The University of Southampton
University of Southampton Institutional Repository

Flow simulation and aerodynamic noise prediction for a high-speed train wheelset

Flow simulation and aerodynamic noise prediction for a high-speed train wheelset
Flow simulation and aerodynamic noise prediction for a high-speed train wheelset
Aerodynamic noise becomes significant for high-speed trains and its prediction in an industrial context is hard to achieve. The aerodynamic and aeroacoustic behaviour of the flow past a highspeed train wheelset, one of the main components of a bogie, are investigated at a scale 1:10 using a two-stage hybrid method of computational fluid dynamics and acoustic analogy. The near-field unsteady flow is obtained by solving the Navier-Stokes equations numerically through delayed detached-eddy simulations and the results are fed to predict the far-field noise signals using the Ffowcs Williams-Hawkings acoustic analogy. Far-field sound radiated from the scaled model is also measured in a low noise open-jet anechoic wind tunnel. Good agreement is achieved between numerical and experimental results for the dominant frequency of tonal noise and the shape of the spectra. Results show that turbulent flow past the wheelset is characterized by three-dimensional streamwise and spanwise vortices with various scales and orientations. Vortex shedding and flow separation around the wheelset are the key factors for the aerodynamic noise generation. It is found that the radiated tonal noise corresponds to the dominant frequencies of the oscillating lift and drag forces from the wheelset. The directivity of the noise radiated exhibits a typical dipole pattern. As the inflow velocity increases, the shedding frequency scales with the freestream velocity and the axle diameter to yield a Strouhal number of 0.18 while the noise levels increase noticeably. For the current wheelset case investigated without considering the ground effect, the inclusion of wheelset rotation increases the radiated noise levels slightly with similar directivity
1475-472X
533-552
Zhu, Jianyue
bde9cd8b-e917-4e15-beb6-e9251c1b9133
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Thompson, D.J.
bca37fd3-d692-4779-b663-5916b01edae5
Zhu, Jianyue
bde9cd8b-e917-4e15-beb6-e9251c1b9133
Hu, Zhiwei
dd985844-1e6b-44ba-9e1d-fa57c6c88d65
Thompson, D.J.
bca37fd3-d692-4779-b663-5916b01edae5

Zhu, Jianyue, Hu, Zhiwei and Thompson, D.J. (2014) Flow simulation and aerodynamic noise prediction for a high-speed train wheelset. International Journal of Aeroacoustics, 13 (7-8), 533-552. (doi:10.1260/1475-472X.13.7-8.533).

Record type: Article

Abstract

Aerodynamic noise becomes significant for high-speed trains and its prediction in an industrial context is hard to achieve. The aerodynamic and aeroacoustic behaviour of the flow past a highspeed train wheelset, one of the main components of a bogie, are investigated at a scale 1:10 using a two-stage hybrid method of computational fluid dynamics and acoustic analogy. The near-field unsteady flow is obtained by solving the Navier-Stokes equations numerically through delayed detached-eddy simulations and the results are fed to predict the far-field noise signals using the Ffowcs Williams-Hawkings acoustic analogy. Far-field sound radiated from the scaled model is also measured in a low noise open-jet anechoic wind tunnel. Good agreement is achieved between numerical and experimental results for the dominant frequency of tonal noise and the shape of the spectra. Results show that turbulent flow past the wheelset is characterized by three-dimensional streamwise and spanwise vortices with various scales and orientations. Vortex shedding and flow separation around the wheelset are the key factors for the aerodynamic noise generation. It is found that the radiated tonal noise corresponds to the dominant frequencies of the oscillating lift and drag forces from the wheelset. The directivity of the noise radiated exhibits a typical dipole pattern. As the inflow velocity increases, the shedding frequency scales with the freestream velocity and the axle diameter to yield a Strouhal number of 0.18 while the noise levels increase noticeably. For the current wheelset case investigated without considering the ground effect, the inclusion of wheelset rotation increases the radiated noise levels slightly with similar directivity

Text
IJA 13(7&8) 2014.pdf - Version of Record
Download (2MB)

More information

Published date: December 2014
Organisations: Dynamics Group, Aerodynamics & Flight Mechanics Group

Identifiers

Local EPrints ID: 373443
URI: https://eprints.soton.ac.uk/id/eprint/373443
ISSN: 1475-472X
PURE UUID: 0ff97187-2e06-4c50-9aa9-8b31fc554072
ORCID for D.J. Thompson: ORCID iD orcid.org/0000-0002-7964-5906

Catalogue record

Date deposited: 19 Jan 2015 09:30
Last modified: 29 Aug 2019 00:51

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×