Maio 2014 vol. 1 num. 1 - 10th World Congress on Computational Mechanics

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AN OBJECT-ORIENTED UNSTEADY VORTEX LATTICE METHOD FOR AEROELASTIC ANALYSES OF HIGHLY FLEXIBLE WINGS.

Souza, E. de ; Silva, R. G. A. da ; Cesnik, C. E. S. ;

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This paper presents studies about aerodynamic modeling for aeroelastic analyses of composite laminated flexible wings subjected to large displacements. An unsteady vortexlattice method (UVLM) is used, aiming reduction in computational costs when comparing with higher order CFD solutions. The UVLM has the advantage of being computationally simple, especially for complex configurations and for incompressible flow. Lifting surfaces subject to large angle of attack are very common in rotary wings area, but can also be important in the case of flapping wings in forward flight, where local fluid velocity components can lead to an effective angle of attack larger than the profile static stall limit. Since the vortex-lattice method is a potential method, without viscous effects, the boundary layer separation can not be captured. An engineering approach is then used to modify directly the pressure distribution based on an effective angle of attack calculated at each vortex-ring element. Applications to flat plate surfaces show good agreement with theory, and can predict hysteretic behavior in time response analyses. Application examples showing the ability to deal with multiple surfaces in rotary motion are also presented.

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Palavras-chave: Unsteady Vortex-Lattice, stall model, large displacements, large rotations.,

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DOI: 10.5151/meceng-wccm2012-18712

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Como citar:

Souza, E. de; Silva, R. G. A. da; Cesnik, C. E. S.; "AN OBJECT-ORIENTED UNSTEADY VORTEX LATTICE METHOD FOR AEROELASTIC ANALYSES OF HIGHLY FLEXIBLE WINGS.", p. 2064-2083 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-18712

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