Vortex-flow manipulation on a generic delta-wing configuration

The manipulation of characteristic vortex-flow instabilities, which occur in the flow around delta wings, is of great interest for increasing the performance of such configurations. This work presents experimental results of vortex-flow manipulation on a generic delta-wing configuration using pulsed blowing slot actuators along the leading edge. The frequencies of the examined blowing cases are chosen on the basis of unsteady characteristics that occur in the shearlayer roll-up during vortex formation and vortex breakdown. The results of hot-wire measurements substantiate the receptivity of the shear layer for the pulsed excitation until into the vortex core. The flowfield response to this periodic forcing is shown by the displacement of the vortex bursting location in a chordwise direction, thus satisfying the aim of enhancing the aerodynamic performance.