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Assessment of T-tail flutter using an enhanced potential flow theory approach and linearized frequency domain CFD data

Schäfer, Dominik und Arnold, Jürgen (2019) Assessment of T-tail flutter using an enhanced potential flow theory approach and linearized frequency domain CFD data. In: International Forum on Aeroelasticity and Structural Dynamics 2019, IFASD 2019. IFASD 2019 - International Forum on Aeroelasticity and Structural Dynamics, 2019-06-10 - 2019-06-13, Savannah, GA (USA).

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Kurzfassung

This paper aims at assessing the gain in accuracy for T-tail flutter point prediction obtained by a strip theory approach used to enhance common linear potential flow theory based unsteady aerodynamic forces. The common approach neglects unsteady aerodynamic forces induced by lifting surface inplane and roll motion, which are crucial for T-tail flutter. The strip theory approach computes these additional terms based on aerodynamic forces from a steady state reference condition and the modal data of the underlying structural model. The correction is done by superposing the additional terms with the aerodynamic forces from the standard procedure. Generalized aerodynamic forces produced by the common approach and the enhanced approach in addition to resulting flutter points and aerodynamic Modal Power Transfer matrices are compared to those computed with aerodynamic forces from the linearized frequency domain CFD solver TAU-LFD. Two Mach numbers of 0.4 and 0.69 are chosen for this assessment. The model for the study is a generic T-tail with unswept and non-tapered vertical and horizontal tail planes. Significant improvements of the flutter points of the T-tail for both Mach numbers can be achieved by the enhancement in relation to the CFD approach. A comparison of generalized aerodynamic forces and aerodynamic Modal Power Transfer values, however, reveals strengths and weaknesses of the method

elib-URL des Eintrags:https://elib.dlr.de/127888/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Assessment of T-tail flutter using an enhanced potential flow theory approach and linearized frequency domain CFD data
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Schäfer, DominikD.Schaefer (at) dlr.dehttps://orcid.org/0000-0002-2042-7525NICHT SPEZIFIZIERT
Arnold, JürgenJuergen.Arnold (at) dlr.dehttps://orcid.org/0000-0002-1751-7458NICHT SPEZIFIZIERT
Datum:Juni 2019
Erschienen in:International Forum on Aeroelasticity and Structural Dynamics 2019, IFASD 2019
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:T-tail flutter, unsteady aerodynamics, linearized frequency domain solver, strip theory
Veranstaltungstitel:IFASD 2019 - International Forum on Aeroelasticity and Structural Dynamics
Veranstaltungsort:Savannah, GA (USA)
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:10 Juni 2019
Veranstaltungsende:13 Juni 2019
Veranstalter :AIAA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Simulation und Validierung (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Aeroelastik > Aeroelastische Simulation
Hinterlegt von: Schäfer, Dominik
Hinterlegt am:09 Jul 2019 16:28
Letzte Änderung:24 Apr 2024 20:31

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