Numerical investigation of the stability of stationary solutions in the theory of cathode spots in arcs in vacuum and ambient gas

Detalhes bibliográficos
Autor(a) principal: Benilov, M. S.
Data de Publicação: 2014
Outros Autores: Cunha, M. D., Hartmann, W., Wenzel, N.
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.
id RCAP_269745fc0360cb9bfb17a9bb97373473
oai_identifier_str oai:digituma.uma.pt:10400.13/4553
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling 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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str 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
_version_ 1799129954783330304

Registros relacionados