Numerical investigation of the effect of cavity flow on high speed train pantograph aerodynamic noise
Numerical investigation of the effect of cavity flow on high speed train pantograph aerodynamic noise
Reducing train pantograph noise is particularly important. In this paper, the flow behaviour and noise contribution of simplified
geometries representing high-speed train pantographs and the roof cavity at 1/10th scale are investigated. The Improved Delayed
detached-Eddy Simulation (IDDES) turbulent model is used for the flow field simulation and the Ffowcs Williams & Hawkings
aeroacoustic analogy is used for far-field noise prediction. The pantograph recess geometry is simplified to a rectangular cavity and
two simplified DSA350 pantographs are included. The effect of the pantograph cavity is studied by comparing the flow behaviour
and radiated noise from cases with and without the cavity, and also for different train running directions. When the pantographs are installed in a cavity, the shear layer, separated from the cavity leading edge, interacts with the pantographs, and generates large pressure fluctuations on the pantograph surfaces. In comparison with pantographs installed on a flat train roof, the flow around the pantographs with the cavity has different characteristics in terms of the velocity profile upstream of the pantographs. The study shows that the main noise source is from the panhead of the raised pantograph which produces strong tonal noise and this noise source is affected by the cavity flow.
Aeroacoustics, Cavity flow, FW-H, High-speed train, IDDES, Pantograph, Pantograph recess
Kim, Hogun
59edd0de-2b60-4583-a550-424384a76732
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
June 2020
Kim, Hogun
59edd0de-2b60-4583-a550-424384a76732
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Kim, Hogun, Hu, Zhiwei and Thompson, David
(2020)
Numerical investigation of the effect of cavity flow on high speed train pantograph aerodynamic noise.
Journal of Wind Engineering and Industrial Aerodynamics, 201, [104159].
(doi:10.1016/j.jweia.2020.104159).
Abstract
Reducing train pantograph noise is particularly important. In this paper, the flow behaviour and noise contribution of simplified
geometries representing high-speed train pantographs and the roof cavity at 1/10th scale are investigated. The Improved Delayed
detached-Eddy Simulation (IDDES) turbulent model is used for the flow field simulation and the Ffowcs Williams & Hawkings
aeroacoustic analogy is used for far-field noise prediction. The pantograph recess geometry is simplified to a rectangular cavity and
two simplified DSA350 pantographs are included. The effect of the pantograph cavity is studied by comparing the flow behaviour
and radiated noise from cases with and without the cavity, and also for different train running directions. When the pantographs are installed in a cavity, the shear layer, separated from the cavity leading edge, interacts with the pantographs, and generates large pressure fluctuations on the pantograph surfaces. In comparison with pantographs installed on a flat train roof, the flow around the pantographs with the cavity has different characteristics in terms of the velocity profile upstream of the pantographs. The study shows that the main noise source is from the panhead of the raised pantograph which produces strong tonal noise and this noise source is affected by the cavity flow.
Text
JWEIA_Manuscript_HogunKim
- Accepted Manuscript
More information
Accepted/In Press date: 15 March 2020
e-pub ahead of print date: 8 April 2020
Published date: June 2020
Additional Information:
Funding Information:
This research project has been supported by the Iridis 4 and Lyceum High Performance Computing Facility at the University of Southampton .
Publisher Copyright:
© 2020
Keywords:
Aeroacoustics, Cavity flow, FW-H, High-speed train, IDDES, Pantograph, Pantograph recess
Identifiers
Local EPrints ID: 438984
URI: http://eprints.soton.ac.uk/id/eprint/438984
ISSN: 0167-6105
PURE UUID: 5fb500de-ef3d-4f91-a13d-803760f4a427
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Date deposited: 31 Mar 2020 16:30
Last modified: 17 Mar 2024 05:26
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Author:
Hogun Kim
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