Listar FRVT - Producción Científica por fecha de publicación
Mostrando ítems 1-20 de 111
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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 ... -
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 ... -
Granulometría y Mineraloga de vertisoles. Planicie costera del Río de la Plata.
(2007)La llanura costera del nordeste bonaerense constituye uno de los ambientes generados en la etapa evolutiva más reciente del Río de La Plata, entre la última glaciación de finales del Pleistoceno y la transgresión Holocena. ... -
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 ... -
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 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 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 ... -
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 ... -
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 ... -
On the Double-Arcing Phenomenon in a Cutting Arc Torch.
(2011)Transferred arc plasma torches are widely used in industrial cutting process of metallic materials because of their ability to cut almost any metal and the very high productivity that can be achieved with this technology ... -
On the use of the Prandtl mixing length model in the cutting torch modeling.
(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 ... -
Correlation methods in cutting arcs
(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 ... -
Comportamiento de uniones tipo clavija con pernos deformables en madera de Araucaria angustifolia.
(2011-06-07)El proceso de discusión pública del Reglamento para el Cálculo de Estructuras de Madera en Argentina genera el momento propicio para impulsar el desarrollo de trabajos de caracterización de especies y comportamiento ... -
Caracterización del híbrido Pinus elliottii var. elliottii x Pinus caribaea var. hondurensis “F2” para su utilización en vigas laminadas encoladas.
(UTN FRVT, 2011-06-09)El objetivo es caracterizar el Híbrido Pinus elliottii var. elliottii x Pinus caribaea var. hondurensis implantado en la Provincia de Misiones, Argentina y evaluar su utilización en vigas de madera laminada encolada. ... -
On the dynamic behavior of the anode–arc–root at the nozzle surface in a non-transferred plasma torch
(2012)The dynamic behavior of the anode–arc–root at the nozzle surface of a plasma torch was experimentally investigated in this work. A gas (N2) vortex–stabilized non–transferred arc torch with a thoriated tungsten rod (2wt ...