Abstract
This study reports about the numerical simulation of the sheet flutter considering geometrical nonlinearity and wake shedding from trailing-edge. Recently, some studies of the energy harvesters using the flutter phenomenon were proposed. Previous researches employed some numerical models which are given by two dimensional flow or slender body approximation to evaluate this energy harvester. These models have a limitation in application range of the aspect ratio. We employ the three dimensional flutter model which is modeled by the finite element method with Absolute Nodal Coordinate Formulation: ANCF and Unsteady Vortex Lattice Method: UVLM. The equation of motion for flexible sheet has the Kelvin–Voigt-type material damping. The wake is shed to satisfy the unsteady Kutta’s condition at trailing-edge. At first, our numerical model under the uniform flow was compared with the previous work to verify the reproducibility of the experimental results. Using the validated simulation model, we investigated the relationship between the material damping and behavior of flutter. We clarified that material damping affect the flutter behavior and the efficiency of energy harvest due to flutter.
