LES Study of the Three-Dimensional Behaviour of Unswept Wing Sections at Buffet Conditions

Abstract

Recent high-fidelity simulations of airfoils at transonic buffet conditions have shown great potential to study the detailed mechanism of this low-frequency unsteadiness, which limits the flight envelope of modern aircraft (Dandois et al. in J Fluid Mech 850:156-178, 2018 [1]; Zauner et al. in AIAA J 57(2):597-607, 2019 [9]). However, due to the high resolution of direct numerical simulations (DNS) that is required even at moderate Reynolds numbers (Zauner et al. in AIAA J 57(2):597-607, 2019 [9]), both the run time and domain width were limited.