Listar FRVT - Producción Científica por título
Mostrando ítems 65-84 de 94
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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 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 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 Gas Heating Mechanism for the Fast Anode Arc Reattachment in a Non-transferred Arc Plasma Torch Operating with Nitrogen Gas in the Restrike Mode.
(2015)The present work provides a detailed kinetic analysis of the time-resolved dynamics of the gas heating during the arc reattachment in nitrogen gas in order to understand the main processes leading to such a fast reattachment. ... -
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 ... -
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 ... -
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 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 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 the double floating probe method to infer the difference between the electron and the heavy particles temperatures in an atmospheric pressure, vortexstabilized nitrogen plasma jet.
(2014)Sweeping double probe measurements in an atmospheric pressure direct current vortex-stabilized plasma jet are reported (plasma conditions: 100 A discharge current, N2 gas flow rate of 25 Nl/min, thoriated tungsten rod-type ... -
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 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 ... -
El pellet de marlo como vector energético.
(UTN FRVT, 2018-10-19)El presente trabajo detalla la utilización del pellet de marlo como vector energético. Se sabe que el marlo es un buen combustible pero su bajo peso específico hace que su traslado sea poco rentable, por lo que para ... -
Plasma Cutting of Concrete: Heat Propagation and Molten Material Removal From the Kerf.
(2019)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 ... -
Potenciar uso estructural de la madera Populus deltoides cultivado en el noroeste de la provincia de Buenos Aires.
(2017-05-17)La madera proveniente de bosques implantados constituye una alternativa de suma importancia en la construcción de edificios y la poca información disponible sobre el comportamiento estructural de las distintas combinaciones ... -
Preservación de madera con protectores de bajo impacto ambiental
(UTN FRVT, 2016-11-02)La madera es un material que proviene de un mecanismo biológico, con células que se han desarrollado mediante un sistema que obedece a las normas básicas de reproducción y crecimiento de los seres vivos. Resulta vulnerable ... -
Propiedades estructurales de la madera de Araucaria angustifolia proveniente de bosques implantados.
(2012-09-19)En Argentina se prioriza la formación de los estudiantes de ingeniería en el conocimiento de estructuras de acero y hormigón. La madera aparece postergada en este planteo, desconociendo que es una alternativa ventajosa en ... -
Puesta en valor del Pino Ponderosa para uso en estructuras de madera.
(UTN FRVT, 2018-10-24)El Primer Reglamento Argentino de Estructuras de Madera, CIRSOC 601 (2016), en sus suplementos contempla los valores de las propiedades estructurales de madera de solo cuatro especies: Pinus ... -
Quantitative Schlieren Diagnostic Applied to a Nitrogen Thermal Plasma Jet.
(2018)— A quantitative interpretation of the schlieren technique applied to an atmospheric pressure, vortex-stabilized nitrogen thermal plasma jet generated in a direct-current nontransferred arc plasma torch (nitrogen gas ... -
Relación entre el módulo de elasticidad global y local de elementos estructurales de Populus Deltoides Australiano 129/60 y Stoneville 67 cultivados en Argentina.
(2021-04)En este trabajo se compara el valor del módulo de elasticidad local obtenido experimentalmente, con el determinado teóricamente de acuerdo a tres criterios reconocidos internacionalmente (UNE-EN 384 2016, INTI-SIRSOC 2016 ...