Abstract
The aim of this study is to introduce streamwise vortex pairs generated by plasma actuator jet into separated shear layer from a circular cylinder. The electrodes of the plasma actuator installed on the surface of the circular cylinder were arranged in the spanwise direction. Induced jets by the actuators collided each other and roll-up into streamwise vortex pairs. Flow visualizations in still air and in the wake region of the cylinder were performed by a high speed camera and PIV analysis. It was found that the streamwise vortex pairs interacted with the vortex structure in separated shear layer from the circular cylinder.
