Figure 5
(a) Schematic view of the experimental setup. The DC source is connected to the DBD plasma actuator via a low-pass filter, while the pulse generator is connected via a high-pass filter to prevent interference between power supplies. (b) Conceptual diagram of the three-electrode DBD plasma actuator with a current limiting resistor. The resistor (1 MΩ) is added to the exposed electrode, which plays a role in surface-charge absorption, to avoid sparks. (c) Typical voltage and current waveforms measured by the probes as shown in (a). Similar current waveforms are obtained in the two- and three-electrode configurations, except for the peak value. (d) Typical current waveforms passing through the resistor, as presented in (b). The peak value increases with an increase in DC voltage, indicating that more positive ions are collected and absorbed by the third electrode.
