Low Reynolds Number Stall Suppression with Dynamic Roughness

摘要

An experimental study was conducted to investigate the use of dynamic roughness to suppress stall on a NACA 0012 airfoil. Particle image velocimetry (PIV) data shows the ability of the dynamic roughness to maintain predominantly attached flow at higher angles of attack than can be reached when the dynamic roughness is not actuated. The influences of Reynolds number, roughness frequency, and roughness amplitude/height on the ability of dynamic roughness to control separation are examined.