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Determination of plasma velocity from light fluctuations in a cutting torch
(American Institute of Physics, 2009-11)
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 ...
Correlation methods in cutting arcs
(IOPscience, 2017)
Numerical Modelling of a Cutting Arc Torch
(Jan Awrejcewicz. INTECH, 2017)
Plasma cutting of concrete: Heat propagation and molten material removal from the kerf
(Institute of Electrical and Electronics Engineers, 2019-05)
An experimental investigation of heat propagation in the case of plasma cutting of concrete is reported. The experiments were carried out by using a high-enthalpy nitrogen plasma jet generated in a dc vortex-stabilized ...
On the physical origin of the nozzle characteristic and its connection with the double-arcing phenomenon in a cutting torch
(American Institute of Physics, 2009-12)
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
(Institute of Electrical and Electronics Engineers, 2009-12)
An experimental study of the electrostatic probe floating voltage signals in a cutting arc and its physical interpretation in terms of the arc plasma structure is reported. Sweeping electrostatic probes have been used to ...
On the space-charge boundary layer inside the nozzle of a cutting torch
(American Institute of Physics, 2009-12)
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 ...
Automação da altura da tocha de plasma, em processos de corte metalúrgico
(Universidade Tecnológica Federal do ParanáPonta GrossaBrasilDepartamento Acadêmico de EletrônicaTecnologia em Automação IndustrialUTFPR, 2014-02-28)
A conventional cutting plasma equipment was having problems due to the torch height during the cutting process, from the imperfections of the plates, causing wear consumables thus decreasing the useful life and causing ...
Numerical modeling of the gas breakdown development in the space–charge layer inside the nozzle of a transferred arc torch
(IOP Publishing, 2012-06)
Double–arcing is a phenomenon that occurs when a transferred arc, flowing inside an electrically insulated nozzle, breaks into two separate arcs: one that connects the cathode with the nozzle, and another that connects the ...