scholarly journals Comparison of dielectric barrier discharge in air, nitrogen and argon at atmospheric pressure

1970 ◽  
Vol 6 (2) ◽  
pp. 6-12
Author(s):  
RB Tyata ◽  
DP Subedi ◽  
CS Wong
Keyword(s):  
Glow Discharge ◽  
Dielectric Barrier Discharge ◽  
Applied Voltage ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Electrode Spacing ◽  
Half Cycle ◽  
Dielectric Barrier ◽  
Plane Electrode ◽  
Filamentary Discharge

This paper reports the results of electrical characterization of dielectric barrier discharge (DBD) generated in air, nitrogen and argon at atmospheric pressure. Polycarbonate plate of thickness 1 mm was used as a dielectric barrier in a specially designed hemispherical-plane electrode system. A nonuniform filamentary type of discharge was observed in air. Introducing nitrogen and argon gas at controlled flow rate of 1-2 liters / minute resulted a more homogeneous discharge at a frequency of 28 kHz of the AC source. The discharge was investigated for two values of electrode gap of 1 mm and 2 mm by varying the applied voltage. The number of current pulse per half cycle and the magnitude of the discharge current were found to be higher in the case of air discharge in comparison to the discharge in nitrogen and argon. The characteristics of the discharge in air in the absence dielectric barrier was also examined and interestingly it was found that in this case the filamentary discharge turned to a glow discharge for specific value of applied voltage and electrode spacing. Keywords: DBD; Glow Discharge; hemispherical-plane electrode; filamentary discharge; Polycarbonate Sheet DOI: 10.3126/kuset.v6i2.4006Kathmandu University Journal of Science, Engineering and Technology Vol.6. No II, November, 2010, pp.6-12

scholarly journals Study of Dielectric Barrier Discharge in Air and Estimation of Electron Density and Energy Deposition

2019 ◽  
Vol 7 ◽  
pp. 1-9 ◽  
Author(s):  
Bhesh Bahadur Thapa ◽  
Raju Bhai Tyata
Keyword(s):  
Dielectric Barrier Discharge ◽  
Electron Density ◽  
Applied Voltage ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Plasma Reactor ◽  
Atmospheric Pressure Plasma ◽  
Half Cycle ◽  
Voltage Versus ◽  
Dielectric Barrier

This paper reports the electrical behaviors of atmospheric pressure plasma reactor with Dielectric Barrier Discharge (DBD) in air medium. The DBD discharge was generated in air at atmospheric pressure using Disc Electrode Geometry (DEG) reactor powered by ac voltage (0-7kV) at a frequency of 24kHz. The glass plates of thickness 1.0mm and 3.0mm were used as dielectric. The current-voltage characteristics were studied for two air gap of 2.0mm and 3.0mm by varying the applied voltages. The numbers of filamentary micro discharges were found as increased in each half cycle with increase in power. The observations of Lissajous figure of applied voltage versus electric current was used for measuring energy deposited by discharge and also compared with calculated value. Lissajous figures clearly show that the energy deposited by discharge was dependent on applied voltage. The electron density of discharge was measured by power balance method. Electron density was found in the order of 1017 per cubic meter.

scholarly journals Modal analysis of dielectric barrier discharge-based argon cold plasma jet

2020 ◽  
Vol 38 (4) ◽  
pp. 229-238
Author(s):  
G. Divya Deepak ◽  
N. K. Joshi ◽  
Ram Prakash
Keyword(s):  
Glow Discharge ◽  
Dielectric Barrier Discharge ◽  
Atmospheric Pressure ◽  
Cold Plasma ◽  
Barrier Discharge ◽  
Plasma Jet ◽  
Ring Electrode ◽  
Comsol Multiphysics ◽  
Dielectric Barrier ◽  
Argon Gas

AbstractIn this study, an atmospheric pressure dielectric barrier discharge-based argon plasma jet has been modeled using COMSOL Multiphysics, which is based on the finite element method. The fluid dynamics and plasma modules of COMSOL Multiphysics code have been used for the modeling of the plasma jet. The plasma parameters, such as electron density, electron temperature, and electrical potential, have been examined by varying the electrical parameters, that is, supply voltage and supply frequency for both cases of static and with the flow of argon gas. The argon gas flow rate was fixed at 1 l/min. Ring electrode arrangement is subjected to a range of supply frequencies (10–25 kHz) and supply voltages (3.5–6 kV). The experimental results of the ring electrode configuration have been compared with the simulation analysis results. These results help in establishing an optimized operating range of the dielectric barrier discharge-based cold plasma jet in the glow discharge regime without arcing phenomenon. For the applied voltage and supply frequency parameters examined in this work, the discharge was found to be consistently homogeneous and displayed the characteristics of atmospheric pressure glow discharge.

scholarly journals Atmospheric pressure glow discharge in air

2012 ◽  
Vol 1 ◽  
pp. 25-32
Author(s):  
R.B. Tyata ◽  
D.P. Subedi ◽  
C.S. Wong
Keyword(s):  
Glow Discharge ◽  
Power Supply ◽  
Applied Voltage ◽  
Atmospheric Pressure ◽  
Electrical Characterization ◽  
Single Pulse ◽  
Electrode Spacing ◽  
Half Cycle ◽  
Atmospheric Pressure Glow Discharge ◽  
Pressure Glow Discharge

In this study, an atmospheric pressure glow discharge (APGD) in air using 50Hz power supply was experimentally investigated by means of electrical characterization. The discharge has been generated in a specially designed hemispherical–plane electrode system. The main objective of the study was to identify the conditions to generate AC glow at atmospheric pressure air using 50 Hz power supply. The mode of discharge was characterized by observing the number of current pulses per half cycle in the current waveform of the discharge for different values of applied voltage for different electrode spacing. It was found that with 3mm gap and 18.75 kV of applied voltage, the current waveforms consist of a single pulse per half cycle indicating the formation of AC glow discharge. An attempt to study the effect of dielectric on the mode of the discharge was also made by using three types of materials namely Polycarbonate, Polyethylene and Glass as barrier between the electrodes.

scholarly journals Atmospheric pressure streamer and glow-discharge generated alternately by pin-to-plane dielectric barrier discharge in air

2012 ◽  
Vol 61 (19) ◽  
pp. 195202
Author(s):  
Yu Zhe ◽  
Zhang Zhi-Tao ◽  
Yu Qing-Xuan ◽  
Xu Shao-Jie ◽  
Yao Jing ◽  
...  
Keyword(s):  
Glow Discharge ◽  
Dielectric Barrier Discharge ◽  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Dielectric Barrier
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