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Application of Time-Variant Systems Theory to the Unsteady Aerodynamics of Rotary Wings

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/
Dokumentart:Zeitschriftenbeitrag
Titel:Application of Time-Variant Systems Theory to the Unsteady Aerodynamics of Rotary Wings
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Quero, DavidDavid.QueroMartin (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum: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:12 Sep 2024 12:41

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