Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch

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Double-arcing is a phenomenon that occurs when a transferred arc, flowing inside an electrically insulated nozzle, breaks into two separate arcs: one that connects the cathode with the nozzle, and another that connects the nozzle with the anode. Experimental evidence suggests that the reason for dou...

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Autores principales: Mancinelli, B., Prevosto, L., Minotti, F.O.
Formato: Documento de conferencia publishedVersion
Lenguaje:Inglés
Publicado: 2012
Materias:
Electric breakdown
Electric breakdown of gases
Electric discharges
Electric space charge
Electrodes
Impact ionization
Ionization of gases
Ions
Oxygen cutting
Partial discharges
Plasma torches
Breakdown phenomena
Electron attachment
Electron-ion recombinations
Experimental evidence
High temperature gas
Ion-ion recombinations
Metallic electrodes
Space charge layers
Nozzles
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17426588_v370_n1_p_Mancinelli
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paperaa:paper_17426588_v370_n1_p_Mancinelli
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spelling paperaa:paper_17426588_v370_n1_p_Mancinelli2023-06-12T16:51:05Z Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch J. Phys. Conf. Ser. 2012;370(1) Mancinelli, B. Prevosto, L. Minotti, F.O. Electric breakdown Electric breakdown of gases Electric discharges Electric space charge Electrodes Impact ionization Ionization of gases Ions Oxygen cutting Partial discharges Plasma torches Breakdown phenomena Electron attachment Electron-ion recombinations Experimental evidence High temperature gas Ion-ion recombinations Metallic electrodes Space charge layers Nozzles Double-arcing is a phenomenon that occurs when a transferred arc, flowing inside an electrically insulated nozzle, breaks into two separate arcs: one that connects the cathode with the nozzle, and another that connects the nozzle with the anode. Experimental evidence suggests that the reason for double-arcing is a Townsend like breakdown occurring in the thin space-charge layer, which separates the plasma from the metallic nozzle, due to the high voltage drop across it. Breakdown phenomena in a gas between metallic electrodes have been extensively studied; however the present case involves breakdown of a high-temperature gas between one electrode (the nozzle) and a plasma boundary. A 1-D model of the gas breakdown development in the space-charge layer contiguous to the nozzle of a cutting arc torch operated with oxygen is reported. The dynamics of the discharge is analyzed. The kinetic scheme includes processes of ionization of heavy particles by electron impact, electron attachment, electron-ion recombination and ion-ion recombination. Fil:Minotti, F.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 info:eu-repo/semantics/conferenceObject info:ar-repo/semantics/documento de conferencia info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_17426588_v370_n1_p_Mancinelli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
topic Electric breakdown
Electric breakdown of gases
Electric discharges
Electric space charge
Electrodes
Impact ionization
Ionization of gases
Ions
Oxygen cutting
Partial discharges
Plasma torches
Breakdown phenomena
Electron attachment
Electron-ion recombinations
Experimental evidence
High temperature gas
Ion-ion recombinations
Metallic electrodes
Space charge layers
Nozzles
spellingShingle Electric breakdown
Electric breakdown of gases
Electric discharges
Electric space charge
Electrodes
Impact ionization
Ionization of gases
Ions
Oxygen cutting
Partial discharges
Plasma torches
Breakdown phenomena
Electron attachment
Electron-ion recombinations
Experimental evidence
High temperature gas
Ion-ion recombinations
Metallic electrodes
Space charge layers
Nozzles
Mancinelli, B.
Prevosto, L.
Minotti, F.O.
Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch
topic_facet Electric breakdown
Electric breakdown of gases
Electric discharges
Electric space charge
Electrodes
Impact ionization
Ionization of gases
Ions
Oxygen cutting
Partial discharges
Plasma torches
Breakdown phenomena
Electron attachment
Electron-ion recombinations
Experimental evidence
High temperature gas
Ion-ion recombinations
Metallic electrodes
Space charge layers
Nozzles
description Double-arcing is a phenomenon that occurs when a transferred arc, flowing inside an electrically insulated nozzle, breaks into two separate arcs: one that connects the cathode with the nozzle, and another that connects the nozzle with the anode. Experimental evidence suggests that the reason for double-arcing is a Townsend like breakdown occurring in the thin space-charge layer, which separates the plasma from the metallic nozzle, due to the high voltage drop across it. Breakdown phenomena in a gas between metallic electrodes have been extensively studied; however the present case involves breakdown of a high-temperature gas between one electrode (the nozzle) and a plasma boundary. A 1-D model of the gas breakdown development in the space-charge layer contiguous to the nozzle of a cutting arc torch operated with oxygen is reported. The dynamics of the discharge is analyzed. The kinetic scheme includes processes of ionization of heavy particles by electron impact, electron attachment, electron-ion recombination and ion-ion recombination.
format Documento de conferencia
Documento de conferencia
publishedVersion
author Mancinelli, B.
Prevosto, L.
Minotti, F.O.
author_facet Mancinelli, B.
Prevosto, L.
Minotti, F.O.
author_sort Mancinelli, B.
title Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch
title_short Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch
title_full Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch
title_fullStr Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch
title_full_unstemmed Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch
title_sort numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch
publishDate 2012
url http://hdl.handle.net/20.500.12110/paper_17426588_v370_n1_p_Mancinelli
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AT prevostol numericalmodelingofthegasbreakdowndevelopmentinthespacechargelayerinsidethenozzleofatransferredarctorch
AT minottifo numericalmodelingofthegasbreakdowndevelopmentinthespacechargelayerinsidethenozzleofatransferredarctorch
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