Transition to the obstructed discharge and a sharp change in the voltage-current characteristic as a result of gas heating in a short (positive-column-free) high-pressure glow discharge

Bogdanov, E. A.; Kudryavtsev, A. A.; Chirtsov, A. S.

doi:10.1134/s1063784211010051

Cited by 14 publications

(3 citation statements)

References 5 publications

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“…Therefore, the breakdown can be triggered at an earlier moment, indicating a lower ϕ b with the rise of the air content in stage II. From equation (10), it also explains why V gb decreases as the air content increases in stage II, as shown in Fig. 6.…”

Section: ) Stage I: 50 Ppm-500 Ppmmentioning

confidence: 83%

“…where ϕ b represents the phase corresponding to the moment of the first breakdown and ε r is the permittivity of the dielectric layer. From equation (10), we know that the increase of V gb implies the time delay of initial ignition. Thus, as the air content increases from 50 ppm to 500 ppm, the first breakdown is gradually delayed in stage I.…”

Section: ) Stage I: 50 Ppm-500 Ppmmentioning

confidence: 99%

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Influence of Oxygen on the Multiple-Current-Pulse Behavior in an Atmospheric Homogeneous Helium Dielectric Barrier Discharge With Air Impurities

Luo¹,

Huang²,

Wang³

et al. 2020

IEEE Access

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In this paper, through a one-dimensional fluid model, we investigate the influence of oxygen on the multiple-current-pulse (MCP) behavior in an atmospheric homogeneous dielectric barrier discharge (HDBD) in helium with air impurities. From the simulation results, we find that the O 2 Penning ionization plays a leading role in the discharge characteristics. As the air content increases from 0 ppm to 5000 ppm, the current waveforms show a transition from a single-pulse mode to MCP mode, and the number of current pulses (N p) also increases. Through analysis, we find that although N p increases monotonically, the evolution mechanism of the MCP discharges under different ranges of air content is different. At lower air concentration (less than 500 ppm here), we find the similar explanation as that reported in our previous work on the MCP behavior only considering N 2 impurity. However, when the air content is higher, we find that the seed electron density (n e0) remains basically unchanged, not like the sharp drop at lower air concentration. Further analysis reveals that the rapid growth of direct ionization during a small period before the breakdown helps generate MCP discharges. In addition, the attachment reaction of O 2 is analyzed. Results show that at higher air content (above 5000 ppm here), the O 2 attachment reaction will provide more possibilities of successive ignitions after the first pulse with the assistance of the applied voltage, implying a stimulative effect of the oxygen on MCP discharges. INDEX TERMS Dielectric barrier discharge, fluid model, helium/air, multiple-current-pulse behavior.

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Section: ) Stage I: 50 Ppm-500 Ppmmentioning

confidence: 83%

Section: ) Stage I: 50 Ppm-500 Ppmmentioning

confidence: 99%

Influence of Oxygen on the Multiple-Current-Pulse Behavior in an Atmospheric Homogeneous Helium Dielectric Barrier Discharge With Air Impurities

Luo¹,

Huang²,

Wang³

et al. 2020

IEEE Access

View full text Add to dashboard Cite

show abstract

“…This regime is unstable [32]. But at the same time, modeling based on the fluid approximation of plasma (as well as the analytical model of Engel and Steenbeck [61]) in one-dimensional and two-dimensional approximation gives an incident branch on the CVC in the region of low currents. It should be noted that in experiments both at low and high pressures, as well as in the framework of numerical calculations for discharges at low and medium pressures, oscillating modes of transition from the Townsend mode to the normal glow mode were reproduced [17,[63][64][65][66][67][68][69].…”

Section: Verification Model For Normal Glow Dischargementioning

confidence: 99%

Numerical study of various scenarios for the formation of atmospheric pressure DC discharge characteristics in argon: from glow to arc discharge

Saifutdinov¹

2022

Plasma Sources Sci. Technol.

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In this work, on the basis of a unified model from the point of view of describing the gas discharge gap and electrodes for 2D geometry, numerical calculations were carried out to study various modes of direct current (DC) discharges in argon at atmospheric pressure. The influence of the cooling conditions of the electrodes on the current-voltage characteristic of the discharge is shown: the transition from normal glow to arc discharge with the formation of an abnormal glow mode and without it. It is shown that, depending on the cooling conditions of the electrodes, two forms of arc discharge can be obtained: with a diffuse or contracted current spot. In the low-current mode, current and voltage oscillations were obtained during the transition from the Townsend to the normal glow discharge.

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

Yuan

Kudryavtsev

et al. 2021

Journal of Applied Physics

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This work deals with the numerical and experimental investigation of atmospheric pressure dielectric barrier discharges (DBDs). In the experiment, the current and voltage of DBD sustained in an argon flow in coaxial discharge cell are measured. Numerical models are based on the drift-diffusion theory of gas discharges. Different modelling approaches, where the electron kinetics is determined on the basis of the Maxwellian electron energy distribution function (EEDF), vs models with more realistic EEDF obtained from the solution of the electron Boltzmann equation are implemented. The effect of energy loss due to heating of the gas is considered.

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Transition to the obstructed discharge and a sharp change in the voltage-current characteristic as a result of gas heating in a short (positive-column-free) high-pressure glow discharge

Cited by 14 publications

References 5 publications

Influence of Oxygen on the Multiple-Current-Pulse Behavior in an Atmospheric Homogeneous Helium Dielectric Barrier Discharge With Air Impurities

Influence of Oxygen on the Multiple-Current-Pulse Behavior in an Atmospheric Homogeneous Helium Dielectric Barrier Discharge With Air Impurities

Numerical study of various scenarios for the formation of atmospheric pressure DC discharge characteristics in argon: from glow to arc discharge

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

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