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Numerical analysis of flow-induced nonlinear vibrations of an airfoil with three degrees of freedom
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SYSNO ASEP 0362740 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Numerical analysis of flow-induced nonlinear vibrations of an airfoil with three degrees of freedom Author(s) Feistauer, M. (CZ)
Horáček, Jaromír (UT-L) RID, ORCID
Růžička, M. (CZ)
Sváček, P. (CZ)Source Title Computers & Fluids. - : Elsevier - ISSN 0045-7930
Roč. 49, č. 1 (2011), s. 110-127Number of pages 18 s. Language eng - English Country GB - United Kingdom Keywords aeroelasticity ; Navier-Stokes equation ; non-linear oscillations ; flutter instability Subject RIV BI - Acoustics R&D Projects GAP101/11/0207 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z20760514 - UT-L (2005-2011) UT WOS 000293941100010 DOI 10.1016/j.compfluid.2011.05.004 Annotation The subject of the paper is the numerical simulation of the interaction of 2D incompressible viscous flow and an airfoil vibrating with large amplitudes. The numerical simulation consists of the FE solution of the Navier-Stokes equations coupled with a system of nonlinear ordinary differential equations describing the airfoil motion. The time-dependent computational domain is treated by the ALE method and by a suitable stabilization of the FE discretization. We analyze the convergence of the method, if the computational mesh is refined and the time step is successively decreased. Also the effect of the loose and strong coupling of the flow and structure problems is tested. The applicability of the method is demonstrated by the comparison with NASTRAN computations and the solution of the coupled fluid-structure problem with increasing far-field velocity up to and behind the flutter instability. The developed method can be used in theoretical prediction of dynamic behaviour of aeroelastic systems especially when the stability has been lost. 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 2012 Electronic address http://www.sciencedirect.com/science/article/pii/S0045793011001538
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