Original title: Unsteady aerodynamic forces measured on a fluttering profil
Authors: Vlček, Václav ; Zolotarev, Igor ; Kozánek, Jan
Document type: Papers
Conference/Event: Engineering Mechanics 2013 /19./, Svratka (CZ), 2013-05-13 / 2013-05-16
Year: 2013
Language: eng
Abstract: The evaluations of optical measurements of the flow field near the fluttering profile NACA0015 with two-degrees of freedom are presented. Mach number of the airflow was M = 0.21 and M = 0.45, the boundaries of the flutter occurrence. Aerodynamic forces acting on the profile were evaluated in the drag and lift components which enabled to obtain independently the forces corresponding to the upper and lower surfaces of the profile. Using the mentioned decomposition, the new information about mechanism of flutter properties was obtained. The force effects on the upper and lower surfaces are in opposite phases and they are partially eliminated as a result of the circulation around the profile. The cycle changes of this forces cause the permanent energy contribution from the airflow to the vibrating system.
Keywords: aeroelastic experiments; fluttering profile; self-excited vibrations; wind tunnel
Project no.: GA13-10527S (CEP)
Funding provider: GA ČR
Host item entry: Engineering Mechanics 2013, ISBN 978-80-87012-47-5, ISSN 1805-8256

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0225362

Permalink: http://www.nusl.cz/ntk/nusl-161309


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Research > Institutes ASCR > Institute of Thermomechanics
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