Conferencia
Abstract:
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.
Registro:
| Documento: | Conferencia |
| Título: | Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch |
| Autor: | Mancinelli, B.; Prevosto, L.; Minotti, F.O. |
| Ciudad: | Mar del Plata |
| Filiación: | Grupo de Descargas Eléctricas, Departamento Ing. Electromecánica, Universidad Tecnológica Nacional, Laprida 651, 2600 Venado Tuerto, Santa Fe, Argentina Instituto de Física del Plasma (CONICET), Departamento de Física, Facultad de Ciencias Exactas Y Naturales (UBA) Ciudad Universitaria Pab. I, 1428 Buenos Aires, Argentina |
| Palabras clave: | 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 |
| Año: | 2012 |
| Volumen: | 370 |
| Número: | 1 |
| DOI: | http://dx.doi.org/10.1088/1742-6596/370/1/012035 |
| Título revista: | 14th Latin American Workshop on Plasma Physics, LAWPP 2011 |
| Título revista abreviado: | J. Phys. Conf. Ser. |
| ISSN: | 17426588 |
| PDF: | https://bibliotecadigital.exactas.uba.ar/download/paper/paper_17426588_v370_n1_p_Mancinelli.pdf |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v370_n1_p_Mancinelli |
Referencias:
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Citas:
---------- APA ----------
Mancinelli, B., Prevosto, L. & Minotti, F.O. (2012) . Numerical modeling of the gas breakdown development in the space-charge layer inside the nozzle of a transferred arc torch. 14th Latin American Workshop on Plasma Physics, LAWPP 2011, 370(1).http://dx.doi.org/10.1088/1742-6596/370/1/012035
---------- CHICAGO ----------
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" . 14th Latin American Workshop on Plasma Physics, LAWPP 2011 370, no. 1 (2012).http://dx.doi.org/10.1088/1742-6596/370/1/012035
---------- MLA ----------
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" . 14th Latin American Workshop on Plasma Physics, LAWPP 2011, vol. 370, no. 1, 2012.http://dx.doi.org/10.1088/1742-6596/370/1/012035
---------- VANCOUVER ----------
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. J. Phys. Conf. Ser. 2012;370(1).http://dx.doi.org/10.1088/1742-6596/370/1/012035
