Modelling of an Atmospheric Pressure Nitrogen Glow Discharge Operating in High-Gas Temperature Regimes

Prevosto, Leandro; Kelly, H.; Mancinelli, B.

doi:10.1007/s11090-016-9716-3

Cited by 20 publications

(29 citation statements)

References 56 publications

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“…These results agreed with the inferences made in [10]. The density of N 2 (A 3 u + ) molecules was moderately high (5 × 10 17 -8 × 10 18 m −3 ) under the conditions considered (although it was at least one order of magnitude lower than that found in atmospheric-pressure nitrogen discharges [47], because N 2 (A 3 u + ) molecules were efficiently quenched by oxygen), favored by the vibrational nonequilibrium state of the discharge. Note that the rate of population of the N 2 (A 3 u + ) (and other states) by electron impact became significantly higher, as the degree of vibrational excitation of N 2 (X 1 g…”

Section: Resultssupporting

confidence: 89%

Modelling of an Atmospheric–Pressure Air Glow Discharge Operating in High–Gas Temperature Regimes: The Role of the Associative Ionization Reactions Involving Excited Atoms

Cejas

Mancinelli

Prevosto

2020

Plasma

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A model of a stationary glow-type discharge in atmospheric-pressure air operated in high-gas-temperature regimes (1000 K < Tg < 6000 K), with a focus on the role of associative ionization reactions involving N(2D,2P)-excited atoms, is developed. Thermal dissociation of vibrationally excited nitrogen molecules, as well as electronic excitation from all the vibrational levels of the nitrogen molecules, is also accounted for. The calculations show that the near-threshold associative ionization reaction, N(2D) + O(3P) → NO+ + e, is the major ionization mechanism in air at 2500 K < Tg < 4500 K while the ionization of NO molecules by electron impact is the dominant mechanism at lower gas temperatures and the high-threshold associative ionization reaction involving ground-state atoms dominates at higher temperatures. The exoergic associative ionization reaction, N(2P) + O(3P) → NO+ + e, also speeds up the ionization at the highest temperature values. The vibrational excitation of the gas significantly accelerates the production of N2(A3∑u+) molecules, which in turn increases the densities of excited N(2D,2P) atoms. Because the electron energy required for the excitation of the N2(A3∑u+) state from N2(X1∑g+, v) molecules (e.g., 6.2 eV for v = 0) is considerably lower than the ionization energy (9.27 eV) of the NO molecules, the reduced electric field begins to noticeably fall at Tg > 2500 K. The calculated plasma parameters agree with the available experimental data.

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Section: Resultssupporting

confidence: 89%

Modelling of an Atmospheric–Pressure Air Glow Discharge Operating in High–Gas Temperature Regimes: The Role of the Associative Ionization Reactions Involving Excited Atoms

Cejas

Mancinelli

Prevosto

2020

Plasma

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“…Source terms Q VT . The vibrational-translational (V-T) energy relaxation transfer rate Q VT was expressed by the Landau-Teller formula 14,24) as,…”

Section: Cfd Calculation For Reproducing Msdmentioning

confidence: 99%

Non-equilibrium aerodynamics between ionization-wave and shock-wave fronts in millimetre-wave supported detonation

Tabata,

Oda,

Komurasaki

et al. 2023

Jpn. J. Appl. Phys.

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A shock wave driven by discharge plasma propagating in a high-power millimetre-wave beam was investigated both experimentally and numerically. A shadowgraph experiment was used to visualize the shock wave and plasma. The ionization wave front of the plasma preceded the shock wave by 2.0–4.0 mm under conditions of 170 GHz beam frequency, atmospheric pressure, and 1.1 GW/m2 peak power density (power density at the beam axis). Furthermore, a two-dimensional Computational Fluid Dynamics (CFD) simulation considering non-equilibrium temperatures and filamentary plasma structures revealed that an ionization-wave front precedes a shock wave front because the energy relaxation requires a few micro-seconds from vibrational excitation at a plasma front to translational excitation for the shock wave formation. Consequently, the distance between an ionization wave front and shock wave front is 3.8 mm in the two-dimensional CFD simulation, which agreed with the experimental results.

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“…To describe the kinetics of the particles in the type of discharge object of our study, we used the fluid model which consists in replacing the Boltzmann equation by these moments using the drift diffusion approximation [10], these equations are described below [11].…”

Section: Numerical Modelmentioning

confidence: 99%

“…Several dielectric materials used in dielectric barrier discharges (DBD) as ceramics (Alumin 96% used in this model), glass, silicon and polymer. These materials have the relative permittivity under 10 ( < 10) which give an ability to take the thickness of each dielectric coating in order of mm [10]. Figure 7 shows the discharge current variation (Figure 7…”

Section: Dielectric Coating Effectmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and parametric study of dielectric barrier discharge in pure nitrogen at atmospheric pressure

Lahouel¹,

Benyoucef²,

Tebani³

2021

Turk J Phys

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This paper presents the one-dimensional simulation of the Dielectric Barrier Discharge (DBD) in pure Nitrogen at atmospheric pressure using a sinusoidal supply, within a reactor which consists of two parallel plate. For this purpose, significant reactions among the reactive species in the discharge are taken into account in this work by considering more than 70 reactions for 13 species. The model used in this study to describe the kinetics of the plasma species is the second order fluid model which consists in replacing the Boltzmann equation by these first three moments by using the drift-diffusion approximation for flux. In order to validate the model developed in this research, a comparison of the simulated discharge currents obtained with available experimental data is carried out, before presenting the evolution of the properties of the plasma species. After that, a parametric study is performed showing the effect of some parameters like applied voltage, frequency and nature of the coating dielectric material on the characteristics of DBD in nitrogen. Simulation results for a double dielectric DBD reactor are also presented at the end of this paper.

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Modelling of an Atmospheric Pressure Nitrogen Glow Discharge Operating in High-Gas Temperature Regimes

Cited by 20 publications

References 56 publications

Modelling of an Atmospheric–Pressure Air Glow Discharge Operating in High–Gas Temperature Regimes: The Role of the Associative Ionization Reactions Involving Excited Atoms

Modelling of an Atmospheric–Pressure Air Glow Discharge Operating in High–Gas Temperature Regimes: The Role of the Associative Ionization Reactions Involving Excited Atoms

Non-equilibrium aerodynamics between ionization-wave and shock-wave fronts in millimetre-wave supported detonation

Modeling and parametric study of dielectric barrier discharge in pure nitrogen at atmospheric pressure

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