Numerical Analysis of Aerodynamic Noise of a New High-Speed Train

Wei Chen; Song Ping Wu

doi:10.4028/www.scientific.net/AMM.275-277.681

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 275-277Numerical Analysis of Aerodynamic Noise of a New...

Numerical Analysis of Aerodynamic Noise of a New High-Speed Train

Abstract:

Along with the raising of the train speed, aerodynamic noise of the high-speed train is generated more and more significantly and their reduction has become one of the key factors to control noise of the high-speed train. Aerodynamic noise radiated from the high-speed train surface was analyzed numerically. The mathematical and physical models of the three dimensional flow field of the high-speed train were established and the external steady and unsteady flow fields of the high-speed train were calculated by using the standard "k-ε" turbulence model and large eddy simulation (LES) respectively. On the basis of the steady flow field, aerodynamic noise sources on the car body surface of the high-speed train are calculated by using the broadband noise source model. On the basis of the unsteady flow field, the time domain characteristics of fluctuating pressures on the car body surface are analyzed. The sound pressure level on the surface pressure demonstrating is calculated and the flow field of some critical parts is analyzed.

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Periodical:

Applied Mechanics and Materials (Volumes 275-277)

Pages:

681-686

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.275-277.681

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Online since:

January 2013

Authors:

Wei Chen, Song Ping Wu

Keywords:

Aerodynamic Noise, Broadband Noise Source Model, High Speed Train (HST), Large Eddy Simulation (LES), Sound Pressure Level

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