DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

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.

[img] PDF - Postprint version (accepted manuscript)

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


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
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
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 ISI Web of Science:No
EditorsEmailEditor's ORCID iDORCID Put Code
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
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

Repository Staff Only: item control page

Help & Contact
electronic library is running on EPrints 3.3.12
Website and database design: Copyright © German Aerospace Center (DLR). All rights reserved.