Mechanics & Industry
Volume 17, Number 6, 2016
|Number of page(s)||12|
|Published online||07 July 2016|
Flap/lead-lag computational investigations on NREL S809 airfoil
1 Centre de Développement des Energies
Renouvelables, CDER, 16340
2 Laboratoire des Sciences Aéronautiques, Institut d’Aéronautique et Études Spatiales, Université de Blida 1, Algeria
a Corresponding author:
Accepted: 18 December 2015
This paper aims at getting some insight into aeroelastic instabilities on NREL S809 airfoil. The study is based on the solution of the Unsteady Reynolds Averaged Navier-Stokes (URANS) equations where turbulence is modelled using a two-equation SST k-ω model. Preliminary fluid flow computations are performed for a fixed airfoil set at various angles of attack. The results showed good agreement with experimental data found in the literature. Flow induced-vibrations on the airfoil are then investigated using a strong coupling fluid-structure interaction approach. The URANS equations are then defined in Arbitrary Lagrangian-Eulerian (ALE) coordinates. Simulations are carried out for flap/lead-lag free oscillations. All computations are performed in 2D domain in which the governing equations are solved considering an incompressible flow and a Reynolds number based on airfoil chord Re = 3.33 × 105 to Re = 2 × 106.
Key words: Wind turbine / URANS / S809 airfoil / ALE / Fluid-Structure Interaction
© AFM, EDP Sciences 2016
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