Název: Unsteady aerodynamic forces measured on a fluttering profil
Autoři: Vlček, Václav ; Zolotarev, Igor ; Kozánek, Jan
Typ dokumentu: Příspěvky z konference
Konference/Akce: Engineering Mechanics 2013 /19./, Svratka (CZ), 2013-05-13 / 2013-05-16
Rok: 2013
Jazyk: eng
Abstrakt: 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.
Klíčová slova: aeroelastic experiments; fluttering profile; self-excited vibrations; wind tunnel
Číslo projektu: GA13-10527S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Engineering Mechanics 2013, ISBN 978-80-87012-47-5, ISSN 1805-8256

Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0225362

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-161309


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference