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Relevance of whirl flutter for electric aircraft configurations

Koch, Christopher (2020) Relevance of whirl flutter for electric aircraft configurations. DLRK 2020 - Deutscher Luft- und Raumfahrtkongress, 2020-09-01 - 2020-09-03, Online.

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Kurzfassung

In this paper, the relevance of propeller whirl flutter for (hybrid-) electric aircraft configurations is outlined. These new configurations in form of air taxis and commuter aircrafts often include propeller which are powered by lightweight electric motors and located at remote locations, e.g. the wing tip. This gives rise to an aeroelastic instability called whirl flutter, involving the gyroscopic whirl modes of the engine. The driving parameters for this instability are the dynamics of the mounting structure. Using a generic whirl flutter model of a propeller at the tip of a lifting surface, parameter studies on the flutter stability are carried out. The aeroelastic model consists of a dynamic MSC.Nastran beam model coupled with the unsteady ZAERO ZONA6 aerodynamic model and strip theory for the propeller aerodynamics. The parameter studies focus on the influence of different substructures (ranging from local engine mount stiffness to global aircraft dynamics) on the aeroelastic stability of the propeller. The results show a strong influence of the level of detail of the aeroelastic model on the flutter behaviour. The coupling with the lifting surface is of major importance, as it can stabilise the whirl flutter mode. Including wing unsteady aerodynamics into the analysis can also change the whirl flutter behaviour. This stresses the importance of including whirl flutter in the aeroelastic stability analysis on aircraft level.

elib-URL des Eintrags:https://elib.dlr.de/139569/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Relevance of whirl flutter for electric aircraft configurations
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Koch, ChristopherChristopher.Koch (at) dlr.dehttps://orcid.org/0000-0001-8014-3041NICHT SPEZIFIZIERT
Datum:September 2020
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:aeroelasticity, electric aircraft, flutter stability, propeller, whirl flutter
Veranstaltungstitel:DLRK 2020 - Deutscher Luft- und Raumfahrtkongress
Veranstaltungsort:Online
Veranstaltungsart:nationale Konferenz
Veranstaltungsbeginn:1 September 2020
Veranstaltungsende:3 September 2020
Veranstalter :DGLR - Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal Oberath e.V.
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Simulation und Validierung (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik > Aeroelastische Simulation
Hinterlegt von: Koch, Christopher
Hinterlegt am:18 Dez 2020 16:54
Letzte Änderung:24 Apr 2024 20:40

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