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Aerodynamic noise from a train pantograph

Aerodynamic noise from a train pantograph
Aerodynamic noise from a train pantograph
Many studies have shown that when the speed of high speed trains exceeds around 300km/h, aerodynamic noise becomes the most significant noise source. The pantograph, or current collector, is mounted on the top of the train and is therefore not shielded by noise barriers. This study is focused on pantograph noise reduction using a computational approach. Due to the complex geometry of the pantograph and the fact that it is composed of a number of slender bodies, a component-based approach is adopted to ensure the feasibility of numerical simulations. Computational Fluid Dynamics calculations are carried out using a DDES model.
The far-field noise is calculated by using the Ffowcs Williams-Hawkings equation based upon the aerodynamic characteristics obtained in the near-field by the CFD model. The investigation concentrates on the sound generated by a circular cylinder, typical of the pantograph,
in cross-flow with various speeds and yaw angles. The simulated aerodynamic results give a commendable agreement with experimental results.
Liu, Xiaowan
ff6c96c0-00ed-4e65-8dc5-328a9caae666
Thompson, David J.
bca37fd3-d692-4779-b663-5916b01edae5
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Jurdic, Vincent
482e51b2-d6f0-4720-86ce-444fc4415085
Liu, Xiaowan
ff6c96c0-00ed-4e65-8dc5-328a9caae666
Thompson, David J.
bca37fd3-d692-4779-b663-5916b01edae5
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Jurdic, Vincent
482e51b2-d6f0-4720-86ce-444fc4415085

Liu, Xiaowan, Thompson, David J., Hu, Zhiwei and Jurdic, Vincent (2014) Aerodynamic noise from a train pantograph. The 21st International Congress on Sound and Vibration, China. 13 - 17 Jul 2014. 8 pp .

Record type: Conference or Workshop Item (Paper)

Abstract

Many studies have shown that when the speed of high speed trains exceeds around 300km/h, aerodynamic noise becomes the most significant noise source. The pantograph, or current collector, is mounted on the top of the train and is therefore not shielded by noise barriers. This study is focused on pantograph noise reduction using a computational approach. Due to the complex geometry of the pantograph and the fact that it is composed of a number of slender bodies, a component-based approach is adopted to ensure the feasibility of numerical simulations. Computational Fluid Dynamics calculations are carried out using a DDES model.
The far-field noise is calculated by using the Ffowcs Williams-Hawkings equation based upon the aerodynamic characteristics obtained in the near-field by the CFD model. The investigation concentrates on the sound generated by a circular cylinder, typical of the pantograph,
in cross-flow with various speeds and yaw angles. The simulated aerodynamic results give a commendable agreement with experimental results.

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More information

Published date: 13 July 2014
Venue - Dates: The 21st International Congress on Sound and Vibration, China, 2014-07-13 - 2014-07-17
Related URLs:
Organisations: Dynamics Group, Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 372749
URI: https://eprints.soton.ac.uk/id/eprint/372749
PURE UUID: c330cbbc-e851-4ba7-9da0-55330d566e04
ORCID for David J. Thompson: ORCID iD orcid.org/0000-0002-7964-5906

Catalogue record

Date deposited: 17 Dec 2014 11:41
Last modified: 15 Oct 2019 00:52

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