Simulation of negative corona discharge in atmospheric air: from mode of Trichel pulses to stationary discharge

Kokovin, Aleksandr; Kozyrev, A. V.; Kozhevnikov, V. Yu.

doi:10.1088/1742-6596/2064/1/012024

Cited by 9 publications

(7 citation statements)

References 17 publications

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“…A plasma-chemical set includes the most important reactions: production of single charged ions, ions recharging and important conversion reactions, as well as various electron energy losses. The full plasma-chemical reaction set in air can be found in [1].…”

Section: Theoretical Modelmentioning

confidence: 99%

“…However, there is a range of applied voltage value, at which the corona discharge has an unstable mode. Our previous work [1] has shown that the negative corona discharge in atmospheric-pressure air has three evolution stages: unstable mode (mode of Trichel pulses), stationary glow and unstable-tostationary transition. Characteristics of stationary mode are of interest for practical application.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characteristics of stationary negative corona discharge in atmospheric air

Kokovin¹,

Kozyrev²,

Kozhevnikov³

et al. 2022

8th International Congress on Energy Fluxes and Radiation Effects

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The paper presents a 2D-axisymmetric multi-fluid model of a stationary negative corona discharge in atmospheric-pressure air in the needle-to-plane diode. Discharges with a cathode tip with a curvature radius of 20–200 μm, a gap length of 3–10 mm, and a power source voltage of 5–35 kV were studied. The spatial distribution of the discharge plasma at a current level of 2.2 mA with a gap voltage of 5.8 kV, gap length of 10 mm, tip radius of 100 μm is described in detail. This corona discharge has a glow discharge structure with a subnormal current density of 5 A/cm2.

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Section: Theoretical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Characteristics of stationary negative corona discharge in atmospheric air

Kokovin¹,

Kozyrev²,

Kozhevnikov³

et al. 2022

8th International Congress on Energy Fluxes and Radiation Effects

View full text Add to dashboard Cite

show abstract

“…The electron mobility and diffusion coefficients were obtained using LFA, and the reaction rates were calculated based on LEA. Kokovin et al [44] studied two modes of discharge and their transition from Trichel pulses to stationary glow discharge in air. Their model featured 9 species and 23 reactions, where the reaction rates and transport coefficients obtained using LEA method.…”

Section: Introductionmentioning

confidence: 99%

Numerical approaches in simulating Trichel pulse characteristics in point-plane configuration

Shaygani

Adamiak

2023

J. Phys. D: Appl. Phys.

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In this work, a detailed comparison is made of a few different approaches to numerical modeling of non-equilibrium gas discharge plasmas in dry ambient air at atmospheric conditions, leading to Trichel pulse discharge. Simulation models are based on a two-dimensional axisymmetric finite element discretization of point-plane geometry. The negative corona discharge and the hydrodynamic approximation for generic ionic species (electrons, positive and negative ions) are used. The models account for the drift, diffusion, and reactions of the species. They comprise continuity equations coupled to Poisson’s equation for the electric field. Three different formulations were used to specify the ionic reaction rate coefficients. In the first one, the reaction coefficients are approximated by the analytical expressions as a function of the electric field intensity. Two others extract the reaction coefficients from the solution of the Boltzmann equation as a function of the reduced electric field or the electron energy. The effect of gas flow and heating on the pulse characteristics is also investigated. The accuracy of the models has been validated by comparing them with the experimental data.

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“…On the one hand, gas heating increases the field strength at the high-voltage electrode, and on the other hand makes the charged material reach a stable distribution faster, which promotes the pulsed-pulseless discharge modes transition. Kokovin et al [14] compare and analyze the plasma composition density and electric field intensity before and after the transition of corona discharge from pulsed mode to glow mode. The article also emphasizes that the plasma background generated by the pulsed current is an important reason for the mode transition.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear evolution of space synthetic electric field in positive DC corona mode transition

Nie

Fan

Xiang

et al. 2023

J. Phys. D: Appl. Phys.

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Positive corona discharge in the air exists under several distinctive forms depending on DC voltage amplitude, including pulses or pulseless glow. Previous studies obtained the current and optical image characteristics of corona discharge through experiments. However, the synthesized electric field characteristics of the different corona modes have not been deeply studied by experiments, and lack of sufficient understanding of the effect of space charges. In this paper, electro-optical modulation technology is used to investigate the characteristics of the space synthetic electric field(SSE) for positive DC corona modes transition. The experimental results show the significant nonlinear evolution characteristics of the SSE and discharge modes transition with the increase of applied voltage. In the pulsed mode, the SSE first changes slowly and then increases sharply. As the applied voltage increases, the discharge mode transition from pulse mode to pulseless glow mode, while the SSE changes slowly. The electric field change rate in the sharp increase is 2 to 3 times that in the slow change. Dynamic accumulation behavior of space charges is the main reason for the nonlinear evolution of the SSE. When the pulse current starts, the discharge amplitude and frequency are low, and the ions are far away from the ionization region, which has little effect on the migration process of the high field strength region and subsequent ions. With the increase of the applied voltage, the continuous accumulation of positive ions enhances the migration of subsequent positive ions, thereby rapidly increasing the SSE. During the glow discharge mode, the generation and dissipation of space charges are close to dynamic equilibrium, and the fusion of multiple positive ion clouds will increase the SSE.

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Simulation of negative corona discharge in atmospheric air: from mode of Trichel pulses to stationary discharge

Cited by 9 publications

References 17 publications

Characteristics of stationary negative corona discharge in atmospheric air

Characteristics of stationary negative corona discharge in atmospheric air

Numerical approaches in simulating Trichel pulse characteristics in point-plane configuration

Nonlinear evolution of space synthetic electric field in positive DC corona mode transition

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