Experimental characterization of a low-current cutting torch

An experimental characterization of a low-current (30-40 A) cutting torch is presented. To avoid contamination of the plasma arc by removed anode material, a rotating steel cylinder was used as the anode and the arc was anchored onto the cylinder lateral surface. The cathode-anode and cathode-nozzle...

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Autores principales: Kelly, H., Mancinelli, B., Prevosto, L., Minotti, F.O., Márquez, A.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01039733_v34_n4B_p1518_Kelly
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01039733_v34_n4B_p1518_Kelly
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spelling todo:paper_01039733_v34_n4B_p1518_Kelly2023-10-03T14:57:34Z Experimental characterization of a low-current cutting torch Kelly, H. Mancinelli, B. Prevosto, L. Minotti, F.O. Márquez, A. An experimental characterization of a low-current (30-40 A) cutting torch is presented. To avoid contamination of the plasma arc by removed anode material, a rotating steel cylinder was used as the anode and the arc was anchored onto the cylinder lateral surface. The cathode-anode and cathode-nozzle voltage drops, together with the gas pressure in the plenum chamber were registered for different values of the mass flow rate injected into the plenum chamber. By employing an optical system with a large magnification (≈ 15 X), the arc radius at the nozzle exit was also determined with a digital optical camera. The obtained experimental quantities were used to evaluate several flow properties at the nozzle exit (hot arc plasma and cold gas temperatures, arc and gas velocities, etc.) by employing a simplified theoretical model for the plasma flow in the nozzle. The obtained results are in reasonable agreement with the data reported in the literature by other authors. Explanations of the origin of the clogging effect and the nozzle voltage are also presented. Fil:Kelly, H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Minotti, F.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Márquez, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01039733_v34_n4B_p1518_Kelly
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description An experimental characterization of a low-current (30-40 A) cutting torch is presented. To avoid contamination of the plasma arc by removed anode material, a rotating steel cylinder was used as the anode and the arc was anchored onto the cylinder lateral surface. The cathode-anode and cathode-nozzle voltage drops, together with the gas pressure in the plenum chamber were registered for different values of the mass flow rate injected into the plenum chamber. By employing an optical system with a large magnification (≈ 15 X), the arc radius at the nozzle exit was also determined with a digital optical camera. The obtained experimental quantities were used to evaluate several flow properties at the nozzle exit (hot arc plasma and cold gas temperatures, arc and gas velocities, etc.) by employing a simplified theoretical model for the plasma flow in the nozzle. The obtained results are in reasonable agreement with the data reported in the literature by other authors. Explanations of the origin of the clogging effect and the nozzle voltage are also presented.
format JOUR
author Kelly, H.
Mancinelli, B.
Prevosto, L.
Minotti, F.O.
Márquez, A.
spellingShingle Kelly, H.
Mancinelli, B.
Prevosto, L.
Minotti, F.O.
Márquez, A.
Experimental characterization of a low-current cutting torch
author_facet Kelly, H.
Mancinelli, B.
Prevosto, L.
Minotti, F.O.
Márquez, A.
author_sort Kelly, H.
title Experimental characterization of a low-current cutting torch
title_short Experimental characterization of a low-current cutting torch
title_full Experimental characterization of a low-current cutting torch
title_fullStr Experimental characterization of a low-current cutting torch
title_full_unstemmed Experimental characterization of a low-current cutting torch
title_sort experimental characterization of a low-current cutting torch
url http://hdl.handle.net/20.500.12110/paper_01039733_v34_n4B_p1518_Kelly
work_keys_str_mv AT kellyh experimentalcharacterizationofalowcurrentcuttingtorch
AT mancinellib experimentalcharacterizationofalowcurrentcuttingtorch
AT prevostol experimentalcharacterizationofalowcurrentcuttingtorch
AT minottifo experimentalcharacterizationofalowcurrentcuttingtorch
AT marqueza experimentalcharacterizationofalowcurrentcuttingtorch
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