Simulations of a plunging airfoil at Re=60,000 find that 2D leading-edge actuation in a certain frequency band disrupts the stall vortex, raising suction-side pressure near the trailing edge to reduce drag while preserving lift.
Orlandi, A numerical method for direct simulation of turbulence in complex geometries, CTR Annual Research Briefs , 215–229 (1989)
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Active Flow Control for Drag Reduction of a Plunging Airfoil under Deep Dynamic Stall
Simulations of a plunging airfoil at Re=60,000 find that 2D leading-edge actuation in a certain frequency band disrupts the stall vortex, raising suction-side pressure near the trailing edge to reduce drag while preserving lift.