Résumé
The simulation of unsteady flows characterized by large separations induced by adverse pressure gradient is still a challenge at high Reynolds numbers. For such simulations, hybrid models are those favored due to the cost/accuracy compromise they offer. In this study, we assess, next to the DDES approach, the performance of two hybrid models for the prediction of the flow around a circular cylinder at Reynoldsnumbers 106 and 2 × 106, and the flow over a NACA0021 airfoil in a deep stall at Reynolds number 270000. These hybrid models combine either a RANS model or the DDES approach with the dynamic variational multiscale (DVMS) model for the large eddy simulation. A mesh adaptation procedure is currently being applied for the NACA0021 benchmark, with the aim of improving the prediction of the aerodynamic andaeroacoustic characteristics of the flow, such as the airfoil selfnoise generation and propagation.