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Assessment of the mesh refinement influence on the computed flow-fields about a model train in comparison with wind tunnel measurements

Weinman, K.A and Fragner, M.M and Deiterding, Ralf and Heine, Daniela and Fey, Uwe and Braenstroem, F. and Schultz, B. and Wagner, Claus (2018) Assessment of the mesh refinement influence on the computed flow-fields about a model train in comparison with wind tunnel measurements. Journal of Wind Engineering and Industrial Aerodynamics, 179, pp. 102-117. Elsevier. DOI: 10.1016/j.jweia.2018.05.005 ISSN 0167-6105

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Official URL: http://dx.doi.org/10.1016/j.jweia.2018.05.005

Abstract

A consistent mesh refinement study, relating to the prediction of aerodynamic forces about an experimentally validated reference train geometry, is presented in this paper. The flow about a high-speed train has a multi-scale character which poses challenges for the design of computationally effective meshes. The purpose of this study is to assist in the development of guidelines for effective drag prediction of high-speed trains using numerical simulation. These guidelines should assist CFD practitioners by identifying the regions of the mesh that are critical for the correct estimation of drag as well as providing information on appropriate mesh characteristics, such as volume and surface element length scales. Numerical assessments are validated against an experimental drag measurement program and the extent to which RANS is sufficiently predictive for industrial design is discussed. The results obtained in the work suggest that the mesh about the train nose is essential for the proper assessment of the aerodynamic drag acting on the vehicle.

Item URL in elib:https://elib.dlr.de/120360/
Document Type:Article
Additional Information:Online: 28. Mai 2018
Title:Assessment of the mesh refinement influence on the computed flow-fields about a model train in comparison with wind tunnel measurements
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Weinman, K.Akeith.weinman (at) dlr.deUNSPECIFIED
Fragner, M.MHochschule HannoverUNSPECIFIED
Deiterding, RalfUniversity of SouthamptonUNSPECIFIED
Heine, Danieladaniela.heine (at) dlr.deUNSPECIFIED
Fey, Uweuwe.fey (at) dlr.deUNSPECIFIED
Braenstroem, F.Bombardier Transportation GmbH.UNSPECIFIED
Schultz, B.Bombardier Transportation GmbH.UNSPECIFIED
Wagner, Clausclaus.wagner (at) dlr.deUNSPECIFIED
Date:August 2018
Journal or Publication Title:Journal of Wind Engineering and Industrial Aerodynamics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:179
DOI :10.1016/j.jweia.2018.05.005
Page Range:pp. 102-117
Publisher:Elsevier
Series Name:Elsevier
ISSN:0167-6105
Status:Published
Keywords:Aerodynamic drag; Mesh refinement; Mesh sensitivity; PIV
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - Next Generation Train III (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Weinman, Dr.phil. Keith
Deposited On:27 Jun 2018 09:55
Last Modified:06 Sep 2019 15:28

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