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Aeroelastic Stability of Flat Rectangular Shell Structures in High Subsonic and Low Supersonic Flow

Lübker, Jannis (2020) Aeroelastic Stability of Flat Rectangular Shell Structures in High Subsonic and Low Supersonic Flow. Dissertation. DLR-Forschungsbericht. DLR-FB-2020-45, 245 S.

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Abstract

Shells exposed to supersonic flow can become aeroelastically unstable under certain flow conditions caused by negative aerodynamic damping. The resulting aerodynamic loads depend on the flow’s Mach number and its Reynolds number. Experiments were performed in the Transonic Wind Tunnel Göttingen on rectangular and flat plates. Using a forced excitation approach, the structural parameters amplitude and excitation frequency were varied for two simulated eigenmode shapes. High-resolution pressure and deformation measurements allowed the determination of the local pressure responses and the global Generalized Aerodynamic Forces. The influences of the parameters on the resulting pressure response could be determined under subsonic and supersonic flow conditions. Characteristic changes in the transition to supersonic flow were found. All domains measured in supersonic flow showed a positive aerodynamic damping of the aeroelastic system.

Item URL in elib:https://elib.dlr.de/141170/
Document Type:Monograph (DLR-Forschungsbericht, Dissertation)
Additional Information:Ebenfalls erschienen unter: TU Braunschweig – Niedersächsisches Forschungszentrum für Luftfahrt, Berichte aus der Luft- und Raumfahrttechnik, Forschungsbericht 2020-16
Title:Aeroelastic Stability of Flat Rectangular Shell Structures in High Subsonic and Low Supersonic Flow
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Lübker, JannisJannis.Luebker (at) dlr.deUNSPECIFIED
Date:2020
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:2020
Number of Pages:245
Series Name:DLR Forschungsbericht
ISSN:1434-8454
Status:Published
Keywords:Transonic Wind Tunnel Göttingen, forced motion experiment, aeroelastic stability, panelflutter, subsonic and supersonic flow, generalized aerodynamic forces
Institution:Technische Universität Braunschweig
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):Experimentelle Methoden zur Raumfahrzeugauslegung (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Experiments
Deposited By: Lübker, Jannis
Deposited On:01 Mar 2021 14:55
Last Modified:01 Mar 2021 14:55

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