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On the transition from stable positive glow corona to streamers
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0001-5378-701X
KTH, School of Electrical Engineering (EES), Electromagnetic Engineering.ORCID iD: 0000-0002-6375-6142
2016 (English)In: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 49, no 22, 225202- p.Article in journal (Refereed) Published
Abstract [en]

A 2D 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.

Place, publisher, year, edition, pages
Institute of Physics (IOP), 2016. Vol. 49, no 22, 225202- p.
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Fusion, Plasma and Space Physics
Research subject
Electrical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-186204DOI: 10.1088/0022-3727/49/22/225202ISI: 000377410800010ScopusID: 2-s2.0-84971571485OAI: oai:DiVA.org:kth-186204DiVA: diva2:926121
Note

QC 20160510

Available from: 2016-05-04 Created: 2016-05-04 Last updated: 2016-07-05Bibliographically approved

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The full text will be freely available from 2017-05-04 15:38
Available from 2017-05-04 15:38

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