Second International Conference on Rail Transportation
Numerical Investigation of Flow-Induced Noise around a High-Speed Train Bogie in a Simplified Cavity
Publication: ICRT 2021
ABSTRACT
The bogie region has been identified as one of the important aerodynamic noise sources on a high-speed train. In this work, Computational Fluid Dynamics is used to simulate the flow around the bogie and the time-varying surface pressure is used as the input for the far field noise calculation which uses the Ffowcs Williams and Hawkings equation. The Delayed Detached Eddy Simulation method with Spalart-Allmaras turbulence model is used in the simulation of the unsteady flow field. In order to discretize the complex computational region of the bogie model, a hybrid mesh is used. The aerodynamic results show that the rear part of the bogie and its cavity have the strongest noise source intensity. The aeroacoustic results show that the cavity contributes more to the sound pressure level than the bogie does, and the sound energy is concentrated at the low frequencies.
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ACKNOWLEDGEMENTS
The work described here has been supported by the Ministry of Science and Technology of China under the National Key R&D Programme grant 2016YFE0205200, ‘Joint research into key technologies for controlling noise and vibration of high-speed railways under extremely complicated conditions’. All simulations were carried out on Iridis4 supercomputer at the University of Southampton.
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ICRT 2021
Pages: 65 - 72
Editors: Wanming Zhai, Ph.D., Southwest Jiaotong University, Kelvin C. P. Wang, Ph.D., Oklahoma State University, and Shengyang Zhu, Ph.D., Southwest Jiaotong University
ISBN (Online): 978-0-7844-8388-6
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© 2022 American Society of Civil Engineers.
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Published online: Feb 8, 2022
Published in print: Feb 8, 2022
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