Eventos Anais de eventos
EPTT 2024
14th Spring School on Transition and Turbulence
Analysis of Extreme Events in the Boundary Layer of a NACA0012 at High Angle of Attack
Submission Author:
Leandro Júnio Oliveira Silva , SP
Co-Authors:
Leandro Júnio Oliveira Silva, William Wolf
Presenter: Leandro Júnio Oliveira Silva
doi://10.26678/ABCM.EPTT2024.EPT24-0024
Abstract
We investigate the effects of adverse pressure gradients (APGs) on extreme events in the turbulent boundary layer (TBL) of a NACA0012 airfoil at 9 deg. angle of attack. A wall-resolved large-eddy simulation (LES) is performed for a Reynolds number Re = 400,000 and freestream Mach number M = 0.2. Boundary layer tripping is enforced near the leading edge to have bypass transition. Despite the high angle of attack, the mean flow remains attached over the airfoil suction side, although the adverse pressure gradient exhibits a steep rise towards the trailing edge. Results of a quadrant analysis for the Reynolds shear stress distribution show that sweeps are predominant near the wall, while ejections dominate in the outer region.
Keywords
Turbulent Boundary Layer, adverse pressure gradient, extreme events
