LAUSR

Abstract The interaction between a ramp induced shock wave and a plasma synthetic jet actuator (PSJA) array was experimentally investigated using high-speed schlieren imaging technique. The PSJA array consisting of 10 actuators was driven by only one power supply. To enhance the actuation intensity, the actuators were located along the streamwise direction to form an accumulation effect. Experimental results showed that the plasma synthetic jet can penetrate into the supersonic flow field with a depth of more than 10 mm. Both the induced shock and the controlling gas bulbs generated by PSJA array can affect the shock wave. The separation shock wave bifurcates when interacting with the shock induced by the actuator. The foot portion of the separation shock wave disappeared when the controlling gas bulbs passed through the interaction region. What's more, as the actuators were located in streamwise direction, the controlling gas bulbs were completely emerged as a much larger gas bulb. As a result, the effective control time was longer than the single actuator and the control effect is also much better.