Closed-Loop Performance Control of DBD Plasma Actuators

Experimental method to quantify the efficiency of the first two operational stages of nanosecond dielectric barrier discharge plasma actuators

“…[J] The power drained from a DBD actuator is dependent on the load of the system itself [12,15,22] which is composed of two parts, one purely passive that depends on the actuator construction characteristics (geometry, material, etc.) and the other is discharge dependent, meaning it is a function of electrical characteristics.…”

“…The first attempt to provide a guideline for the evaluation of the efficiency of AC-DBD is reported by Roth and Dai [12], work later expanded by Kriegseis et al [13,14,15].…”

“…The efficiency of the third operational stage of an AC-DBD is a non-dimensional coefficient larger than 1 [15], since it is the ratio between the energy gained by applying flow control and the energy consumed to actuate the flow. Therefore, it is related to the flow control task to be achieved and its calculation is straightforward according to the literature [13,14,15]. For this reason, and because the estimation of the first two stages of efficiency is necessary in other cases (i.e.…”

“…According to Kriegseis et al [13,14,15] the efficiency of the first operational stage is defined as the ratio between the discharge power P A and the electrical input power P input ; it is a non-dimensional coefficient that ranges between 0 and 1 [15]. The second stage is defined as the ratio between the fluid mechanic (output) power P FM and the discharge power P A .…”