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

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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Autor principal: Kelly, Héctor Juan
Publicado: 2009
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v166_n_p_Prevosto
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 paper:paper_17426588_v166_n_p_Prevosto2023-06-08T16:27:12Z On the influence of the nozzle length on the arc properties in a cutting torch Kelly, Héctor Juan 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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v166_n_p_Prevosto 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)
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.
author Kelly, Héctor Juan
spellingShingle Kelly, Héctor Juan
On the influence of the nozzle length on the arc properties in a cutting torch
author_facet Kelly, Héctor Juan
author_sort Kelly, Héctor Juan
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 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v166_n_p_Prevosto
http://hdl.handle.net/20.500.12110/paper_17426588_v166_n_p_Prevosto
work_keys_str_mv AT kellyhectorjuan ontheinfluenceofthenozzlelengthonthearcpropertiesinacuttingtorch
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