Characteristics of the stabilized glow discharge in air

Waters, R. T.; Stark, W.

doi:10.1088/0022-3727/8/4/014

Cited by 82 publications

(52 citation statements)

References 6 publications

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“…The values of the parameters used in this model are given in the appendix. The validation of the model has been performed by comparison with the previous 1D simulation results by Morrow [24] and experimental data by Waters [1] presented in [29].…”

Section: Numerical Model and Methodsmentioning

confidence: 99%

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On the transition from stable positive glow corona to streamers

Liu¹,

Becerra²

2016

J. Phys. D: Appl. Phys.

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A two-dimensional numerical simulation of the transition from stable positive glow corona to streamers in coaxial cylindrical configuration is presented. The hydrodynamic model with several convection-dominated continuity equations together with Poisson equation are solved with consideration of the ionization layer. The transition from a stable positive glow corona produced under a DC voltage to streamers is investigated under a sudden change of the applied voltage. The critical rate of rise of voltage required for the transition from positive glow to streamer corona is evaluated with a voltage ramp. By introducing either physical or numerical instabilities into the model, streamers with filamentary structures are observed, which produce a sudden increase of the discharge current by more than two orders of magnitude. It is also found that the surface electric field of the corona-generating conductor deviates from the onset electric field, casting doubts about the validity of Kaptzov's approximation to evaluate the transition from stable glow to streamers.

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Section: Numerical Model and Methodsmentioning

confidence: 99%

“…Corona discharges in air at atmospheric pressure occur in two different modes: homogeneous glow discharges (glow corona) and filamentary streamer discharges (streamer corona) [1]. On one hand, corona discharges are undesirable in electrical power components (transmission lines, transformers, generators, etc.)…”

Section: Introductionmentioning

confidence: 99%

On the transition from stable positive glow corona to streamers

Liu¹,

Becerra²

2016

J. Phys. D: Appl. Phys.

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“…As the background electric field intensifies, point corona discharges are initiated from the tips of sharp objects on the ground. It is known from laboratory experiments that corona discharges from sharp objects occur in two different forms: as a thin luminous glow layer and as bright, filamentary streamer channels [2]. The former, known as a glow corona, appears as a thin bright plasma, with a continuous current.…”

Section: Aq1mentioning

confidence: 99%

“…The latter, called a streamer corona, is characterized by sequences of filamentary ionized channels, which produce a pulsating current. While glow coronas are generally formed when slowly changing electric fields are applied to a sharp electrode, streamers are usually associated with rapidly changing electric fields [2].…”

Section: Aq1mentioning

confidence: 99%

“…If the total background electric field produced by these two fields is sufficiently strong, streamer corona discharges may emanate from the tips of tall, nearby objects. In some cases, in a sufficiently non-uniform electric field, streamers may be launched from the already existing glow corona [2]. Once an initial burst of streamers is formed, new streamers can be subsequently produced when the electric field conditions are restored as the downward leader continues approaching the ground.…”

Section: Aq1mentioning

confidence: 99%

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Glow corona generation and streamer inception at the tip of grounded objects during thunderstorms: revisited

Becerra¹

2013

J. Phys. D: Appl. Phys.

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The initiation of streamers prior to a lightning strike can be reportedly inhibited by glow corona discharges generated from tall objects. In contrast to previous studies based on a simplified one-dimensional model of glow corona, a two-dimensional evaluation of the corona ion drift from tall objects is used here to analyse this effect quantitatively. Proper estimates for the corona space charge distribution generated during both the charging process of a thundercloud and the descent of the downward stepped leader are thus calculated. It is found that the shielding effect of the corona space charge on the streamer inception is not as severe as previously reported. Estimations of the effective height of the downward leader tip at which streamer inception takes place are presented and discussed for lightning rods and dissipation array systems.

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Corona discharges from a windmill and its lightning protection tower in winter thunderstorms

Wang

Rison

et al. 2017

JGR Atmospheres

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This paper presents lightning mapping array (LMA) observations of corona discharges from a windmill and its lightning protection tower in winter thunderstorms in Japan. Corona discharges from the windmill, called windmill coronas, and those from the tower, called tower coronas, are distinctly different. Windmill coronas occur with periodic bursts, generally radiate larger power, and possibly develop to higher altitudes than tower coronas do. A strong negative electric field is necessary for the frequent production of tower coronas but is not apparently related with windmill coronas. These differences are due to the periodic rotation of the windmill and the moving blades which can escape space charges produced by corona discharges and sustain a large local electric field. The production period of windmill coronas is related with the rotation period of the windmill. Surprisingly, for one rotation of the windmill, only two out of the three blades produce detectable discharges and source powers of discharges from these two blades are different. The reason for this phenomenon is still unclear. For tower coronas, the source rate can get very high only when there is a strong negative electric field, and the source power can get very high only when the source rate is very low. The relationship between corona discharges and lightning flashes is investigated. There is no direct evidence that corona discharges can increase the chance of upward leader initiation, but nearby lightning flashes can increase the source rate of corona discharges right after the flashes. The peak of the source height distribution of corona discharges is about 100 m higher than the top of the windmill and the top of the tower. Possible reasons for this result are discussed.

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Characteristics of the stabilized glow discharge in air

Cited by 82 publications

References 6 publications

On the transition from stable positive glow corona to streamers

On the transition from stable positive glow corona to streamers

Glow corona generation and streamer inception at the tip of grounded objects during thunderstorms: revisited

Corona discharges from a windmill and its lightning protection tower in winter thunderstorms

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