C. Hafien - Laboratory of mechanics of fluids, Faculty of Science of Tunis, ۱۰۶۰ Tunis cedex, Belvidère
A. Bourehla - Aviation School of Borj El-Amri (ASBA), B.P ۱۱۴۲, Tunisia
M. Bouzaiane - Laboratory of mechanics of fluids, Faculty of Science of Tunis, ۱۰۶۰ Tunis cedex, Belvidère

The passive control of flow-separation at averaged Reynolds Number (Re=۳.۴۲×۱۰۵) using self-adapting flexible-flaps in the upper side of the wing, is presented. The two-way Fluid-Structure Interaction (FSI) in an elastic-layer up on the airfoil (NACA ۰۰۱۲) is investigated numerically by Coupling between the Transient Structural and Fluid Flow (Fluent) in ANSYS-Workbench۱۴.۰. During the fluid-structure interaction, the transient deformation of the elastic-layer provokes the modification of the flow topology at large-scale. There are reductions of the size and intensity of the vortex-shedding and an increase in the Strouhal number. This explains the increase of the lift-to-drag ratio. The study of the flap flexibility shows that the deformation of the elastic-layer and the variation of aeronautical efforts are inversely proportional to the Young Modulus.

Flexible, flaps, Young modulus, Structure Interaction (FSI), Two, way Fluid, Dynamic mesh