Article (Scientific journals)
Unsteady aerodynamic modeling methodology based on dynamic mode interpolation for transonic flutter calculations
Güner, Hüseyin; Thomas, David; Dimitriadis, Grigorios et al.
2019In Journal of Fluids and Structures, 84, p. 218-232
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Keywords :
unsteady aerodynamics; computational fluid dynamics; dynamic mode decomposition; transonic; flutter; aeroelasticity
Abstract :
[en] A new unsteady aerodynamic modeling methodology for calculating transonic flutter characteristics is presented. The main idea of the methodology is to obtain the unsteady flow response to small amplitude periodic deformations of a structure over a large range of oscillation frequencies through the interpolation of the most dominant fluid dynamic modes obtained from Dynamic Mode Decomposition (DMD) of a few reference unsteady simulations at different oscillation frequencies. These simulations can be carried out by solving the Euler or RANS equations. The methodology can then be used to obtain a frequency-domain generalized aerodynamic force matrix, and stability analysis can be performed using standard flutter analysis methods such as the p-k method. The proposed methodology provides a very good estimate of the flutter boundary for the 2D Isogai airfoil and 3D AGARD 445.6 wing models, but at a lower computational cost than the traditional higher-fidelity Fluid-Structure Interaction (FSI) simulations.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Güner, Hüseyin ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
Thomas, David ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
Dimitriadis, Grigorios ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Interactions Fluide-Structure - Aérodynamique expérimentale
Terrapon, Vincent  ;  Université de Liège - ULiège > Département d'aérospatiale et mécanique > Modélisation et contrôle des écoulements turbulents
Language :
English
Title :
Unsteady aerodynamic modeling methodology based on dynamic mode interpolation for transonic flutter calculations
Publication date :
January 2019
Journal title :
Journal of Fluids and Structures
ISSN :
0889-9746
eISSN :
1095-8622
Publisher :
Elsevier, Atlanta, Georgia
Volume :
84
Pages :
218-232
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 November 2018

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