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Using low-level currents measured during lightning events to estimate upward leader properties
KTH, School of Electrical Engineering and Computer Science (EECS), Electromagnetic Engineering.ORCID iD: 0000-0002-6375-6142
KTH, School of Electrical Engineering and Computer Science (EECS), Electromagnetic Engineering.
2018 (English)In: 34th International Conference on Lightning Protection, ICLP 2018, Institute of Electrical and Electronics Engineers Inc. , 2018Conference paper, Published paper (Refereed)
Abstract [en]

Low-level currents measured prior to return strokes can potentially provide information about the properties of upward leaders during lightning flashes. However, these currents need to be properly analysed and interpreted in order to be useful for evaluating upward connecting leaders. In this paper, low-level currents measured before return strokes in two lightning events to two structures in Brazil are analysed and interpreted as case studies. The discharge current estimated from one of these events is used as input to a detailed thermohydrodynamic model with an extensive kinetic scheme for N2/O2 mixtures. The model allows the evaluation of the physical and chemical properties of upward connecting leaders. Estimates of the temperature, mass density, electric field and radius of the channel are presented for an upward connecting leader propagating in a lightning event. In addition, estimates of the axial density of electrons, ions and neutral particles (including NO and NO2) are also reported.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc. , 2018.
Keywords [en]
leaders, lightning, thermohydrodynamic model, Lightning protection, Connecting leaders, Discharge currents, Lightning flashes, Low-level current, Mass densities, Neutral particles, Physical and chemical properties
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-247118DOI: 10.1109/ICLP.2018.8503293Scopus ID: 2-s2.0-85056843937ISBN: 9781538666357 (print)OAI: oai:DiVA.org:kth-247118DiVA, id: diva2:1301896
Conference
34th International Conference on Lightning Protection, ICLP 2018, 2 September 2018 through 7 September 2018
Note

QC 20190403

Available from: 2019-04-03 Created: 2019-04-03 Last updated: 2019-04-03Bibliographically approved

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Becerra Garcia, MarleyLiu, Lige

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
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  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
More languages
Output format
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  • asciidoc
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