Simultaneous measurements of energetic particles and ac electric fields made by the javelin sounding
NASA Technical Reports Server (NTRS)
A simple analytical model is developed to represent the transient behavior of high pressure electric arcs from the mass and energy conservation equations and Ohm's law. The analytical model is cast in a form that allows the arc terminal characteristics to be incorporated into modern electric circuit ...
Energy Citations Database
The physics of direct current and alternating current welding arcs, the heat transfer of direct current welding arcs, the characteristics of dc welding and ac welding power supplies and recommendations for the procurement and maintenance of precision power supplies are discussed. (LCL)
DOE Information Bridge
The performance of the power supply of the NOL 3 megawatt research arc is predicted by an analysis which represents the arc voltage as a square wave in a series circuit consisting of a voltage source, a limiting reactor, resistance of the substation, and ...
National Technical Information Service (NTIS)
The physics of direct current and alternating current welding arcs, the heat transfer of direct current welding arcs, the characteristics of dc welding and ac welding power supplies and recommendations for the procurement and maintenance of precision powe...
The interaction between diffuse vacuum arcs and magnetic fields applied transverse to the electrode axis has been investigated both theoretically and experimentally. For arc currents < 6 kA, Hall electric fields, generated by the interaction, bow the plasma out of contact with the anode and raise the arc ...
... Title : STABILIZATION OF ARC BURNING PROCESS (AC-ARC) AT ARGON-ARC WELDING OF STRUCTURAL STEEL,. ...
DTIC Science & Technology
Underwater electrical safety - shock risk from DC arc welding sets - the effect of AC components in the electrode voltage ERA Report (78-0007), Leatherhead, (1978), (ISBN 0 7008 0226 6>, 64pp price 30.00 (Project 2827)l/ERA Rept. In order to reduce the sh...
This work is devoted to the investigation of the discharge characteristics of an ac arc plasma torch with a well-type cathode working in air and CO2. The electrical characteristics, plasma jet image and optical emission profile are investigated by varying the discharge power and the gas flow rate. The dynamic behaviour of ...
NASA Astrophysics Data System (ADS)
A method of optimising the arc power in an ac electric arc furnace is given together with the main process parameters that must be monitored in order to achieve a symmetrical arc power input. A new configuration of oxy-fuel burners is described where move...
Examines the feasibility of using AC square wave power for multi-electrode submerged arc welding (SAW) by arranging 2 power sources for weld test using two-electrode submerged arc welding. Presents figures showing phase relationship between lead arc current and trail arc current for Scott ...
The results of laboratory and full-scale tests performed to reveal the factors that affect the appearance of a constant arc voltage component (CAVC) in an arc steel-melting furnace (ASF) and an ladle-furnace unit (LFU) are presented.
... PHYSICS), THERMAL PROPERTIES, ELECTRIC ARCS ... ELECTRICAL CONDUCTIVITY, THERMODYNAMICS ... CURRENT, NITROGEN, ARGON, ...
... AD0640728. Title : HIGH TEMPERATURE STABILIZED ELECTRIC ARCS OF HIGH POWER (ELECTRIC ARC PLASMOTRONS),. ...
The paper considers the electrical characteristics of an arc-mode slagging segmented Faraday generator studied with voltage probes, an ac resistance instrument, and a wide-view optical port. Cathode gap deterioration was observed during operation with the ac resistance instrument and correlated with the decrease in ...
Carbon arc electrical discharges struck across the surfaces of metals such as Nb-1 percent Zr, alter the morphology to produce a high thermal emittance surface. Metal from the surface and carbon from the arc electrode vaporize during arcing, and then condense on the metal surface to produce a microscopically rough ...
Carbon arc electrical discharges struck across the surfaces of metals such as Nb-1% Zr, alter the morphology to produce a high thermal emittance surface. Metal from the surface and carbon from the arc electrode vaporize during arcing, and then condense on the metal surface to produce a microscopically rough surface ...
Spectroscopic temperature determinations have been made on a thermal plasma generated by a fluid-stabilized arc. The electrodes of the arc were a rod anode and a plate cathode with the electrically neutral plasma being discharged through an orifice in the cathode. The arc was confined by means of a rotating ...
Arc black (AcB) was prepared in N2 gas using the twin-torch arc discharge apparatus, and a hollow capsule with graphite layers named a carbon nano balloon (CNB) was obtained by heat treatment of the AcB in Ar gas at 2400 �C. Transmission electron microscopy, Raman spectroscopy, thermogravimetric analysis, and ...
