Paper Information

Journal:   JOURNAL OF APPLIED FLUID MECHANICS (JAFM)   2016 , Volume 9 , Number 5; Page(s) 2569 To 2580.
 
Paper: 

PASSIVE SEPARATION CONTROL ON A SYMMETRIC AIRFOIL VIA ELASTIC-LAYER

 
 
Author(s):  HAFIEN C.*, BOUREHLA A., BOUZAIEN M.
 
* LABORATORY OF MECHANICS OF FLUIDS, FACULTY OF SCIENCE OF TUNIS, 1060 TUNIS CEDEX, BELVIDERE
 
Abstract: 

The passive control of flow-separation at averaged Reynolds Number (Re=3.42×105) 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 0012) is investigated numerically by Coupling between the Transient Structural and Fluid Flow (Fluent) in ANSYS-Workbench14.0. 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.

 
Keyword(s): FLEXIBLE-FLAPS, YOUNG MODULUS, TWO-WAY FLUID-STRUCTURE INTERACTION (FSI), DYNAMIC MESH
 
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