The effect of a moving ground on the flow and aerodynamic noise behaviour of a simplified high-speed train bogie
The effect of a moving ground on the flow and aerodynamic noise behaviour of a simplified high-speed train bogie
Aeroacoustic sources around the train bogie area are particularly important but involve complex flow. In this study, a numerical investigation is presented of the effect of a moving ground on the flow and aeroacoustic noise behaviour of a train bogie. These make use of the delayed detached-eddy simulation combined with an acoustic analogy for noise prediction. First the flow around an isolated wheelset (1:5 scale) is calculated when it is in proximity to the ground and this is compared with wind-tunnel measurements to verify the simulation. Then the flow and aerodynamic noise behaviour of a simplified high-speed train bogie at scale 1:10 with and without the ground underneath are studied numerically. It is found that a highly turbulent flow is generated within the bogie cavity and the ground increases the noise levels by 6-8 dB due to a combination of acoustic reflection from the ground and modifications to the flow
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Zhu, J.Y.
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Hu, Z.W.
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Thompson, D.J.
bca37fd3-d692-4779-b663-5916b01edae5
Zhu, J.Y.
4fd6be3f-f28d-429c-96ec-f4498f109081
Hu, Z.W.
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Thompson, D.J.
bca37fd3-d692-4779-b663-5916b01edae5
Zhu, J.Y., Hu, Z.W. and Thompson, D.J.
(2016)
The effect of a moving ground on the flow and aerodynamic noise behaviour of a simplified high-speed train bogie.
International Journal of Rail Transportation, .
(doi:10.1080/23248378.2016.1212677).
Abstract
Aeroacoustic sources around the train bogie area are particularly important but involve complex flow. In this study, a numerical investigation is presented of the effect of a moving ground on the flow and aeroacoustic noise behaviour of a train bogie. These make use of the delayed detached-eddy simulation combined with an acoustic analogy for noise prediction. First the flow around an isolated wheelset (1:5 scale) is calculated when it is in proximity to the ground and this is compared with wind-tunnel measurements to verify the simulation. Then the flow and aerodynamic noise behaviour of a simplified high-speed train bogie at scale 1:10 with and without the ground underneath are studied numerically. It is found that a highly turbulent flow is generated within the bogie cavity and the ground increases the noise levels by 6-8 dB due to a combination of acoustic reflection from the ground and modifications to the flow
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- Accepted Manuscript
More information
Accepted/In Press date: 11 July 2016
e-pub ahead of print date: 27 July 2016
Organisations:
Aeronautics, Astronautics & Comp. Eng
Identifiers
Local EPrints ID: 398662
URI: http://eprints.soton.ac.uk/id/eprint/398662
ISSN: 2324-8378
PURE UUID: 8dd960bf-b0ab-4d70-973b-1f274dde5a18
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Date deposited: 29 Jul 2016 13:30
Last modified: 15 Mar 2024 05:46
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Author:
J.Y. Zhu
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