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Abstract:

Measurements of plasma velocities in a 30 A high energy density cutting torch are reported. The velocity diagnostic is based on the analysis of the light fluctuations emitted by the arc which are assumed to propagate with the flow velocity. These light fluctuations originate from plasma temperature and plasma density fluctuations mainly due to hydrodynamic instabilities. Fast photodiodes are employed as the light sensors. The arc core velocity was obtained from spectrally filtered light fluctuations measurements using a band-pass filter to detect light emission fluctuations emitted only from the arc axis. Maximum plasma jet velocities of 5000 m s -1 close to the nozzle exit and about 2000 m s -1 close to the anode were found. The obtained velocity values are in good agreement with those values predicted by a numerical code for a similar torch to that employed in this work. © 2009 American Institute of Physics.

Registro:

Documento: Artículo
Título:Determination of plasma velocity from light fluctuations in a cutting torch
Autor:Prevosto, L.; Kelly, H.; Mancinelli, B.
Filiación:Departamento Ing. Electromecánica, Grupo de Descargas Eĺctricas, Universidad Tecnológica Nacional, Regional Venado Tuerto, Las Heras 644, Venado Tuerto 2600, Pcia. Santa Fe, Argentina
Departamento de Física, Instituto de Física Del Plasma (CONICET), Ciudad Universitaria Pab. i, 1428 Buenos Aires, Argentina
Palabras clave:Cutting torch; High energy densities; Hydrodynamic instabilities; Light fluctuation; Light sensor; Nozzle exits; Numerical code; Plasma density fluctuations; Plasma temperature; Plasma velocity; Bandpass filters; Cavity resonators; Fluid dynamics; Plasma density; Plasma diagnostics; Plasma jets; Plasmas; Velocity; Plasma stability
Año:2009
Volumen:106
Número:5
DOI: http://dx.doi.org/10.1063/1.3213377
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_v106_n5_p_Prevosto.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v106_n5_p_Prevosto

Referencias:

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Citas:

---------- APA ----------
Prevosto, L., Kelly, H. & Mancinelli, B. (2009) . Determination of plasma velocity from light fluctuations in a cutting torch. Journal of Applied Physics, 106(5).
http://dx.doi.org/10.1063/1.3213377
---------- CHICAGO ----------
Prevosto, L., Kelly, H., Mancinelli, B. "Determination of plasma velocity from light fluctuations in a cutting torch" . Journal of Applied Physics 106, no. 5 (2009).
http://dx.doi.org/10.1063/1.3213377
---------- MLA ----------
Prevosto, L., Kelly, H., Mancinelli, B. "Determination of plasma velocity from light fluctuations in a cutting torch" . Journal of Applied Physics, vol. 106, no. 5, 2009.
http://dx.doi.org/10.1063/1.3213377
---------- VANCOUVER ----------
Prevosto, L., Kelly, H., Mancinelli, B. Determination of plasma velocity from light fluctuations in a cutting torch. J Appl Phys. 2009;106(5).
http://dx.doi.org/10.1063/1.3213377