The effects of turbulence modeling on dynamic stall

• DOI: 10.48550/arxiv.2404.14172
• Publication Date: 2024-04-22
• Authors: Giacomo Baldan; Francesco Manara; Gregorio Frassoldati; Alberto Guardone
• Keywords: Stall (fluid mechanics)

A numerical investigation of the flow evolution over a pitching NACA 0012 airfoil incurring in deep dynamic stall phenomena is presented. The experimental data at Reynolds number Re = 135 000 and reduced frequency k 0.1, provided by Lee Gerontakos, are compared to simulations using different turbulence models. After preliminary space time convergence study, two- three-dimensional URANS with models explored, highlighting advantages drawbacks. Then, turbulence-resolving capabilities hybrid RANS/LES strategies exploited recover better represent vortex. In detail, Scale-Adaptive Simulations (SAS) Stress-Blended Eddy (SBES) adopted. Furthermore, LES resolved portion allows spectral analysis force moment coefficients investigate contribution lower than one. Finally, comparison proposed approaches other given.