Non-LTE modeling of high pressure sodium discharges

Holló, S.

doi:10.1109/plasma.1996.550628

Cited by 1 publication

(2 citation statements)

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“…As examples of theoretical modeling of nonequilibrium effects in high-pressure arc discharges, studies [1]- [6] may be indicated. In [1] and [3]- [5], a detailed two-dimensional study was performed of a deviation of the electron temperature from Manuscript received December 16, 1998; revised May 14, 1999.…”

Section: Introductionmentioning

confidence: 99%

“…the heavy-particle temperature [1], [3] or of a deviation from the ionization equilibrium [4], [5]. In [2] and [6] numerical calculations with account of deviations of both types are presented for fixed current values. In this work, results of numerical modeling of nonequilibrium effects are presented for a high pressure argon arc in a wide current range, with the aim to find out at which currents a transition from LTE to nonLTE conditions occurs and a deviation of what kind, the deviation of the electron temperature from the heavy-particle temperature or the deviation from the ionization equilibrium, is the first to appear.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of a nonequilibrium cylindrical column of a low-current arc discharge

Benilov

1999

IEEE Trans. Plasma Sci.

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Numerical modeling of a wall-stabilized low-current arc discharge in the high pressure argon plasma is performed with account both of a deviation of the electron temperature from the heavy-particle temperature and of a deviation from the ionization equilibrium. Results are presented for a current range from currents of the order of 100 A down to several A, in which a regime of the discharge varies from the one typical for an arc discharge (local thermodynamic equilibrium (LTE) in the hot core, energy supplied to electrons by the electric field is mainly removed by the electron heat conduction) to the one typical for a glow discharge. (The electron temperature is substantially higher than the heavy-particle temperature and does not change much across the column, the ionization exceeds or substantially exceeds the recombination in every point of the column, energy supplied to electrons by the electric field is mainly locally transferred to heavy particles). On the axis of the discharge, the deviations from LTE become appreciable when the current decreases to several tens A. The deviation from the ionization equilibrium comes into play at higher currents than the deviation from the thermal equilibrium. Comparison with available experimental data is given.

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