Abstract
It is important to understand and control wake structure behind three dimensional bluff bodies. The purpose of this study is to investigate the wake structures behind a circular disk and that excited by flow disturbance. Dielectric barrier discharge (DBD) plasma actuator placed on the side surface of the circular disk was used to generate flow disturbance. In Reynolds number of 5,000 and 10,000, mean velocities of streamwise, circumferential and radial direction are measured by X-type hot wire probe. Excited wake structure behind a circular disk was educed from these three velocity components.
