0902 定常ならびに周期性を有する渦の干渉過程

抄録

The purpose of the present paper is to study the flow structure induced by a combined type of actuator system which is composed of a synthetic jet and fixed vortex generator. The vortex structure downstream of the combined actuator was measured by a scanning stereo-scopic particle image velocimetry(SSPIV). An experiment was conducted in the two-dimensional channel flow with the aspect ratio of 12 and channel height of 10 mm where Reynolds number is 1300. Orifice diameter of synthetic jet is 1.0 mm and Stokes number based on the operation condition is 6.3-12.7. Non-dimensional stroke length is 2.7-16. Then, it is found that strong interaction between the two vortices introduces an effective vortex structure for flow control of the near-wall flow.