Jet Vectoring and Enhancement of Flow Control Performance of Trielectrode Plasma Actuator Utilizing Sliding Discharge

Abstract

The flow control performance and jet vectoring characteristics of trielectrode (TED) plasma actuators on quiescent air were analyzed. To examine the body force generated from the actuator, the thrust of the induced jet was measured, as a reaction of the aerodynamic force from the actuator. The corresponding induced jet was visualized by means of highspeed Schrielen Visualization with the discharge conditions to understand physical phenomena on the actuator. The experiments show that the thrust generated by the TED actuator depended on the applied DC voltage. By applying high negative DC voltage, with the existence of sliding discharge channels between the two exposed electrodes, the induced flow becomes in the pronounced vertical jet. The overall thrust is greatly improved from SDBD actuator at these regimes. The efficiency of SDBD actuator also shows substantial improvement. These confirm that the TED actuator could improve both body force and their power efficiency at the same time.