Buscar
Mostrando ítems 1-10 de 32
Enhancement of soybean nodulation by seed treatment with non–thermal plasmas
(2020-03-18)
Soybean (Glycine max (L.) Merrill) is one of the most important crops worldwide providing dietary
protein and vegetable oil. Most of the nitrogen required by the crop is supplied through biological
N2 fxation. Non-thermal ...
Numerical Modelling of a Cutting Arc Torch
(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 ...
Langmuir probe diagnostics of an atmospheric pressure, vortex–stabilized nitrogen plasma jet
(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 ...
On the dynamics of cutting arc plasmas: the role of the power supply ripple
(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
(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 ...
Langmuir probe measurements in a time-fluctuating-highly ionized non-equilibrium cutting arc: Analysis of the electron retarding part of the time-averaged current-voltage characteristic of the probe.
(2013)
This work describes the application of Langmuir probe diagnostics to the measurement of the electron
temperature in a time-fluctuating-highly ionized, non-equilibrium cutting arc. The electron retarding
part of the ...
Departures from local thermodynamic equilibrium in cutting arc plasmas derived from electron and gas density measurements using a twowavelength quantitative Schlieren technique.
(2011)
A two-wavelength quantitative Schlieren technique that allows inferring the electron and gas
densities of axisymmetric arc plasmas without imposing any assumption regarding statistical
equilibrium models is reported. ...
On the dynamics of the space-charge layer inside the nozzle of a cutting torch and its relation with the “non-destructive” double-arcing phenomenon
(2011)
Experimental observations on the plasma dynamics inside the nozzle of a 30 A oxygen cutting torch
operated at conditions close to the double arcing are reported. It is employed a technique previously
developed in our ...
Schlieren technique applied to the arc temperature measurement in a high energy density cutting torch.
(2010)
Plasma temperature and radial density profiles of the plasma species in a high energy density cutting
arc have been obtained by using a quantitative schlieren technique. A Z-type two-mirror schlieren
system was used in ...
Modelling of an Atmospheric–Pressure Air Glow Discharge Operating in High–Gas Temperature Regimes: The Role of the Associative Ionization Reactions Involving Excited Atoms.
(2020)
A model of a stationary glow-type discharge in atmospheric-pressure air operated in
high-gas-temperature regimes (1000 K < Tg < 6000 K), with a focus on the role of associative ionization
reactions involving N(2D,2P)-excited ...