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LINEAR FREQUENCY DOMAIN PREDICTIONS OF DYNAMIC DERIVATIVES FOR THE DLR F12 WIND TUNNEL MODEL

Widhalm, Markus und Hübner, Andreas R. und Thormann, Reik (2012) LINEAR FREQUENCY DOMAIN PREDICTIONS OF DYNAMIC DERIVATIVES FOR THE DLR F12 WIND TUNNEL MODEL. ECCOMAS 2012, 10-14 Sept 2012, Vienna, Austria.

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Kurzfassung

Structural loads for full aircraft configurations can be represented by evaluating dynamic derivatives over a wide parameter space mainly including different mode shapes, an- gle of attack and Mach numbers. Traditionally, these values are determined by wind tunnel tests applying forced periodic motions to aircraft models. The ability of numerical simula- tions provide an excellent addendum to wind tunnel tests. Instead of time-accurate unsteady Reynolds-averaged Navier-Stokes (URANS) solvers which are recognized as extremely compu- tational expensive this paper considers a linearized frequency domain solver (LFD). With this approach the unsteady simulation reduces to a single steady state computation and a single linear simulation in the frequency domain. By the assumption of small perturbations and har- monic oscillations dynamic derivatives can be computed efficiently within a wide parameter space. In addition, the theoretical background for the LFD will be presented. Based on the linearization of the RANS equations and modeling of small perturbations with Fourier series a complex valued linear system has to be solved.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:LINEAR FREQUENCY DOMAIN PREDICTIONS OF DYNAMIC DERIVATIVES FOR THE DLR F12 WIND TUNNEL MODEL
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Widhalm, Markusmarkus.widhalm@dlr.de
Hübner, Andreas R.andreas.huebner@dlr.de
Thormann, Reikreik.thormann@dlr.de
Datum:September 2012
Referierte Publikation:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:unsteady aerodynamics, flutter analysis, linearization, frequency domain
Veranstaltungstitel:ECCOMAS 2012
Veranstaltungsort:Vienna, Austria
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:10-14 Sept 2012
Veranstalter :Eccomas
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Simulation & Validierung
Standort: Braunschweig
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > C²A²S²E - Center for Computer Applications in AeroSpace Science and Engineering
Hinterlegt von: Markus Widhalm
Hinterlegt am:20 Sep 2012 16:16
Letzte Änderung:11 Jan 2013 15:46

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