole and quadrupole sound sources of maglev trains at different speed levels were simulated and analyzed by constructing reasonable penetrable integral surface. The results show that the aerodynamic sound source of maglev trains is the spatial disturbance caused by the separation of boundary layers on the streamline area of tail car. The dipole sound source of maglev trains is mainly distributed around the radio terminal of the head/tail cars, the rail holding bottom of the streamlined head/tail cars and the nose tip area of the tail car, while the quadrupole sound source is mainly distributed in the wake area. With the train running at the speed levels of 400, 500 and 600 km · h-1, the radiation energy of the quadrupole sound source is 62.4%, 63.3% and 71.7% respectively, which are higher than those of dipole sound source and occupy the dominant position. © 2021, Editorial Department of China Railway Science. All right reserved.
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页码：112 / 121
页数：9
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