Chinese Journal of Mechanical Engineering >

2022 , Vol. 35 >Issue 2: 28 - 28

DOI: https://doi.org/10.1186/s10033-022-00705-4

Advanced Transportation Equipment

Step-by-Step Numerical Prediction of Aerodynamic Noise Generated by High Speed Trains

  • Tian Li ,
  • Deng Qin ,
  • Ning Zhou ,
  • Weihua Zhang
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  • State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, 610031, China

Received date: 2020-09-14

  Revised date: 2022-01-13

  Online published: 2022-06-30

Supported by

Supported by National Key Research and Development Program of China (Grant No. 2020YFA0710902) and National Natural Science Foundation of China (Grant No. 12172308)

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Abstract

In this paper, the unsteady flow around a high-speed train is numerically simulated by detached eddy simulation method (DES), and the far-field noise is predicted using the Ffowcs Williams-Hawkings (FW-H) acoustic model. The reliability of the numerical calculation is verified by wind tunnel experiments. The superposition relationship between the far-field radiated noise of the local aerodynamic noise sources of the high-speed train and the whole noise source is analyzed. Since the aerodynamic noise of high-speed trains is derived from its different components, a stepwise calculation method is proposed to predict the aerodynamic noise of high-speed trains. The results show that the local noise sources of high-speed trains and the whole noise source conform to the principle of sound source energy superposition. Using the head, middle and tail cars of the high-speed train as noise sources, different numerical models are established to obtain the far-field radiated noise of each aerodynamic noise source. The far-field total noise of high-speed trains is predicted using sound source superposition. A step-by-step calculation of each local aerodynamic noise source is used to obtain the superimposed value of the far-field noise. This is consistent with the far-field noise of the whole train model's aerodynamic noise. The averaged sound pressure level of the far-field longitudinal noise measurement points differs by 1.92 dBA. The step-by-step numerical prediction method of aerodynamic noise of high-speed trains can provide a reference for the numerical prediction of aerodynamic noise generated by long marshalling high-speed trains.

Key words： High-speed train; Aerodynamic noise; Sound source superposition; Numerical prediction

Cite this article

Tian Li , Deng Qin , Ning Zhou , Weihua Zhang . Step-by-Step Numerical Prediction of Aerodynamic Noise Generated by High Speed Trains[J]. Chinese Journal of Mechanical Engineering, 2022 , 35(2) : 28 -28 . DOI: 10.1186/s10033-022-00705-4

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