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Prediction of Transonic Flutter Behavior of a Supercritical Airfoil Using Reduced Order Methods

Banavara, Nagaraj and Dimitrov, Diliana (2014) Prediction of Transonic Flutter Behavior of a Supercritical Airfoil Using Reduced Order Methods. In: New results in numerical and experimental fluid mechanics IX Notes on numerical fluid mechanics and multidisciplinary design, 124. Springer-Verlag. pp. 365-373. ISBN 978-3-319-03158-3.

Full text not available from this repository.

Official URL: http://link.springer.com/chapter/10.1007/978-3-319-03158-3_37

Abstract

The flutter behavior of a supercritical airfoil is investigated using a panel formulation, which solves the subsonic unsteady linearized small-disturbance integral equations. Linear aerodynamic theories provide good predictions for attached moderately subsonic and supersonic flows but break down in the transonic flow conditions due to the nonlinearities inherent in unsteady transonic flow. These nonlinearities dominate the transonic flutter behavior typically resulting in the so-called transonic dip. Time-domain aeroelastic simulations involving Computational Fluid Dynamics (CFD) are computationally very expensive and are not favored when a large number of simulations are required. It is a common practice to correct the unsteady aerodynamics calculated from linear formulations to account for the flow nonlinearities associated with unsteady transonic flows. A Reduced Order Method (ROM) is presented yielding to complex-valued aerodynamic corrections for vibration modes. This ROM is used in linear frequency-domain flutter analyses.

Item URL in elib:https://elib.dlr.de/88319/
Document Type:Contribution to a Collection
Additional Information:Contributions to the 18th STAB/DGLR Symposium, Stuttgart, Germany, 2012
Title:Prediction of Transonic Flutter Behavior of a Supercritical Airfoil Using Reduced Order Methods
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Banavara, Nagarajnagaraj.banavara (at) dlr.deUNSPECIFIED
Dimitrov, Dilianadiliana.dimitrov (at) dlr.deUNSPECIFIED
Date:January 2014
Journal or Publication Title:New results in numerical and experimental fluid mechanics IX
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:124
Page Range:pp. 365-373
Editors:
EditorsEmail
Dillmann, AndreasUNSPECIFIED
Heller, GerdUNSPECIFIED
Krämer, EwaldUNSPECIFIED
Kreplin, Hans-PeterUNSPECIFIED
Nitsche, WolfgangUNSPECIFIED
Rist, UlrichUNSPECIFIED
Publisher:Springer-Verlag
Series Name:Notes on numerical fluid mechanics and multidisciplinary design
ISBN:978-3-319-03158-3
Status:Published
Keywords:Flutter, transonic flow, Reduced order method
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulations
Deposited By: Friedewald, Diliana
Deposited On:28 Jul 2014 15:31
Last Modified:28 Jul 2014 15:31

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