Manipulation of Leading-Edge Vortex Flow

At very high angles of attack, the leading-edge vortex of a semi-slender delta wing becomes unsteady and collapses, endangering the flight stability. Active flow control by pulsed blowing stabilizes the vortex system, enlarging the flight envelope for such wing configurations. The reattachment of the separated shear layer during post-stall causes a lift increase of more than 50% and offers a great perspective for active flow control in aeronautical applications. However, the interactions of shear layer vortices with the jet-induced vortices are complex. This paper attempts to shed a light on the flow field response to pulsed blowing at the leading edge of a generic half delta wing model with a 65∘ sweep angle based on detached eddy simulations.     «

At very high angles of attack, the leading-edge vortex of a semi-slender delta wing becomes unsteady and collapses, endangering the flight stability. Active flow control by pulsed blowing stabilizes the vortex system, enlarging the flight envelope for such wing configurations. The reattachment of the separated shear layer during post-stall causes a lift increase of more than 50% and offers a great perspective for active flow control in aeronautical applications. However, the interactions of shea...     »