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Flutter Assessment of a Double-Swept Rotor Blade in Hover Based on Indicial Aerodynamics Considering Blade Profile, Rotor Inflow and Wake Periodicity

Arnold, Jürgen (2022) Flutter Assessment of a Double-Swept Rotor Blade in Hover Based on Indicial Aerodynamics Considering Blade Profile, Rotor Inflow and Wake Periodicity. VFS Aeromechanics for Advanced Vertical Flight Technical Meeting, 2022-01-25 - 2022-01-27, San Jose, USA.

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Kurzfassung

The ERATO rotor blade is assessed for flutter stability in hover. For the aeroelastic analyses, the multibody model is tightly-coupled with an unsteady aerodynamic model based on Wagner's function and related enhancements for the general motion of an airfoil section considering heave and pitch. The mathematical setup of the Wagner function is extended for axial flow to include unsteady contributions related to rotor inflow and wake periodicity. Since the unsteady aerodynamic model is based on indicial functions, a separation of these contributions is possible and allows to study their individual impact on rotor blade flutter. According flutter results are extracted in frequency domain for three test cases which differ in the unsteady aerodynamic model for circulation comprising blade profile, rotor inflow and wake periodicity. In addition to the classical bending-torsion coupling which is well known for articulated straight rotor blades, the double-swept ERATO blade exhibits a critical flutter coupling which is composed of two elastic flap bending modes. Due to the forward and backward sweep of the blade layout, these elastic flap modes introduce further torsional blade motion into the aeroelastic coupling.

elib-URL des Eintrags:https://elib.dlr.de/188271/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Flutter Assessment of a Double-Swept Rotor Blade in Hover Based on Indicial Aerodynamics Considering Blade Profile, Rotor Inflow and Wake Periodicity
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Arnold, JürgenJuergen.Arnold (at) dlr.dehttps://orcid.org/0000-0002-1751-7458NICHT SPEZIFIZIERT
Datum:Januar 2022
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Aeroelastik, Flatterstabilität, ERATO Rotorblatt
Veranstaltungstitel:VFS Aeromechanics for Advanced Vertical Flight Technical Meeting
Veranstaltungsort:San Jose, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:25 Januar 2022
Veranstaltungsende:27 Januar 2022
Veranstalter :VFS - 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: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik > Aeroelastische Simulation
Hinterlegt von: Arnold, Dipl.-Ing. Jürgen
Hinterlegt am:19 Sep 2022 14:57
Letzte Änderung:24 Apr 2024 20:49

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