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In this work we experimentally examine the characteristics of a dielectric barrier discharge reactor driven by two distinct pulsed high voltage (HV) generators. Firstly, the operation under a HV generator delivering positive high voltage pulses with short (tenths of ns) rise and fall times in a low (up to 100 Hz) repetition frequency is illustrated. Then the DBD obtain with the use of a bipolar generator...
This work presents a primary experimental study of a custom-made coaxial DBD reactor driven by a bipolar pulsed High Voltage supply. The reactor is fed by nitrogen or air at atmospheric pressure conditions and uses a dielectric coating on the HV electrode. The High Voltage generator delivers a ??pulse-like?? bipolar signal in the 10-50 kHz frequency range. This set-up has been conceived for surface...
This work presents a primary experimental study of a custom-made coaxial DBD reactor driven by a positive pulsed high voltage supply. The reactor is fed by N2 or Air at atmospheric pressure and uses ceramic coatings as barriers. The high voltage generator delivers square pulses of variable rise/fall time, frequency, amplitude and pulse duration. Current oscillogrammes reveal the occurrence of two...
The formation and propagation of ionization waves (streamers) in the filamentary mode of a barrier discharge in Nitrogen at atmospheric pressure is examined. The role of photoemission as well as of photoionization is analysed via a two dimensional finite element flux corrected transport (FEM-FCT) model. Numerical investigations show how the photoemission coefficient influences the formation and propagation...
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