Implicit LES Simulations of a Flexible Flapping Wing

A high-order (up to 6th order) Navier-Stokes solver is coupled with a structural solver that decomposes the equations of three-dimensional elasticity into cross-sectional, smalldeformation and spanwise, large-deformation analyses for slender wings. The resulting high-fidelity aeroelastic solver is applied to the investigation of both a rigid and moderately flexible rectangular wing undergoing a pure plunging motion. Comparisons of the computed results demonstrate good agreement with available experimental measurements. A description of the complex interaction between the unsteady aerodynamics and the flexible wing structural dynamics is given. Connections between the results of this analysis and the enhanced aerodynamic loads for the flexible wing are made.

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