• Correlation methods in cutting arcs 

    Prevosto, Leandro; Kelly, Héctor (IOPscience, 2011-05-25)
    The present work applies similarity theory to the plasma emanating from transferred arc, gas-vortex stabilized plasma cutting torches, to analyze the existing correlation between the arc temperature and the physical ...
  • Langmuir probe diagnostics of an atmospheric pressure, vortex–stabilized nitrogen plasma jet 

    Prevosto, Leandro; Kelly, Héctor; Mancinelli, Beatriz (2012-09-19)
    Langmuir probe measurements in an atmospheric pressure direct current (dc) plasma jet are reported. Sweeping probes were used. The experiment was carried out using a dc non–transferred arc torch with a rod–type cathode ...
  • Numerical Modelling of a Cutting Arc Torch 

    Mancinelli, Beatriz; Minotti, Fernando O.; Prevosto, Leandro; Kelly, Héctor (Jan Awrejcewicz. INTECH, 2014-02-14)
    Plasma cutting is a process of metal cutting at atmospheric pressure by an arc plasma jet, where a transferred arc is generated between a cathode and a work-piece (the metal to be cut) acting as the anode . Small nozzle ...
  • On the dynamics of cutting arc plasmas: the role of the power supply ripple 

    Prevosto, Leandro; Mancinelli, Beatriz; Kelly, Héctor (ADVANCED ELECTROMAGNETICS, 2012-08)
    The power sources used in cutting arc torches are usually poorly stabilized and have a large ripple factor. The strong oscillatory components in the voltage and arc current produce in turn, large fluctuations in the plasma ...
  • On the physical processes ruling an atmospheric pressure air glow discharge operating in an intermediate current regime 

    Prevosto, Leandro; Kelly, Héctor; Mancinelli, Beatriz; Chamorro, J.C; Cejas, Ezequiel (2015-02-06)
    Low-frequency (100 Hz), intermediate-current (50 to 200 mA) glow discharges were experimentally investigated in atmospheric pressure air between blunt copper electrodes. Voltage–current characteristics and images of the ...
  • On the use of the Prandtl mixing length model in the cutting torch modeling. 

    Mancinelli, Beatriz; Minotti, Fernando O.; Kelly, Héctor (2011-05-25)
    The Prandtl mixing length model has been used to take into account the turbulent effects in a 30 A high-energy density cutting torch model. In particular, the model requires the introduction of only one adjustable coefficient ...