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Unsteady onflow effects on model train drag

Weinman, K.A. and Ehrenfried, K. (2022) Unsteady onflow effects on model train drag. In: 23rd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics, STAB. 23. STAB-DGLR-Symposium 2022, 2022-11-09 - 2022-11-10, Berlin,Germany.

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Official URL: https://www.tu.berlin/index.php?id=27890

Abstract

The DLR NGT-Cargo concept aims to increase the rail share of the European freight traffic market. Computational Fluid Dynamics (CFD) is a useful tool in analysing high-speed operations which are an important part of this concept. Standards provide guidelines for CFD assessments at cross-wind conditions using the RANS (Reynolds-averaged Navier-Stokes) equations. The development of aerodynamic forces under unsteady on-flows should be analysed within the context of these standards. A major challenge in satisfying these guidelines arises because of the multi-scale nature of these flows which are characterized by a large range of energetically significant flow scales. Wind-tunnel measurements, focussed on the development of the aerodynamic forces acting on a train, are being currently performed on a 1:25 scaled NGT model in the cross-wind facility Seitenwindversuchsanlage G¨ottingen (SWG) located at the DLR G¨ottingen. A CFD study is running concurrently. The aim of this study is to assess the ability of CFD approaches to reproduce both the observed on-flow conditions as well as the aerodynamic drag of the vehicle. 1

Item URL in elib:https://elib.dlr.de/192181/
Document Type:Conference or Workshop Item (Speech)
Title:Unsteady onflow effects on model train drag
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Weinman, K.A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ehrenfried, K.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:November 2022
Journal or Publication Title:23rd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:STAB
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
UNSPECIFIEDSTABUNSPECIFIEDUNSPECIFIED
Status:Published
Keywords:Computational Fluid Dynamics, comparisons against exerimental drag measurement, force coefficient development, unsteady onflow, Delayed Detached Eddy Simulastio
Event Title:23. STAB-DGLR-Symposium 2022
Event Location:Berlin,Germany
Event Type:national Conference
Event Start Date:9 November 2022
Event End Date:10 November 2022
Organizer:STAB/DGLR
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Rail Transport
DLR - Research area:Transport
DLR - Program:V SC Schienenverkehr
DLR - Research theme (Project):V - NGT BIT (old)
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Weinman, Dr.phil. Keith
Deposited On:16 Dec 2022 13:24
Last Modified:24 Apr 2024 20:53

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