The effect of a corona discharge on a lightning attachment

Aleksandrov, N. L.; Bazelyan, É. M.; Raǐzer, Yu. P.

doi:10.1134/1.1856709

Cited by 42 publications

(54 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the striking distances with the critical radius concept (for critical radius of 0.36 m [4] and 0.28 m [13]), the Rizk generalized leader inception equation [5] and the field intensification criterion of Petrov and Waters [15,16] are computed at the downward leader tip height where each criterion is satisfied. The Bazelyan and Raizer's equation [17,35] and the Lalande's stabilization field equation [18] are not evaluated in this paper since they are based on the concept of a stabilization field in static conditions. Even though the striking distance for these two models could be estimated as the height of the downward leader tip that produces an average background field over the height of the rod equal to the stabilization field, this assumption is not valid for structures larger than about 50 m [19].…”

Section: Calculation Of the Effective Striking Distancementioning

confidence: 99%

Time dependent evaluation of the lightning upward connecting leader inception

Becerra

Cooray

2006

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The evaluation of the upward connecting leader inception from a grounded structure has generally been performed neglecting the effect of the propagation of the downward stepped leader. Nevertheless, field observations suggest that the space charge produced by streamer corona and aborted upward leaders during the approach of the downward lightning leader can influence significantly the initiation of stable upward positive leaders. Thus, a physical leader inception model is developed, which takes into account the electric field variations produced by the descending leader during the process of inception. Also, it accounts for the shielding effect produced by streamer corona and unstable leaders formed before the stable leader inception takes place. The model is validated by comparing its predictions with the results obtained in long gap experiments and in an altitude triggered lightning experiment. The model is then used to estimate the leader inception conditions for free standing rods as a function of tip radius and height. It is found that the rod radius slightly affects the height of the downward leader tip necessary to initiate upward leaders. Only an improvement of about 10% on the lightning attractiveness can be reached by using lightning rods with an optimum radius. Based on the obtained results, the field observations of competing lightning rods are explained. Furthermore, the influence of the average stepped leader velocity on the inception of positive upward leaders is evaluated. The results obtained show that the rate of change of the background electric field produced by a downward leader descent largely influences the conditions necessary for upward leader initiation. Estimations of the leader inception conditions for the upper and lower limit of the measured values of the average downward lightning leader velocity differ by more than 80%. In addition, the striking distances calculated taking into account the temporal change of the background field are significantly larger than the ones obtained assuming a static downward leader field. The estimations of the present model are also compared with the existing leader inception models and discussed.

show abstract

Section: Calculation Of the Effective Striking Distancementioning

confidence: 99%

Time dependent evaluation of the lightning upward connecting leader inception

Becerra

Cooray

2006

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Since thunderclouds are mostly negatively charged, high electric fields are often induced on grounded tall objects, producing positive glow corona discharges. It has been suggested that the transition from glow corona to streamers is vital when investigating the initiation of upward lightning [5][6][7][8][9][10]. For the above-mentioned reasons, it is of great interest to evaluate the conditions required for the transition from stable glow corona to streamers.…”

Section: Introductionmentioning

confidence: 99%

On the transition from stable positive glow corona to streamers

Liu¹,

Becerra²

2016

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

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.

show abstract

“…Even though the space charge produced at the tip of grounded structures may influence the initiation of upward leaders [105][106][107], the space charge left behind the rocket also affects the leader inception conditions in triggered lightning experiments as shown in Paper I. This effect had not been taken into consideration by any other leader inception model before.…”

Section: On the Validity Of The Existing Leader Inception Models For mentioning

confidence: 96%

“…Even though extensive work has been done on the local space charges created by corona at the tip of a grounded object [105][106][107], a thorough analysis of the effect of the space charge layer on the inception of upward leaders is not available in the literature. Thus, Paper VI presents the simulation of the space charge layer created during a thunderstorm and the analysis of its influence on the thundercloud electric fields required to incept upward lightning positive leaders from tall towers.…”

Section: The Space Charge Layer and The Initiation Of Upward Lightningmentioning

confidence: 99%

Attachment of lightning flashes to grounded structures

Becerra¹

2010

Lightning Protection

View full text Add to dashboard Cite

The effect of a corona discharge on a lightning attachment

Cited by 42 publications

References 13 publications

Time dependent evaluation of the lightning upward connecting leader inception

Time dependent evaluation of the lightning upward connecting leader inception

On the transition from stable positive glow corona to streamers

Attachment of lightning flashes to grounded structures

Contact Info

Product

Resources

About