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Analysis of the unsteady loads on train models in windtunnels

Heine, Daniela and Ehrenfried, Klaus and Gries, Torsten and Heine, Gerrit and Müller, Max (2022) Analysis of the unsteady loads on train models in windtunnels. In: 23rd STAB/DGLR Symposium on New Results in Numerical and Experimental Fluid Mechanics. 23. STAB-DGLR-Symposium 2022, 2022-11-09 - 2022-11-10, Berlin, Deutschland.

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

Abstract

Climate change leads to adverse weather and wind conditions. These condi-tions may result in high loads on ground vehicles, especially trains and cars. For trains, crosswind forces as well as drag are subject to research. However, the study of unsteady loads requires extensive simulation of the unsteady in-coming flow conditions. Within the work presented in this paper, the loads on two different train models were analyzed experimentally using a specialized technique of gust generation in the wind tunnel. The loads were studied depending on the fre-quency and amplitude of sinusoidal gusts. The tests showed that mean loads measured with unsteady wind conditions exceed the loads during steady wind conditions in most specific test parame-ters. Especially the frequency of the gusts is crucial for the drag and cross-wind forces. The drag rises with increasing gust frequency. The crosswind forces have a maximum for a certain frequency. For this frequency, the wavelength of the gusts equals the train length leading to higher loads. In up-coming tests the influence of the gusts on the crosswind forces and the drag will be studied with an initial rotational angle of the train model.

Item URL in elib:https://elib.dlr.de/192145/
Document Type:Conference or Workshop Item (Speech)
Title:Analysis of the unsteady loads on train models in windtunnels
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Heine, DanielaUNSPECIFIEDhttps://orcid.org/0000-0001-7967-5542UNSPECIFIED
Ehrenfried, KlausUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gries, TorstenUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Heine, GerritUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Müller, MaxUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
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:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
UNSPECIFIEDSTABUNSPECIFIEDUNSPECIFIED
Status:Published
Keywords:unsteady loads, experimental simulation, crosswind force, drag
Event Title:23. STAB-DGLR-Symposium 2022
Event Location:Berlin, Deutschland
Event Type:international 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 - RoSto - Rolling Stock
Location: Göttingen
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Ground Vehicles
Deposited By: Heine, Daniela
Deposited On:20 Dec 2022 15:24
Last Modified:24 Apr 2024 20:53

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