Quero, David (2024) Application of Time-Variant Systems Theory to the Unsteady Aerodynamics of Rotary Wings. AIAA Journal. American Institute of Aeronautics and Astronautics (AIAA). doi: 10.2514/1.J064078. ISSN 0001-1452.
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Offizielle URL: https://doi.org/10.2514/1.J064078
Kurzfassung
This work employs the principles of time-variant systems theory to investigate the unsteady aerodynamics of rotary-wing configurations under periodic equilibrium conditions. Their application enables an extension of the pulse technique for system identification, as well as the adaptation of the linear-frequency-domain formulation commonly utilized in fixed-wing to rotary-wing scenarios. These methodologies effectively incorporate the aerodynamic nonlinearities associated with the equilibrium state into an efficient time-variant linearized representation of the unsteady aerodynamics. To promote its application in the context of rotary-wing aeroelasticity, a state-space realization based on a periodic autoregressive model with exogenous input is subsequently employed. Upon transformation from discrete to continuous time, the resulting aerodynamic model adopts a linear continuous-time periodic state-space formulation, offering compatibility for its coupling with a wide range of structural models. The proposed aerodynamic framework tailored to rotary-wing aeroelasticity holds applicability across a spectrum of aerodynamic models of arbitrary complexity, spanning from incompressible potential flow approximations to potentially more sophisticated methods. Showcasing the potential of this framework, the widely studied lossy Mathieu equation and the aerodynamic response to a flap perturbation about the periodic equilibrium condition of a prototypical rotor blade section, incorporating nonlinearities through an analytical dynamic stall model, are considered.
elib-URL des Eintrags: | https://elib.dlr.de/205937/ | ||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||
Titel: | Application of Time-Variant Systems Theory to the Unsteady Aerodynamics of Rotary Wings | ||||||||
Autoren: |
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Datum: | 13 August 2024 | ||||||||
Erschienen in: | AIAA Journal | ||||||||
Referierte Publikation: | Ja | ||||||||
Open Access: | Nein | ||||||||
Gold Open Access: | Nein | ||||||||
In SCOPUS: | Ja | ||||||||
In ISI Web of Science: | Ja | ||||||||
DOI: | 10.2514/1.J064078 | ||||||||
Verlag: | American Institute of Aeronautics and Astronautics (AIAA) | ||||||||
ISSN: | 0001-1452 | ||||||||
Status: | veröffentlicht | ||||||||
Stichwörter: | Unsteady aerodynamics, rotary wings, linear time-periodic, linear frequency domain, pulse technique | ||||||||
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 - Virtuelles Flugzeug und Validierung | ||||||||
Standort: | Göttingen | ||||||||
Institute & Einrichtungen: | Institut für Aeroelastik > Aeroelastische Simulation | ||||||||
Hinterlegt von: | Quero-Martin, David | ||||||||
Hinterlegt am: | 21 Aug 2024 12:29 | ||||||||
Letzte Änderung: | 11 Nov 2024 14:49 |
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