Reduction of Aerodynamic Noise of High-speed Train Pantograph

doi:10.3901/JME.2017.06.094

Abstract

Abstract:

Based on Lighthill acoustic theory in this paper, broadband noise source model, large eddy simulation and Ffowcs Williams-Hawkings equation are used to perform numerical simulations in aerodynamic noise of a high-speed train. The aerodynamic noise model of full scale high-speed train is established. The main aerodynamic noise source and the characteristics of far-field aerodynamic noise of a high-speed train are analyzed, as well the analysis methods of noise reduction based on the main noise source is presented. The low-noise design and improvement of high-speed train primarily based on the main noise source such as the knuckle-downstream direction/the knuckle-upstream direction, the different pantograph fairings and the different installations of pantograph fairings. Based on the above analysis, the low-noise structure of full scale high-speed train pantograph which max sound pressure level is 3.1 dBA lower than the original trains is obtained. Thus the designed goal of noise reduction has been achieved. In addition, the accuracy and effectiveness of calculating method of aerodynamic noise has been proved by wind tunnel test.

Key words: aerodynamic noise, large eddy simulation, low-noise design, pantograph, pantograph fairing, high-speed train

ZHANG Yadong, HAN Lu, LI Ming, ZHANG Jiye. Reduction of Aerodynamic Noise of High-speed Train Pantograph[J]. Journal of Mechanical Engineering, 2017, 53(6): 94-101.

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