Figure 3
Voltage-current characteristics of the discharge.
(A) Typical waveforms of voltage (black solid line) and current in Type 2 jet. The operating condition of pulsed-dc plasma jet is the applied voltage 1.7 kVpp, repetition frequency 50 kHz and duty ratio 10%. The inset shows the total current (plasma on; pink solid line) and displacement current (plasma off; gray dashed line). To find out the actual discharge current, the displacement current is subtracted from the total current. (B) Total current as a function of additive oxygen flow rate for two types of oxygen injection.
