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Experimental Characterization of a Low-Current Cutting Torch.
(2004)
An experimental characterization of a low-current (30-40 A) cutting torch is presented. To avoid contamination
of the plasma arc by removed anode material, a rotating steel cylinder was used as the anode and the arc ...
On the space-charge boundary layer inside the nozzle of a cutting torch.
(2009)
A numerical study of the space-charge sheath adjacent to the nozzle wall of a cutting torch is
presented. The hydrodynamic model corresponds to a collision-dominated sheath and does not
assume cold ions, so drift-diffusion-type ...
On the physical origin of the nozzle characteristic and its connection with the double-arcing phenomenon in a cutting torch.
(2009)
The nozzle current-voltage characteristic for a cutting arc is presented in this work. The
measurements are reported using a high energy density cutting arc torch with a nozzle bore radius
of 0.5 mm. The arc current was ...
An Interpretation of Langmuir Probe Floating Voltage Signals in a Cutting Arc.
(2009)
An experimental study of the electrostatic probe
floating voltage signals in a cutting arc and its physical interpre tation in terms of the arc plasma structure is reported. Sweeping
electrostatic probes have been used ...
On the use of the metallic nozzle of a cutting arc torch as a Langmuir probe.
(2008)
The region inside the nozzle (bore diameter ≈1 mm) of a cutting arc torch is inaccessible to
most plasma diagnostics, and numerical simulations are the only means to find out the relative
importance of several physical ...
On the Use of Sweeping Langmuir Probes in Cutting-Arc Plasmas—Part II: Interpretation of the Results.
(2008)
A semiempirical Langmuir probe model is intro duced that is particularly adapted to high-energy-density cutting
arcs, for which, as we have shown in Part I, the ion current
collected by negatively biased probes shows no ...
Hydrodynamic Model for the Plasma-Gas Flow in a Cutting Torch Nozzle.
(2004)
We present a simple hydrodynamic model to obtain the profiles of the relevant physical quantities along a nozzle
of arbitrary cross-section in a cutting torch. The model uses a two-zone approximation (a hot central ...
On the Use of Sweeping Langmuir Probes in Cutting Arc Plasmas—Part I: Experimental Results.
(2008)
The first study of Langmuir probes applied to cut ting arcs using a sweeping-probe system is presented. It is found
that, under a relatively broad range of experimental conditions
(changes in the probe material, in the ...
On the influence of the nozzle length on the arc properties in a cutting torch
(2009)
In this work, an experimental study on the influence of the nozzle geometry on the
physical properties of a cutting arc is reported. Ion current signals collected by an electrostatic
probe sweeping across a 30 A oxygen ...