抄録
The present paper represents a series of experimental results on separation flow control by means of a plasma vortex generator. Typical conventional vortex generator is a vane normal to wall and has a yaw angle against a main flow. This yaw angle gives a penalty of drag increase at the sacrifice of the separation suppression. A plasma vortex generator developed here has a yaw angle of 0° and thus the penalty could be minimized. An exposed electrode was installed on the Kapton vane tip, and another electrode was embedded in the vane. This span-wise symmetrical structure produced a stream-wise counter-rotating vortices downstream from the vane. We investigated the effects of the plasma vortex generator on a turbulent boundary layer on a 20°-inclined slope. The separation flow was visualized using a smoke wire, and the velocity profiles were measured using a hot-wire anemometer. The plasma vortex generators suppressed the separation similarly as the conventional vortex generator, and its performance was validated.
