Braukmann, Johannes N. und Schwarz, Clemens und Wolf, Christian und Buron, Elizabeth und Koch, Stefan und Buske, Gerrit und Gardner, Anthony (2023) BOS and Hot-Film Analysis of a CH-53G Helicopter Wake in Ground Effect. In: 79th Vertical Flight Society Annual Forum and Technology Display, FORUM 2023, Seiten 1-15. Vertical Flight Society. Vertical Flight Society Forum 79 2023, 2023-05-16 - 2023-05-18, West Palm Beach, Florida, USA. doi: 10.4050/F-0079-2023-18181. ISBN 978-171387479-9.
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Offizielle URL: https://vtol.org/annual-forum/forum-79-proceedings?paperSort=title
Kurzfassung
Constant temperature anemometry and background-oriented schlieren (BOS) measurements on a CH-53G helicopter (take off mass x 14t) are used to investigate the rotor wake including the vortex breakdown to statistical turbulence. Hovering flights at a range of hub heights O.50 < h < 0.83 were investigated. The position of the rotorcraft was optically tracked using markers affixed to the fuselage. A complete breakdown of the tip vortices was noted within 0.3fl of the rotor plane, in stark qualitative contrast to small scale experiments wich show the tip vortices persisting to the ground plane. The large (37m2) BOS field of view showed a small effect of vortex pairing and blade vortex interaction, which was overshadowed by the rapid wake breakdown. Vortex pairing was found to result from varying vortex convection velocities rather than from differences in the vortex spacing due to the blade track.
elib-URL des Eintrags: | https://elib.dlr.de/196402/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||||||||||
Titel: | BOS and Hot-Film Analysis of a CH-53G Helicopter Wake in Ground Effect | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 18 Mai 2023 | ||||||||||||||||||||||||||||||||
Erschienen in: | 79th Vertical Flight Society Annual Forum and Technology Display, FORUM 2023 | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||||||
DOI: | 10.4050/F-0079-2023-18181 | ||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 1-15 | ||||||||||||||||||||||||||||||||
Herausgeber: |
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Verlag: | Vertical Flight Society | ||||||||||||||||||||||||||||||||
ISBN: | 978-171387479-9 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | BOS, turbulence, ground effect, helicopter wake, vortex decay | ||||||||||||||||||||||||||||||||
Veranstaltungstitel: | Vertical Flight Society Forum 79 2023 | ||||||||||||||||||||||||||||||||
Veranstaltungsort: | West Palm Beach, Florida, USA | ||||||||||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||||||
Veranstaltungsbeginn: | 16 Mai 2023 | ||||||||||||||||||||||||||||||||
Veranstaltungsende: | 18 Mai 2023 | ||||||||||||||||||||||||||||||||
Veranstalter : | Vertical Flight Society | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programm: | Luftfahrt | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Effizientes Luftfahrzeug | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Luftfahrt | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | L EV - Effizientes Luftfahrzeug | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | L - Virtueller Hubschrauber und Validierung | ||||||||||||||||||||||||||||||||
Standort: | Braunschweig , Göttingen | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Hubschrauber, GO Flugexperimente > Projektmanagement Flugexperimente BS Institut für Aerodynamik und Strömungstechnik > Hochgeschwindigkeitskonfigurationen, GO | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Koch, Bianca | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 16 Aug 2023 14:35 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 31 Okt 2024 10:13 |
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