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Analysis of light emission and Schlieren from short gap high voltage streamers representing lightning impulses
Light emissions and Schlieren structures were simultaneously observed from streamers produced by tens of kilovolts 1.2/50 μs impulses, representing the high voltage component of lightning, applied across a 4 cm air gap between a variety of electrode geometries and a ground plane in an unconfined env...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8692483/ https://www.ncbi.nlm.nih.gov/pubmed/34934151 http://dx.doi.org/10.1038/s41598-021-03839-y |
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author | Mitchard, D. Widger, P. Haddad, A. |
author_facet | Mitchard, D. Widger, P. Haddad, A. |
author_sort | Mitchard, D. |
collection | PubMed |
description | Light emissions and Schlieren structures were simultaneously observed from streamers produced by tens of kilovolts 1.2/50 μs impulses, representing the high voltage component of lightning, applied across a 4 cm air gap between a variety of electrode geometries and a ground plane in an unconfined environment. The results demonstrated that the light emissions and Schlieren structures coincide along the same streamer filaments but on different timescales; the light existing only during the microsecond timeframe impulse whereas the Schlieren continued to develop into the millisecond timeframe, moving towards the centre of the air gap whilst diffusing into the surrounding air within 100 ms. If an electrical breakdown did occur, the Schlieren structures outside the arc remained visible. Streamer formation theory for high voltage impulses is subsequently refined to include the observed Schlieren mechanism. |
format | Online Article Text |
id | pubmed-8692483 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-86924832021-12-28 Analysis of light emission and Schlieren from short gap high voltage streamers representing lightning impulses Mitchard, D. Widger, P. Haddad, A. Sci Rep Article Light emissions and Schlieren structures were simultaneously observed from streamers produced by tens of kilovolts 1.2/50 μs impulses, representing the high voltage component of lightning, applied across a 4 cm air gap between a variety of electrode geometries and a ground plane in an unconfined environment. The results demonstrated that the light emissions and Schlieren structures coincide along the same streamer filaments but on different timescales; the light existing only during the microsecond timeframe impulse whereas the Schlieren continued to develop into the millisecond timeframe, moving towards the centre of the air gap whilst diffusing into the surrounding air within 100 ms. If an electrical breakdown did occur, the Schlieren structures outside the arc remained visible. Streamer formation theory for high voltage impulses is subsequently refined to include the observed Schlieren mechanism. Nature Publishing Group UK 2021-12-21 /pmc/articles/PMC8692483/ /pubmed/34934151 http://dx.doi.org/10.1038/s41598-021-03839-y Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Mitchard, D. Widger, P. Haddad, A. Analysis of light emission and Schlieren from short gap high voltage streamers representing lightning impulses |
title | Analysis of light emission and Schlieren from short gap high voltage streamers representing lightning impulses |
title_full | Analysis of light emission and Schlieren from short gap high voltage streamers representing lightning impulses |
title_fullStr | Analysis of light emission and Schlieren from short gap high voltage streamers representing lightning impulses |
title_full_unstemmed | Analysis of light emission and Schlieren from short gap high voltage streamers representing lightning impulses |
title_short | Analysis of light emission and Schlieren from short gap high voltage streamers representing lightning impulses |
title_sort | analysis of light emission and schlieren from short gap high voltage streamers representing lightning impulses |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8692483/ https://www.ncbi.nlm.nih.gov/pubmed/34934151 http://dx.doi.org/10.1038/s41598-021-03839-y |
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