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Numerical Simulations of Nonlinear Post-Critical Vibrations of an Airfoil After Flutter Instability
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SYSNO ASEP 0361340 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Numerical Simulations of Nonlinear Post-Critical Vibrations of an Airfoil After Flutter Instability Author(s) Horáček, Jaromír (UT-L) RID, ORCID
Feistauer, M. (CZ)
Sváček, P. (CZ)ISBN 978-0-7918-4454-0 Source Title Proceedings of the ASME 2011 PVP Conference. - Baltimore : ASME, 2011 - ISBN 978-0-7918-4454-0 Pages s. 435-444 Number of pages 10 s. Publication form Print - P Action ASME 2011 Pressure Vessels & Piping Division Conference Event date 17.07.2011-21.07.2011 VEvent location Baltimore Country US - United States Event type WRD Language eng - English Country US - United States Keywords aeroelasticita ; FEM ; 3-DOF airfoil Subject RIV BI - Acoustics R&D Projects GAP101/11/0207 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000320410300052 DOI 10.1115/PVP2011-57466 Annotation The contribution deals with the numerical simulation of the flutter of airfoil with three degrees of freedom for rotation around an elastic axis, oscillation in the vertical direction and rotation of a flap. The FE solution of (2-D) incompressible Navier-Stokes equations is coupled with nonlinear equations describing the airfoil vibrations with large amplitudes taking into account the nonlinear mass matrix. The time-dependent computational domain and a moving grid are treated by the ALE method. The developed method was successfully tested by the flutter computation using NASTRAN program and then applied to the simulations of the post flutter regimes in time domain showing Limit Cycle Oscillations (LCO) for the airfoil NACA 0012 respecting the air space between the flap and the main airfoil. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2015
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