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Cathode-sheath model for field emission sustained atmospheric pressure discharges
(2021)
The cathode-sheath region of a discharge in atmospheric pressure air with a flat copper cathode is numerically investigated by using a simple
fluid model that takes into account non-local ionization. The effects of the ...
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 ...
Modelling of the Plasma–Sheath Boundary Region in Wall-Stabilized Arc Plasmas: Unipolar Discharge Properties.
(2017)
A two-dimensional model of the non-equilibrium unipolar discharge occurring
in the plasma–sheath boundary region of a transferred-arc was developed. This model was
used to study the current transfer to the nozzle (1 mm ...
Numerical investigation of the double-arcing phenomenon in a cutting arc torch.
(2014)
A numerical investigation of the double-arcing phenomenon in a cutting arc torch is reported.
The dynamics of the double-arcing were simulated by using a two-dimensional model of the gas
breakdown development in the ...
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 ...
Investigation of the relevant kinetic processes in the initial stage of a double-arcing instability in oxygen plasmas.
(2018)
A numerical investigation of the kinetic processes in the initial (nanosecond range) stage of the
double-arcing instability was developed. The plasma-sheath boundary region of an oxygen operated cutting torch was considered. ...