Vibrating Profile in the Aerodynamic Tunnel — Identification of the Start of Flutter

0436414 - ÚT 2015 RIV US eng J - Článek v odborném periodiku
Kozánek, Jan - Vlček, Václav - Zolotarev, Igor
Vibrating Profile in the Aerodynamic Tunnel — Identification of the Start of Flutter.
Journal of Applied Nonlinear Dynamics. Roč. 3, č. 4 (2014), s. 317-323. ISSN 2164-6457
Grant CEP: GA ČR GA13-10527S
Institucionální podpora: RVO:61388998
Klíčová slova: profile in airflow * Mach numbers * limits of the aeroelastic stability * spectral identification
Kód oboru RIV: BI - Akustika a kmity

The experimental results for the vibrating NACA0015 profile elastically supported in a translation and rotation for a set of increasing Mach numbers of the airflow are presented. The profile was placed in the aerodynamic tunnel of the Institute of Thermomechanics ASCR. The support properties of the profile were modified by three additional masses to control the eigenfrequencies corresponding to transversal vibrations and verified by the identification of the complex eigenvalues (eigenfrequencies, damping) for zero flow velocity in laboratory. The transversal free vibrations as the time functions are graphically depicted for stable vibrations and in the cases of the starting flutter. The start of the flutter was determined from free vibrations of kinematically excited profile. The complex eigenvalues were identified as the functions ofMach number including corresponding limits of the system aeroelastic stability.
Trvalý link: http://hdl.handle.net/11104/0240554