NUMERICAL UNSTEADY AERODYNAMICS FOR TURBOMACHINERY AEROELASTICITY

This paper presents ONERA's recent advances in the experimental and numeri- cal understandings about the aeroelastic stability of aeronautical turbomachiner- ies. Numerical features of a quasi-3D and a 3D Navier-Stokes unsteady aeroelas- tic solver are discussed: turbulence models, grid deformation techniques, spe- cific boundary conditions, dual time stepping. A dynamically coupled fluid- structure numerical scheme is presented. Isolated profile, rectilinear cascades computational results are compared to experimental data. Results of aeroelastic Navier-Stokes computations for 3D fans are shown.