Fully Coupled Aeroelastic Analyses of Wing Flutter towards Application to Complex Aircraft Configurations

Aeroelastic instabilities are some of the critical issues affecting reliability and safety military commercial aircraft. In this study, a coupled computational fluid dynamics structural (CFD-CSD) capability was developed for transonic aeroelasticity analysis in time domain. To expedite application CFD solver aeroelastic simulations, morphing technique mesh deformation CFD, eliminating successive calling grid generator. The solution then tightly with CSD by fully implicit method. three-dimensional (3D) is finite element model solving 3D elasticity equations using second-order tetrahedron elements. coupling between aerodynamic loads elastic deflections based on spline matrices radial basis functions. results from CFD-CSD simulations two-dimensional (2D) rigid airfoil AGARD 445.6 wing reasonable agreement experimental data available public Also, reported paper highlight importance viscous effects Mach numbers at above dip, thereby highlighting necessity to use Navier-Stokes-based as opposed Euler. It shown that enables consideration complex aircraft configurations such underwing stores, which can be flutter sensitivity studies.