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A field based assessment of the aerodynamics of operational freight trains

Quazi, Ariq and Crouch, Timothy and Thompson, Mark and McGreevy, Tony and Bell, James and Burton, David (2020) A field based assessment of the aerodynamics of operational freight trains. In: Proceedings of the 22nd Australasian Fluid Mechanics Conference (AFMC2020) (113), pp. 1-4. The University of Queensland. 22nd Australasian Fluid Mechanics Conference AFMC2020, 7-10 December 2020, Brisbane, Australia. doi: 10.14264/f1674aa. ISBN 9781742723419.

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Official URL: https://espace.library.uq.edu.au/view/UQ:f1674aa

Abstract

A novel field based method for analysing the aerodynamic pressure drag acting on intermodal freight trains is presented. A full-scale 48ft shipping container was instrumented with surface pressure taps and loaded onto a number of single and doublestacked container freight trains that operate between Melbourne and Perth, Australia (a distance of 3,500km). Container surface pressure data enabled the instrumented container pressure drag coefficient to be evaluated for a range of different train loading configurations, container positions along the train and atmospheric wind conditions. Field based measurements show that for low wind conditions surface pressure distributions measured on the front and base faces of the instrumented container are synonymous with those reported on in past studies. However, the magnitude of the pressure drag coefficient was found to be approximately 50% lower for all loading cases analysed compared with previous analogous wind-tunnel and numerical investigations. For high wind conditions the drag coefficient was generally found to increase and this change in the drag coefficient was well correlated with the level of asymmetry observed in the measured pressure distributions. In the absence of direct information of the incident free-stream wind conditions, the level of asymmetry in the pressure distributions is found to provide a viable indirect method for assessing the impact that cross-winds have on the aerodynamics of freight trains.

Item URL in elib:https://elib.dlr.de/139772/
Document Type:Conference or Workshop Item (Speech)
Title:A field based assessment of the aerodynamics of operational freight trains
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Quazi, AriqMonash UniversityUNSPECIFIED
Crouch, Timothytimothy.crouch (at) monash.eduUNSPECIFIED
Thompson, Markmark.thompson (at) monash.eduUNSPECIFIED
McGreevy, Tonytony_mcgreevy (at) pacificnational.com.auUNSPECIFIED
Bell, JamesJames.Bell (at) dlr.dehttps://orcid.org/0000-0001-8319-9817
Burton, Daviddavid.burton (at) monash.eduUNSPECIFIED
Date:2020
Journal or Publication Title:Proceedings of the 22nd Australasian Fluid Mechanics Conference (AFMC2020)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.14264/f1674aa
Page Range:pp. 1-4
Editors:
EditorsEmailEditor's ORCID iD
Chanson, HubertUNSPECIFIEDUNSPECIFIED
Brown, RichardUNSPECIFIEDUNSPECIFIED
Publisher:The University of Queensland
ISBN:9781742723419
Status:Published
Keywords:Aerodynamics; freight trains; full-scale experiments; field study; surface pressure.
Event Title:22nd Australasian Fluid Mechanics Conference AFMC2020
Event Location:Brisbane, Australia
Event Type:international Conference
Event Dates:7-10 December 2020
Organizer:The University of Queensland, Queensland University of Technology (QUT)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Transport und Klima
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Bell, Dr. James
Deposited On:17 Dec 2020 16:10
Last Modified:17 Dec 2020 16:10

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