Numerical study on helium-oxygen dielectric barrier discharges: From single-breakdown to multi-breakdowns per half-cycle

2018 ◽  
Vol 25 (7) ◽  
pp. 073508 ◽  
Author(s):  
Hong Zhang ◽  
Yang Guo ◽  
Dingxin Liu ◽  
Bowen Sun ◽  
Yifan Liu ◽  
...  
Keyword(s):  
Numerical Study ◽  
Half Cycle ◽  
Dielectric Barrier Discharges ◽  
Dielectric Barrier ◽  
Barrier Discharges

Effects of oxygen concentration on helium-oxygen dielectric barrier discharges: From multi-breakdowns to single-breakdown per half-cycle

2018 ◽  
Vol 25 (10) ◽  
pp. 103511 ◽  
Author(s):  
Hong Zhang ◽  
Yang Guo ◽  
Dingxin Liu ◽  
Bowen Sun ◽  
Yifan Liu ◽  
...  
Keyword(s):  
Oxygen Concentration ◽  
Half Cycle ◽  
Dielectric Barrier Discharges ◽  
Dielectric Barrier ◽  
Barrier Discharges

scholarly journals Current Filaments in Asymmetric Surface Dielectric Barrier Discharge

2021 ◽  
Vol 11 (5) ◽  
pp. 2079
Author(s):  
Cecilia Piferi ◽  
Ruggero Barni ◽  
H. Eduardo Roman ◽  
Claudia Riccardi
Keyword(s):  
Electromagnetic Waves ◽  
Dielectric Surface ◽  
Half Cycle ◽  
Dielectric Barrier Discharges ◽  
Time Duration ◽  
Lower Electrode ◽  
Dielectric Barrier ◽  
Forward Stroke ◽  
Mean Charge ◽  
Mean Current

In this study, we examine the statistical properties of asymmetric surface dielectric barrier discharges (SDBD) produced by applying a periodic high voltage between two conducting displaced electrodes, located at the opposite sides of a flat dielectric panel. Here, the asymmetry refers to the fact that the lower electrode is fully covered with an insulating material, while the upper one, glued onto the dielectric surface, is otherwise left exposed to the air. Such a configuration allows the formation of a thin layer of plasma above the insulating surface. A single cycle signal consists of two well-separated half-cycle patterns, denoted as forward and backward strokes, corresponding to positive and negative voltages, respectively. They display a quite complex discharge pattern constituted by a sequence of individual peaks (bursts) of varying current and time duration. Specifically, we find that backward stroke bursts carry a positive mean charge Q≃0.3 nC and mean current I≃35 mA, with a mean duration τ≃15 ns, while forward stroke bursts have a negative mean charge Q≃−0.1 nC, a mean current I≃−20 mA, and a mean duration τ≃11 ns. The statistical analysis suggests that power injection can be tailored to produce the active agents in the plasma needed for a particular application. We also determined discharge spatial correlation patterns from measurements of the associated stimulated optical emission. The optical excitations occur as a result of the ionizing effect of the electromagnetic waves which ignite the discharge, followed by the electric current flow. In particular, we point out that one of the phases of the discharge is compatible with a cathode directed streamer phenomenon (backward stroke), while the mechanism acting for a forward stroke has a different structure.

Analysis of parameters of coaxial dielectric barrier discharges in argon flow at atmospheric pressure

2021 ◽  
Vol 129 (15) ◽  
pp. 153305
Author(s):  
Hui Li ◽  
Chengxun Yuan ◽  
Anatoly Kudryavtsev ◽  
Aleksandr Astafiev ◽  
Evgeny Bogdanov ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Dielectric Barrier Discharges ◽  
Dielectric Barrier ◽  
Argon Flow ◽  
Barrier Discharges

Degradation of glucocorticoids in water by a synergistic system of peroxymonosulfate, microbubble and dielectric barrier discharges

2021 ◽  
Vol 42 ◽  
pp. 102175
Author(s):  
Andere Clement Miruka ◽  
Ai Zhang ◽  
Qiancheng Wang ◽  
Dahai Zhu ◽  
Zheng Wang ◽  
...  
Keyword(s):  
Dielectric Barrier Discharges ◽  
Dielectric Barrier ◽  
Barrier Discharges
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