Abstract
It is important to understand and control the wake structure behind three dimensional bluff bodies for various engineering applications. The purpose of this study is to investigate the effect of disturbances on the wake structure behind a circular disk. Small attack angle of the circular disk was added as a static disturbance. Also the plasma jet generated by a dielectric barrier discharge (DBD) plasma actuator was used as a dynamic disturbance. Mean velocities of streamwise, circumferential and radial direction were measured by X-type hot wire probe. Wake structure behind a circular disk was educed from these three velocity components.
