Passive Separation Control on a Symmetric Airfoil via Elastic-Layer

The passive control of flow-separation at averaged Reynolds Number (Re=3.42x105) 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 bet...

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Bibliographic Details
Published in:Journal of Applied Fluid Mechanics 2016, Vol.9 (5), p.2569-2580
Main Authors: Hafien, Chedhli, Bourehla, Adnen, Bouzaiane, M
Format: Article
Language:English
Subjects:
Aerodynamics
Airfoils
Computational fluid dynamics
Deformation
Elastic deformation
flexible-flaps
young modulus
two-way fluid-structure interaction (fsi)
dynamic mesh
Flow separation
Fluid flow
Fluid mechanics
Fluid-structure interaction
Mechanical properties
Modulus of elasticity
Passive control
Reduction
Reynolds number
Separation
Strouhal number
Topology
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Summary:The passive control of flow-separation at averaged Reynolds Number (Re=3.42x105) 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.
ISSN:1735-3572
1735-3645
DOI:10.18869/acadpub.jafm.68.236.25141