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Representing large boundary layers in slipstream moving model tests

Sima, M. und Tietze, A. und Schulz, B. und Ehrenfried, Klaus (2016) Representing large boundary layers in slipstream moving model tests. Railways 2016, The Third International Conference on Railway Technology: Research, Development and Maintenance, 05. - 08. April 2016, Cagliari, Italy.

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Offizielle URL: http://www.civil-comp.com/conf/rw2016/rw2016.htm

Kurzfassung

When a train drives it induces airflow along the side of the train and behind it, commonly denoted as slipstream. The induced airflow will impact the surrounding in the vicinity of the passing train and can be hazardous for people and objects on platforms or trackside workers. Therefore there exist limits which the train must comply to get authorisation to be placed in service. In Europe the Technical Specification for Interoperability (TSI), which has the level of law, gives requirements to fulfil. The air speed is measured in full scale tests at a specific distance from the track centreline (3.0 m), at two heights (0.2 m and 1.4 m). The upper location is representative of platforms and the lower of trackside workers. The train should be the longest configuration; if operated with multiple coupled units, at least two units. Due to the highly stochastic nature of the flow many independent measurements are needed to get representative values of the induced air flow with reasonable accuracy. As a balance between practicality and accuracy, 20 independent measurements are required. It was seen in the EU project on railway aerodynamics AeroTRAIN [1, 2] that even low wind speeds have a noticeable influence on the measured values, why for valid measurements the ambient wind needs to be equal or less than 2 m/s, which again is a balance between practicality and accuracy.

elib-URL des Eintrags:https://elib.dlr.de/98881/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Representing large boundary layers in slipstream moving model tests
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Sima, M.Mikael.sima (at) se.transport.bombardier.comNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Tietze, A.Centre of Competence Aero- and Thermodynamics, Bombardier Transportation, GermanyNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schulz, B.Centre of Competence Aero- and Thermodynamics, Bombardier Transportation, GermanyNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Ehrenfried, Klausklaus.ehrenfried (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2016
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Name der Reihe:Conference Proceedings
Status:veröffentlicht
Stichwörter:Train, Slipstream, moving model, measurements, roughness elements, boundary layer generation, TSI
Veranstaltungstitel:Railways 2016, The Third International Conference on Railway Technology: Research, Development and Maintenance
Veranstaltungsort:Cagliari, Italy
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:05. - 08. April 2016
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Verkehr
HGF - Programmthema:Bodengebundener Verkehr (alt)
DLR - Schwerpunkt:Verkehr
DLR - Forschungsgebiet:V BF - Bodengebundene Fahrzeuge
DLR - Teilgebiet (Projekt, Vorhaben):V - Next Generation Train III (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Fluidsysteme, GO
Hinterlegt von: Bachmann, Barbara
Hinterlegt am:11 Jul 2018 14:01
Letzte Änderung:11 Jul 2018 14:01

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