Delaying leading edge vortex detachment by plasma flow control at topologically critical locations

Abstract

Leading edge vortices on flapping wings induce high transient lift during their growth phase and increase maneuverability at low flight speeds. A hypothesis is developed and experimentally validated that the vortex growth phase on a pitching and plunging airfoil can be prolonged with dielectric barrier discharge plasma actuators. This is demonstrated for various airfoils and for different motion dynamics and kinematics.