On the dynamics of streamer-to-leader transition in long air gap discharges
2016 (English)Conference paper (Refereed)
In this paper, a self-consistent numerical model is employed to investigate the ionization kinetics of the streamer-to-leader transition in long air gap discharges. The model focuses on the dynamics of the discharge channel in the radial direction using a 1D radial system by taking into account 21 species and 106 chemical reactions. The detailed dynamics of the streamer-to-leader transition after a sequence of streamer bursts, dark periods and aborted leaders are discussed. The calculations are performed for a 1 m long rod-plate configuration using the current measured in experiments reported in the literature. The results show that the average central temperature of a newly formed and a self-propagating stable leader segment is around 2000K and 3000K, respectively. The instant temperature in the gap as a leader segment is incepted can reach 5000K. The predictions of temperature and thermal radius of the leader channel agree well with previous experimental studies.
Place, publisher, year, edition, pages
Nagoya, Japan, 2016.
Electrical Engineering, Electronic Engineering, Information Engineering
Research subject Electrical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-188513OAI: oai:DiVA.org:kth-188513DiVA: diva2:935687
21st International Conference on Gas Discharges and Their Applications (GD2016)
QC 201607112016-06-122016-06-122016-07-11Bibliographically approved