Navegar

Colección

Datos Estadísticas

Artículo

El editor permite incluir el artículo en su versión final en nuestro repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

Experimental observations on the plasma dynamics inside the nozzle of a 30 A oxygen cutting torch operated at conditions close to the double arcing are reported. It is employed a technique previously developed in our laboratory consisting in using the nozzle as a large-sized Langmuir probe. Based on the behavior of the ion current signal and simple estimations, it is concluded that (1) the non-equilibrium plasma inside the nozzle is far from the steady state in time, in contrast to what is frequently assumed. The power supply ripple was identified as the main fluctuations source and (2) large-scale plasma fluctuations inside the nozzle could cause transient (total duration of the order of 100 μs) Townsend avalanches developing in the space-charge layer located between the arc plasma and the nozzle wall. Such events trigger the so called non-destructive double-arcing phenomena without appealing to the presence of insulating films deposited inside the nozzle orifice, as was previously proposed in the literature. © 2011 American Institute of Physics.

Registro:

Documento: Artículo
Título:On the dynamics of the space-charge layer inside the nozzle of a cutting torch and its relation with the "non-destructive" double-arcing phenomenon
Autor:Prevosto, L.; Kelly, H.; Mancinelli, B.
Filiación:Grupo de Descargas Eléctricas, Departamento Ingeniería Electromecnica, Facultad Regional Venado Tuerto (UTN), Laprida 651, (2600) Venado Tuerto (Santa Fe), Argentina
Instituto de Física Del Plasma (CONICET), Departamento de Física, Ciudad Universitaria Pab. i, (1428) Buenos Aires, Argentina
Palabras clave:Arc plasma; Cutting torch; Experimental observation; Insulating film; Ion-current signal; Non destructive; Nonequilibrium plasmas; Nozzle orifice; Nozzle wall; Plasma dynamics; Plasma fluctuations; Power supply; Space charges; Steady state; Dynamics; Oxygen cutting; Plasma diagnostics; Plasmas; Nozzles
Año:2011
Volumen:110
Número:8
DOI: http://dx.doi.org/10.1063/1.3651398
Título revista:Journal of Applied Physics
Título revista abreviado:J Appl Phys
ISSN:00218979
CODEN:JAPIA
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00218979_v110_n8_p_Prevosto.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v110_n8_p_Prevosto

Referencias:

  • Nemchinsky, V.A., Severance, W.S., (2006) J. Phys. D: Appl. Phys., 39, p. 423. , 10.1088/0022-3727/39/22/R01
  • Nemchinsky, V.A., (1998) J. Phys. D: Appl. Phys., 31, p. 3102. , 10.1088/0022-3727/31/21/016
  • Prevosto, L., Kelly, H., Mancinelli, B., (2009) J. Appl. Phys., 105, p. 013309. , 10.1063/1.3041636
  • Prevosto, L., Kelly, H., Mancinelli, B., (2009) J. Appl. Phys., 105, p. 123303. , 10.1063/1.3153147
  • Nemchinsky, V.A., (2009) J. Phys. D: Appl. Phys., 42, p. 205209. , 10.1088/0022-3727/42/20/205209
  • Colombo, V., Concetti, A., Ghedini, E., Dallavalle, S., Vancini, M., (2009) Plasma Sources Sci. Technol., 18, p. 023001. , 10.1088/0963-0252/18/2/023001
  • Rat, V., Coudert, J.F., (2010) J. Appl. Phys., 108, p. 043304. , 10.1063/1.3466982
  • Coudert, J.F., Rat, V., (2008) J. Phys. D: Appl. Phys., 41, p. 205208. , 10.1088/0022-3727/41/20/205208
  • Ghorui, S., Das, A.K., (2004) Phys. Rev. e, 69, p. 026408. , 10.1103/PhysRevE.69.026408
  • Prevosto, L., Kelly, H., Mancinelli, B., (2008) IEEE Trans. Plasma Sci., 36, p. 263. , 10.1109/TPS.2007.914176
  • Prevosto, L., Kelly, H., Minotti, F.O., (2008) IEEE Trans. Plasma Sci., 36, p. 271. , 10.1109/TPS.2007.914182
  • Van De Sanden, M.C.M., Schram, P.P.J.M., Peeters, A.G., Van Der Mullen, J.A.M., Kroesen, G.M.W., (1989) Phys. Rev. A, 40, p. 5273. , 10.1103/PhysRevA.40.5273
  • Sheridan, T.E., Goree, J., (1991) Phys. Fluids B, 3, p. 2796. , 10.1063/1.859987
  • Franklin, R.N., (2002) IEEE Trans. Plasma Sci., 30, p. 352. , 10.1109/TPS.2002.1003879
  • Ghorui, S., Heberlein, J.V.R., Pfender, E., (2007) J. Phys. D: Appl. Phys., 40, p. 1966. , 10.1088/0022-3727/40/7/020
  • Noble, B., (1964) Numerical Methods: 2 Differences, Integration and Differential Equations, , (Oliver and Boyd Ltd., Edinburgh)
  • Hackam, R., (1969) J. Phys. B, 2, p. 216. , 10.1088/0022-3700/2/2/309
  • Raizer, Y.P., (1991) Gas Discharge Physics, , (Springer, Berlin, Germany)
  • Freton, P., Gonzalez, J.J., Gleizes, A., Camy Peyret, F., Caillibotte, G., Delzenne, M., (2002) J. Phys. D: Appl. Phys., 35, p. 115. , 10.1088/0022-3727/35/2/304

Citas:

---------- APA ----------
Prevosto, L., Kelly, H. & Mancinelli, B. (2011) . On the dynamics of the space-charge layer inside the nozzle of a cutting torch and its relation with the "non-destructive" double-arcing phenomenon. Journal of Applied Physics, 110(8).
http://dx.doi.org/10.1063/1.3651398
---------- CHICAGO ----------
Prevosto, L., Kelly, H., Mancinelli, B. "On the dynamics of the space-charge layer inside the nozzle of a cutting torch and its relation with the "non-destructive" double-arcing phenomenon" . Journal of Applied Physics 110, no. 8 (2011).
http://dx.doi.org/10.1063/1.3651398
---------- MLA ----------
Prevosto, L., Kelly, H., Mancinelli, B. "On the dynamics of the space-charge layer inside the nozzle of a cutting torch and its relation with the "non-destructive" double-arcing phenomenon" . Journal of Applied Physics, vol. 110, no. 8, 2011.
http://dx.doi.org/10.1063/1.3651398
---------- VANCOUVER ----------
Prevosto, L., Kelly, H., Mancinelli, B. On the dynamics of the space-charge layer inside the nozzle of a cutting torch and its relation with the "non-destructive" double-arcing phenomenon. J Appl Phys. 2011;110(8).
http://dx.doi.org/10.1063/1.3651398