Müller, Max und Ehrenfried, Klaus und Wagner, Claus (2022) Pressure Force Response on a Sphere in Unsteady Flow with Sinusoidally Alternating Crosswind. In: Proceedings of GALA 2022, 23.1-23.8. Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V.. GALA Fachtagung "Experimentelle Strömungsmechanik" 2022, 06.-09. Sept. 2022, Ilmenau, Deutschland. ISBN 978-3-9816764-8-8. ISSN 2194-2447.
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Kurzfassung
The response forces on a sphere in sinusoidal cross winds with frequencies between 20 Hz and 50 Hz and small amplitudes (<3°) derived from surface pressure measurements have been investigated in wind tunnel experiments. Two different undisturbed inflow velocities were considered, which lead to a sub- and a supercritical flow separation pattern. The amplitude of the side force response was found to depend linearly on the amplitude of the inflow angle and grows non-linearly with increasing reduced frequency. The phase angle between inflow and side force response increases linearly with the reduced frequency. Both the amplitude and the phase angle of the side force response collapse on a single trend for the sub- and supercritical flow separation, hence the trend is only a function of the reduced frequency. Calculating a virtual point of force application, where the force is in phase with the inflow angle, it was shown that this point is independent of the reduced frequency.
elib-URL des Eintrags: | https://elib.dlr.de/187693/ | ||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||
Zusätzliche Informationen: | https://www.gala-ev.org/images/Beitraege/Beitraege2022/index.html | ||||||||||||||||||||
Titel: | Pressure Force Response on a Sphere in Unsteady Flow with Sinusoidally Alternating Crosswind | ||||||||||||||||||||
Autoren: |
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Datum: | 6 September 2022 | ||||||||||||||||||||
Erschienen in: | Proceedings of GALA 2022 | ||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||
In SCOPUS: | Nein | ||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||
Seitenbereich: | 23.1-23.8 | ||||||||||||||||||||
Herausgeber: |
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Verlag: | Deutsche Gesellschaft für Laser-Anemometrie - German Association for Laser Anemometry GALA e.V. | ||||||||||||||||||||
ISSN: | 2194-2447 | ||||||||||||||||||||
ISBN: | 978-3-9816764-8-8 | ||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||
Stichwörter: | pressure force answer, admittance, unsteady inflow | ||||||||||||||||||||
Veranstaltungstitel: | GALA Fachtagung "Experimentelle Strömungsmechanik" 2022 | ||||||||||||||||||||
Veranstaltungsort: | Ilmenau, Deutschland | ||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||
Veranstaltungsdatum: | 06.-09. Sept. 2022 | ||||||||||||||||||||
Veranstalter : | Deutsche Gesellschafft für Laser-Anemometrie GALA e.V. | ||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||
HGF - Programm: | Verkehr | ||||||||||||||||||||
HGF - Programmthema: | Schienenverkehr | ||||||||||||||||||||
DLR - Schwerpunkt: | Verkehr | ||||||||||||||||||||
DLR - Forschungsgebiet: | V SC Schienenverkehr | ||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | V - NGT BIT (alt) | ||||||||||||||||||||
Standort: | Göttingen | ||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Bodengebundene Fahrzeuge | ||||||||||||||||||||
Hinterlegt von: | Müller, Max | ||||||||||||||||||||
Hinterlegt am: | 07 Dez 2022 14:50 | ||||||||||||||||||||
Letzte Änderung: | 29 Mär 2023 00:51 |
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