On the influence of the nozzle length on the arc properties in a cutting torch

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In this work, an experimental study on the influence of the nozzle geometry on the physical properties of a cutting arc is reported. Ion current signals collected by an electrostatic probe sweeping across a 30 A oxygen cutting arc at 3.5 mm from the nozzle exit were registered for different nozzle l...

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Autores principales: Prevosto, L., Kelly, H., Risso, M., Infante, D.
Formato: Documento de conferencia publishedVersion
Lenguaje:Inglés
Publicado: 2009
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_17426588_v166_n_p_Prevosto
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paperaa:paper_17426588_v166_n_p_Prevosto2023-06-12T16:51:00Z On the influence of the nozzle length on the arc properties in a cutting torch J. Phys. Conf. Ser. 2009;166 Prevosto, L. Kelly, H. Risso, M. Infante, D. In this work, an experimental study on the influence of the nozzle geometry on the physical properties of a cutting arc is reported. Ion current signals collected by an electrostatic probe sweeping across a 30 A oxygen cutting arc at 3.5 mm from the nozzle exit were registered for different nozzle lengths. The temperature and density radial profiles of the arc plasma were found in each case by an inversion procedure of these signals. A comparison between the obtained results shows that the shorter nozzle (RN = 0.50 mm, L N = 4.5 mm operated at 0.7 MPa and 35 Nl/min) produces a thinner and hotter arc than the larger nozzle (RN = 0.50 mm, LN = 9.0 mm operated at 1.1 MPa and 20 Nl/min). This behavior is attributed to the marked difference of gas flow rate due to the clogging effect. A smaller gas mass flow reduces the convective cooling at the arc border and decreases the power dissipation of the arc column, resulting in small axis temperatures. © 2009 IOP Publishing Ltd. Fil:Kelly, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 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_v166_n_p_Prevosto
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
description In this work, an experimental study on the influence of the nozzle geometry on the physical properties of a cutting arc is reported. Ion current signals collected by an electrostatic probe sweeping across a 30 A oxygen cutting arc at 3.5 mm from the nozzle exit were registered for different nozzle lengths. The temperature and density radial profiles of the arc plasma were found in each case by an inversion procedure of these signals. A comparison between the obtained results shows that the shorter nozzle (RN = 0.50 mm, L N = 4.5 mm operated at 0.7 MPa and 35 Nl/min) produces a thinner and hotter arc than the larger nozzle (RN = 0.50 mm, LN = 9.0 mm operated at 1.1 MPa and 20 Nl/min). This behavior is attributed to the marked difference of gas flow rate due to the clogging effect. A smaller gas mass flow reduces the convective cooling at the arc border and decreases the power dissipation of the arc column, resulting in small axis temperatures. © 2009 IOP Publishing Ltd.
format Documento de conferencia
Documento de conferencia
publishedVersion
author Prevosto, L.
Kelly, H.
Risso, M.
Infante, D.
spellingShingle Prevosto, L.
Kelly, H.
Risso, M.
Infante, D.
On the influence of the nozzle length on the arc properties in a cutting torch
author_facet Prevosto, L.
Kelly, H.
Risso, M.
Infante, D.
author_sort Prevosto, L.
title On the influence of the nozzle length on the arc properties in a cutting torch
title_short On the influence of the nozzle length on the arc properties in a cutting torch
title_full On the influence of the nozzle length on the arc properties in a cutting torch
title_fullStr On the influence of the nozzle length on the arc properties in a cutting torch
title_full_unstemmed On the influence of the nozzle length on the arc properties in a cutting torch
title_sort on the influence of the nozzle length on the arc properties in a cutting torch
publishDate 2009
url http://hdl.handle.net/20.500.12110/paper_17426588_v166_n_p_Prevosto
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