高速列车受电弓的低马赫数过渡式空腔射流降噪研究

doi:10.16180/j.cnki.issn1007-7820.2023.04.004

Abstract

Abstract:

The pantograph and its cavity are the main sources of aerodynamic noise in high-speed trains, and it is particularly important to reduce this noise. There is less attention paid to the pantograph cavity compared to the pantograph in previous studies on aerodynamic noise of high-speed trains. In view of the problem of aerodynamic noise reduction of high-speed train pantograph and its cavity, numerical calculation methods are utilized to investigate the flow field characteristics and the law of noise propagation of the simplified high-speed train model under the condition of 350 km·h^-1. The results show that the application of jet on the front edge of the pure cavity can significantly reduce the unsteady flow in the cavity and near the pantograph. When the jet velocity is 27 m·s^-1, the maximum reduction in sound source pressure level of radiated noise on the back wall to the top and side of the cavity is 5 dB, and the noise at the monitoring point on the side of the pantograph is significantly reduced. The proposed study provides a direction for the research of transitional cavity jet noise reduction under low Mach number.

Key words: numerical simulation, turbulence model, high-speed train, aeroacoustics, pantograph cavity, low Mach number, transitional cavity, jet noise reduction

CLC Number:

TP391.9

TANG Zenan,MIAO Xiaodan,YANG Jian,YUAN Tianchen. Research on Low Mach Number Transitional Cavity Jet Noise Reduction of High-Speed Train Pantograph[J].Electronic Science and Technology, 2023, 36(4): 29-35.

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Research on Low Mach Number Transitional Cavity Jet Noise Reduction of High-Speed Train Pantograph

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