Conferencia
Abstract:
The dynamic behavior of the anode-arc-root at the nozzle surface of a plasma torch was experimentally investigated in this work. A gas (N2) vortex-stabilized non-transferred arc torch with a thoriated tungsten rod (2wt %) cathode (3.2 mm diameter) and a coaxial anode (5 mm diameter, 30 mm length) was used in the experiment. By using a sweeping Langmuir probe in floating condition, the voltage of the plasma jet outside the nozzle was inferred. Arc voltage waveforms were also obtained. Data have been obtained for an arc current of 100 A and a gas flow rate of 30 Nl min-1. A typical sawtooth shape (i.e., restrike mode) (with a fluctuating level of ≈ ± 25 %) and a dominant frequency of ≈ 6.5 kHz was observed in the arc voltage waveforms, which is attributed to anode-arc-root movements along the anode surface followed by a restrike at a certain point close to the cathode. By performing a time correlation between the probe and arc voltage oscillograms together with simple estimations, the amplitude of the movement of the arc-root along the anode surface as well its velocity were inferred.
Registro:
| Documento: | Conferencia |
| Título: | On the dynamic behavior of the anode-arc-root at the nozzle surface in a non-transferred plasma torch |
| Autor: | Prevosto, L.; Risso, M.; Infante, D.; Cejas, E.; Kelly, H.; Mancinelli, B. |
| 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: | Anodes; Cathodes; Dynamics; Electrodes; Fighter aircraft; Flow of gases; Nozzles; Plasma jets; Plasma torches; Probes; Anode surfaces; Dominant frequency; Dynamic behaviors; Floating conditions; Nozzle surface; Thoriated tungsten; Time correlations; Transferred arcs; Hard facing |
| Año: | 2012 |
| Volumen: | 370 |
| Número: | 1 |
| DOI: | http://dx.doi.org/10.1088/1742-6596/370/1/012048 |
| 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_Prevosto.pdf |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_17426588_v370_n1_p_Prevosto |
Referencias:
- Boulos, M., Fauchais, P., Pfender, E., (1994) Thermal Plasmas, Fundamentals and Applications, 1. , New York: Plenum Press
- Fauchais, P., (2004) J. Phys. D: Appl. Phys., 37, pp. R86
- Prevosto, L., Kelly, H., Mancinelli, B., (2008) IEEE Trans. Plasma Sci., 36, p. 263
- Fauchais, P., Vardelle, A., (1997) IEEE Trans. Plasma Sci., 25, p. 1258
- Raizer, Y.P., (1991) Gas Discharge Physics, , Berlin: Springer
- Trelles, J.P., Chazelas, C., Vardelle, A., Heberlein, J.V.R., (2009) J. Therm. Spray Technol., 15, p. 524A4 - Agencia Nacional de Promocion Cientifica y Tecnologica (ANPCyT); Centro Latino-Americano de Fisica (CLAF); Comision Nacional de Energia Atomica (CNEA); Cons. Nac. Invest. Cient. Tec. (CONICET); et al.; Instituto de Fisica del Plasma (INFIP)
Citas:
---------- APA ----------
Prevosto, L., Risso, M., Infante, D., Cejas, E., Kelly, H. & Mancinelli, B. (2012) . On the dynamic behavior of the anode-arc-root at the nozzle surface in a non-transferred plasma torch. 14th Latin American Workshop on Plasma Physics, LAWPP 2011, 370(1).http://dx.doi.org/10.1088/1742-6596/370/1/012048
---------- CHICAGO ----------
Prevosto, L., Risso, M., Infante, D., Cejas, E., Kelly, H., Mancinelli, B. "On the dynamic behavior of the anode-arc-root at the nozzle surface in a non-transferred plasma torch" . 14th Latin American Workshop on Plasma Physics, LAWPP 2011 370, no. 1 (2012).http://dx.doi.org/10.1088/1742-6596/370/1/012048
---------- MLA ----------
Prevosto, L., Risso, M., Infante, D., Cejas, E., Kelly, H., Mancinelli, B. "On the dynamic behavior of the anode-arc-root at the nozzle surface in a non-transferred plasma torch" . 14th Latin American Workshop on Plasma Physics, LAWPP 2011, vol. 370, no. 1, 2012.http://dx.doi.org/10.1088/1742-6596/370/1/012048
---------- VANCOUVER ----------
Prevosto, L., Risso, M., Infante, D., Cejas, E., Kelly, H., Mancinelli, B. On the dynamic behavior of the anode-arc-root at the nozzle surface in a non-transferred plasma torch. J. Phys. Conf. Ser. 2012;370(1).http://dx.doi.org/10.1088/1742-6596/370/1/012048
