Methodology development for coupled aeroelastic analysis of wing flutter
An integrated computational fluid dynamics and computational structural dynamics (CFD CSD) approach is being developed for the simulation and prediction of transonic flutter. The CFD solver was based on an unsteady, parallel, multi block, multi grid, structured, finite volume algorithm for the Euler/Navier Stokes equations. The solution of the flowfield is coupled with the structural dynamics by a fully implicit method. The twodimensional (2D) CSD solver is based on the time integration of a two degree of freedom (two DOF) structural model while the three dimensional (3D) CSD solver is a finite element model. The coupled CFD CSD method simulates the elastic system directly in the time domain to determine the stability and response of the aeroelastic system.