Computational study of glow corona discharge in wind: Biased conductor

Nguyen, Ngoc Cuong; Guerra-Garcia, Carmen; Peraire, J.; Martı́nez-Sánchez, Manuel

doi:10.1016/j.elstat.2017.06.005

Cited by 14 publications

(16 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The solution method of the partial differential equations with the given boundary conditions requires a nested iterative solution scheme: (i) Starting with an initial guess of the wing potential, the wire charge density distribution is calculated from the Peek integral electron multiplication condition, Equation 6, by using an iterative method described by Nguyen et al (2017); (ii) having calculated the wire charge density distribution, the wing potential is determined by imposing the condition that all ions that are emitted are captured by the wing. Steps (i) and (ii) are repeated until both the Peek integral electron multiplication condition and the charge capture condition are satisfied simultaneously.…”

Section: Methodsmentioning

confidence: 99%

“…As discussed in detail by Nguyen et al. (2017), the combination of wind and field effects causes the active ionization zone (or coronating surface) to occupy only a fraction of the wire perimeter. Outside this sector, no ionization occurs and the charge density is set to zero.…”

Section: Electrically Isolated Electrode Configurationmentioning

confidence: 98%

“…The boundary conditions for the charge density are zero charge in a distant virtual cathode surrounding the wing-wire electrode system and a charge emission condition on the wire, which is a modification to the widely used Kaptzov (1947) condition to account for the influence of the space charge, as described in section 2.2.2. As discussed in detail by Nguyen et al (2017), the combination of wind and field effects causes the active ionization zone (or coronating surface) to occupy only a fraction of the wire perimeter. Outside this sector, no ionization occurs and the charge density is set to zero.…”

Section: 1029/2020jd032908mentioning

confidence: 99%

“…Since the wind removes the shielding ions from the coronating tip vicinity, the current was shown to be proportional to the ion speed, which reduces to a linear relationship with wind in the case of dominant wind as compared to the electrical drift. In the context of atmospheric electricity research, and motivated by understanding the behavior of high‐voltage d.c. transmission lines and grounded lightning rods in thunderstorm fields, many efforts have followed, including simulations (Bazelyan et al., 2009; Becerra, 2013; Maruvada, 2014; Mokrov et al., 2013; Nguyen et al., 2017) and field campaigns (D'Alessandro, 2009). All of these efforts contemplate earthed structures exposed to high atmospheric fields and demonstrate that, in the high‐speed wind regime, the current indeed increases linearly with the wind.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Corona Discharge in Wind for Electrically Isolated Electrodes

et al. 2020

Self Cite

View full text Add to dashboard Cite

For various problems in atmospheric electricity it is necessary to understand the behavior of corona discharge in wind. Prior work considers grounded electrode systems, of relevance for earthed towers, trees, or windmills subjected to thunderstorms fields. In this configuration, the effect of wind is to remove the shielding ions from the coronating electrode vicinity strengthening the corona and increasing its current. There are a number of cases, such as isolated wind turbine blades or airborne vehicles, that are not completely represented by the available models and experiments. This paper focuses on electrode systems that are electrically isolated from their environment and reports on a wind tunnel campaign and accompanying theoretical work. In this configuration, there are two competing effects: the removal of the shielding ions by the wind, strengthening the corona; and the electrode system charging negatively (for positive corona) with respect to its environment, weakening the corona. This leads to three different operating regimes; namely, for positions that favor ion recapture, charging is limited and current increases with wind as in the classical scaling; for positions that favor ion transport by the wind, the system charges negatively and the current decreases with wind; for the later configuration, as wind increases, the current can vanish and the system potential saturates. The results from this work demonstrate that classical scaling laws of corona discharge in wind do not necessarily apply for isolated electrodes and illustrate the feasibility of using a glow corona in wind for controlled charging of a floating body.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Electrically Isolated Electrode Configurationmentioning

confidence: 98%

Section: 1029/2020jd032908mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Corona Discharge in Wind for Electrically Isolated Electrodes

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…and so the value for a = 0.1mm, as used in all the experiments reported in this paper, is used. Details of the numerical solution method are reported in [14]. The charging and corona current per unit length predicted by the model, for the geometry of the experiment reported in section III.C and shown in the insert of the graph, is plotted in Figure 2.…”

Section: Theory Of Charging By Corona Discharge a Formulationmentioning

confidence: 99%

Controlled Electric Charging of an Aircraft in Flight using Corona Discharge

Guerra-Garcia

Fontanes

Urbani

et al. 2020

AIAA Scitech 2020 Forum

View full text Add to dashboard Cite

This work is part of an ongoing study to provide an artificial means of controlling the net electrical charge of an aircraft in flight through charge emission. The charging system consists on an onboard d.c. high voltage power supply (of the order of 10 kV) with the high voltage terminal connected to a coronating anode and the low voltage terminal connected to the body whose potential needs to be controlled. The system must be electrically floating and exposed to wind. During an initial transient, the positive ions produced by the corona are convected away by the wind and the body charges negatively in response. This paper presents a theoretical model of the charging strategy that reveals two distinct regimes of charging and corona operation, as well as wind tunnel experiments using both a sphere-corona tip assembly and a 2D wing-corona wire assembly that confirm the theoretical predictions. Finally, we implement the system in an RC aircraft to demonstrate that charging in flight using corona discharge is feasible and does not affect flight operations.

show abstract