High-Order Spectral/hp Compressible Large Eddy Simulation of Transonic Buffet Over a Supercritical Aerofoil

This study investigates transonic buffet over a supercritical aerofoil using implicit wall-resolved large eddy simulations (iWRLES) conducted with the high-order spectral/hp element framework Nektar++. The ONERA OAT15A aerofoil, a widely studied benchmark, is used to explore the unsteady shock wave-boundary layer interaction. The simulations capture the unsteady shock oscillations and match the experimental shock location more accurately than conventional Reynolds-Averaged Navier-Stokes (RANS) models. The effects of inflow turbulence were also investigated, offering a deeper insight into the onset of transonic buffet with respect to the turbulence boundary layer transition.