Some experimentally determined properties of a profile in case of self-excited oscillations in subsonic flow

0472537 - ÚT 2018 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Vlček, Václav - Zolotarev, Igor - Kozánek, Jan - Šidlof, Petr - Štěpán, M.
Some experimentally determined properties of a profile in case of self-excited oscillations in subsonic flow.
DYMAMESI 2017. Prague: Institute of Thermomechanics AS CR, v. v. i., 2017 - (Kozieň, M.; Pešek, L.; Zolotarev, I.), s. 115-122. ISBN 978-80-87012-62-8.
[DYMAMESI 2017. Cracow (PL), 28.02.2017-01.03.2017]
Grant ostatní: AV ČR(CZ) StrategieAV21/3
Program: StrategieAV
Institucionální podpora: RVO:61388998
Klíčová slova: airfoil * aeroelasciticy * dynamic stall * stall flutter * limit cycle oscillations * self -excited vibrations
Obor OECD: Acoustics

In the wind tunnel of the Institute of Thermomechanics of the AS CR,v .v. i., experiments were realized with the profile NACA0015 in the presence of the self-excited oscillation. The oscillation of the profile with pitch and plunge degrees of freedom was excited by the subsonic air flow. The plunge support had the same elasticity for all experiments, the pitch support had seven different values of elasticity. Within experiments different types of self-excited vibration (flutter, stall flutter, deep stall flutter) were realized. Range of Mach numbers were M=0.08–0.45, when the chord length is used as the characteristic dimension of the profile. The frequency and amplitude characteristics of the oscillating profile were experimentally determined.

Trvalý link: http://hdl.handle.net/11104/0273610