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Aeroelastic stability assessment of a V-tail with integrated propulsion units

Koch, Christopher and Arnold, Jürgen (2020) Aeroelastic stability assessment of a V-tail with integrated propulsion units. In: Proceedings of the Second International Symposium on Flutter and its Application, pp. 82-91. Second International Symposium on Flutter and its Application, 12.-14. Mai 2020, Konferenz wurde abgesagt.

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Abstract

This paper deals with the aeroelastic stability assessment of the empennage section of the hybrid-electric motor glider FVA 30. Because of its integrated propulsion units at the tips it is prone to a special kind of aeroelastic instability called whirl flutter. This instability involves the whirl modes of the propellers. Parameter studies regarding the most important structural parameters are carried out to evaluate the design space and identify critical flutter modes. The models are also checked for empennage flutter and ground resonance. Due to the early design phase this is done by numerical studies with simplified models using the DLR in-house flutter process, PySTAB, and strip theory propeller aerodynamics. The investigations show the possibility of a V-tail-flutter due to insufficient mass balance of the combined elevator/rudder control surface. In contrast, the empennage structure shows large margins regarding whirl flutter of the tailplane structure itself. The pylon and engine mount are assumed to be rigid though due to lacking design data. Ground resonance of the elastic propeller blades is prohibited by the dynamics due to blade twist.

Item URL in elib:https://elib.dlr.de/135150/
Document Type:Conference or Workshop Item (Speech)
Title:Aeroelastic stability assessment of a V-tail with integrated propulsion units
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Koch, ChristopherChristopher.Koch (at) dlr.deUNSPECIFIED
Arnold, JürgenJuergen.Arnold (at) dlr.deUNSPECIFIED
Date:May 2020
Journal or Publication Title:Proceedings of the Second International Symposium on Flutter and its Application
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 82-91
Editors:
EditorsEmailEditor's ORCID iD
Hémon, PascalLaboratoire d'hydrodynamiqueUNSPECIFIED
Amandolese, XavierConservatoire national des arts et métiersUNSPECIFIED
Status:Published
Keywords:aeroelastic stability, motor glider, V-tail, whirl flutter
Event Title:Second International Symposium on Flutter and its Application
Event Location:Konferenz wurde abgesagt
Event Type:international Conference
Event Dates:12.-14. Mai 2020
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aeroelasticity > Aeroelastic Simulations
Deposited By: Koch, Christopher
Deposited On:20 Aug 2020 09:21
Last Modified:20 Aug 2020 09:21

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