Prediction of low-speed aerodynamic load and aeroacoustic noise around simplified panhead section model

Jongsoo Lee, W. Cho

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

This paper deals with a low-speed aerodynamic and aeroacoustic analysis of the two-dimensional panhead section model that is a simplification of the pantograph used in high-speed railway (HSR). As a preliminary study of HSR whose actual operating speed is over 300 km/h, the present study considers the low-speed aerodynamics and aeroacoustics in which the speed range is between 120 and 180 km/h. The computational fluid dynamics-based analysis is performed using FLUENT and the low-speed wind tunnel test is conducted to verify the flow simulation as well. The aerodynamic noise is predicted using Ffowcs Williams-Hawkings equation without the quadrupole term. The present study suggests the use of a thin plate (i.e. lift generator) to generate the positive up-lift force that can provide the stable aerodynamic contact between the panhead strips and the catenary system. For a number of panhead section models, acoustic pressure fluctuations and sound pressure levels are analysed to identify the optimum plate length of the lift generator in terms of aerodynamic stability and aeroacoustic noise reduction.

Original languageEnglish
Pages (from-to)423-431
Number of pages9
JournalProceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit
Volume222
Issue number4
DOIs
Publication statusPublished - 2008 Nov 6

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Aeroacoustics
Aerodynamic loads
Acoustic noise
Aerodynamics
Aerodynamic stability
Pantographs
Gas generators
Flow simulation
Noise abatement
Wind tunnels
Computational fluid dynamics
Acoustics
Acoustic waves

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

Cite this

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abstract = "This paper deals with a low-speed aerodynamic and aeroacoustic analysis of the two-dimensional panhead section model that is a simplification of the pantograph used in high-speed railway (HSR). As a preliminary study of HSR whose actual operating speed is over 300 km/h, the present study considers the low-speed aerodynamics and aeroacoustics in which the speed range is between 120 and 180 km/h. The computational fluid dynamics-based analysis is performed using FLUENT and the low-speed wind tunnel test is conducted to verify the flow simulation as well. The aerodynamic noise is predicted using Ffowcs Williams-Hawkings equation without the quadrupole term. The present study suggests the use of a thin plate (i.e. lift generator) to generate the positive up-lift force that can provide the stable aerodynamic contact between the panhead strips and the catenary system. For a number of panhead section models, acoustic pressure fluctuations and sound pressure levels are analysed to identify the optimum plate length of the lift generator in terms of aerodynamic stability and aeroacoustic noise reduction.",
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