Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.13/4553 |
Resumo: | The stability of stationary spots on cathodes of arcs in vacuum and ambient gas is investigated by means of the simulation of the temporal evolution of perturbations imposed over steady-state solutions. Two cases of loading conditions are considered, namely, spots operating at a fixed current (the case typical of small-scale experiments) and spots operating at a fixed voltage (the case typical of high-power circuit breakers). Results are reported on spots on large copper cathodes of vacuum arcs and on spots on tungsten cathodes of high-pressure argon arcs. It is shown, in particular, that if the ballast resistance in small-scale laboratory experiments with a high-current arc is insufficient, the potential consequence may be a thermal explosion of a spot, if the arc burns in vacuum, and massive melting of the cathode surface, if the arc burns in ambient gas. This conclusion conforms to trends observed in the experiment. |
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Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gasStabilityCathode spotsStationary solutionsArcs in vacuum and ambient gas.Faculdade de ciências Exatas e da EngenhariaThe stability of stationary spots on cathodes of arcs in vacuum and ambient gas is investigated by means of the simulation of the temporal evolution of perturbations imposed over steady-state solutions. Two cases of loading conditions are considered, namely, spots operating at a fixed current (the case typical of small-scale experiments) and spots operating at a fixed voltage (the case typical of high-power circuit breakers). Results are reported on spots on large copper cathodes of vacuum arcs and on spots on tungsten cathodes of high-pressure argon arcs. It is shown, in particular, that if the ballast resistance in small-scale laboratory experiments with a high-current arc is insufficient, the potential consequence may be a thermal explosion of a spot, if the arc burns in vacuum, and massive melting of the cathode surface, if the arc burns in ambient gas. This conclusion conforms to trends observed in the experiment.IOP PublishingDigitUMaBenilov, M. S.Cunha, M. D.Hartmann, W.Wenzel, N.2022-09-02T11:12:13Z2014-01-01T00:00:00Z2014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.13/4553engBenilov, M. S., Cunha, M. D., Hartmann, W., & Wenzel, N. (2014). Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas. Plasma Sources Science and Technology, 23(5), 054007.10.1088/0963-0252/23/5/054007info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-05T12:57:53Zoai:digituma.uma.pt:10400.13/4553Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:08:40.828771Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas |
title |
Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas |
spellingShingle |
Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas Benilov, M. S. Stability Cathode spots Stationary solutions Arcs in vacuum and ambient gas . Faculdade de ciências Exatas e da Engenharia |
title_short |
Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas |
title_full |
Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas |
title_fullStr |
Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas |
title_full_unstemmed |
Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas |
title_sort |
Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas |
author |
Benilov, M. S. |
author_facet |
Benilov, M. S. Cunha, M. D. Hartmann, W. Wenzel, N. |
author_role |
author |
author2 |
Cunha, M. D. Hartmann, W. Wenzel, N. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
DigitUMa |
dc.contributor.author.fl_str_mv |
Benilov, M. S. Cunha, M. D. Hartmann, W. Wenzel, N. |
dc.subject.por.fl_str_mv |
Stability Cathode spots Stationary solutions Arcs in vacuum and ambient gas . Faculdade de ciências Exatas e da Engenharia |
topic |
Stability Cathode spots Stationary solutions Arcs in vacuum and ambient gas . Faculdade de ciências Exatas e da Engenharia |
description |
The stability of stationary spots on cathodes of arcs in vacuum and ambient gas is investigated by means of the simulation of the temporal evolution of perturbations imposed over steady-state solutions. Two cases of loading conditions are considered, namely, spots operating at a fixed current (the case typical of small-scale experiments) and spots operating at a fixed voltage (the case typical of high-power circuit breakers). Results are reported on spots on large copper cathodes of vacuum arcs and on spots on tungsten cathodes of high-pressure argon arcs. It is shown, in particular, that if the ballast resistance in small-scale laboratory experiments with a high-current arc is insufficient, the potential consequence may be a thermal explosion of a spot, if the arc burns in vacuum, and massive melting of the cathode surface, if the arc burns in ambient gas. This conclusion conforms to trends observed in the experiment. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01-01T00:00:00Z 2014-01-01T00:00:00Z 2022-09-02T11:12:13Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.13/4553 |
url |
http://hdl.handle.net/10400.13/4553 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Benilov, M. S., Cunha, M. D., Hartmann, W., & Wenzel, N. (2014). Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas. Plasma Sources Science and Technology, 23(5), 054007. 10.1088/0963-0252/23/5/054007 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
IOP Publishing |
publisher.none.fl_str_mv |
IOP Publishing |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799129954783330304 |