... Accession Number : ADD114225. Title : OPTIMIZATION OF PARAMETERS FOR TWO-WIRE AC-AC SUBMERGED ARC WELDING,. ...
is shown in Fig.2. The principle of electrodynamic arc movement in the field of self-current (rail gun (air) at atmospheric pressure. Fig. 16. Static VAC of three-phase plasma torch with rail gun electrodes of a single-chamber three-phase plasma with rail gun electrodes. Typical oscillograms of voltages at different
E-print Network
Advantages of the d-c furnace in comparison with the a-c system include: a major reduction in electrode consumption; lower power consumption; less flicker; and improved temperature and composition control. Of the four basic types of bottom electrode (anode) design, the fin-type system provides closer control of arc behavior. With a current maximum tapping ...
... Descriptors : *GASES, *HEATERS, *ELECTRIC ARCS, *GAS DYNAMICS, *ELECTRICAL PROPERTIES, TURBULENCE, THERMAL PROPERTIES ...
... Abstract : The dynamic behavior of electric arc discharge columns, which are ... analysis led to an explanation of 'magnetic arc pumping' which was ...
... Title : THE ELECTRICAL STABILITY OF HIGH CURRENT ARCS IN AIR AND IN CONTROLLED GASEOUS MIXTURES. ...
... Title : SURVEY OF INVESTIGATIONS OF ELECTRIC ARC INTERACTIONS WITH MAGNETIC AND AERODYNAMIC FIELDS. ...
... (Author). Descriptors : (*ELECTRIC ARCS, *HEAT TRANSFER), THERMAL RADIATION, TRANSPORT PROPERTIES, PARTIAL DIFFERENTIAL ...
... Accession Number : AD0265666. Title : PECULIARITIES OF THE COMBUSTION OF THE ELECTRIC ARC IN VACUUM ARC FURNACES. ...
... of the heater are determined. ... Descriptors : (*HEATERS, ELECTRIC ARCS), ELECTRODES ... Subject Categories : AIR CONDITION, HEATING ...
... (Author). Descriptors : *DAMAGE ASSESSMENT, *SEMICONDUCTORS, *ELECTRIC CONDUCTORS, *ELECTRIC ARCS, METALS, THESES ...
...connected to input circuits shall be completely...from accidental electrical contact by personnel...other equivalent electrical and mechanical...connected to an a.c. circuit of higher than...Conduits containing electrical conductors shall...completing a work-lead circuit. Pipelines...
Code of Federal Regulations, 2011
... Accession Number : AD0655046. Title : DETERMINING THE ELECTRIC PARAMETERS OF AC CONDUCTORS FOR AIRCRAFT,. ...
... Accession Number : AD0666432. Title : CHARACTERISTICS OF A HIGH PRESSURE AC ARC HEATER SYSTEM. Descriptive Note : Rept. no. ...
... Title : THE EFFECT OF ALTITUDE ON ARC LENGTH IN 200 VOLT AC AND DC SYSTEMS. Descriptive Note : Technical rept.,. ...
... National Defense Industrial Association Conference Proceedings. ... in an electric arc furnace. ... ELECTRIC ARCS, ELECTRIC FURNACES, EMISSION ...
... or 'normal' flow arc heater the problem of ... Descriptors : *ARC HEATERS, PRESSURE, NOZZLES ... Subject Categories : AIR CONDITION, HEATING ...
... National Defense Industrial Association Conference Proceedings. ... of Titanium in an Arc Furnace. ... Arc melting, Electric furnaces, Industrial production ...
... high energy pulsed arc discharge has been ... arc to be of homogeneous temperature of ... MODELS, ELECTRIC DISCHARGES, ELECTRON DENSITY ...
... ZN ALLOY MATERIAL INTO AN AC ARC DISCHARGE AND CONCENTRATION DEPENDENCE OF THE INTENSITY OF ALUMINIUM AND ZINC ...
Operation of an a-c electric arc furnace load is associated with the generation of harmonic currents in the frequency range of fractions of Hertz up to approximately 1,000 Hz. The magnitude of these harmonic current components can be high and depends on the diverse operating condition of the system. Exposure of the furnace yard ...
... Descriptors : (*SIGNAL LIGHTS, ELECTRIC ARCS), (*XENON LAMPS, SIGNAL LIGHTS), OPTICAL COMMUNICATIONS, COMMUNICATION ...
Language: English ...
NBII National Biological Information Infrastructure
... Descriptors : *MAGNETOHYDRODYNAMIC GENERATORS, ELECTRIC ARCS, HALL EFFECT, VOLTAGE, ELECTRODES, TUNGSTEN ...
The results of modernizing one of the DSV-3.2-G1 arc furnaces at OAO Elektrostal� Metallurgical Works are presented. New automatic control system ACS DSV-3.2 with functions of maintenance, control, and correction of the main technical parameters of vacuum arc remelting is created. The electric furnace is equipped ...
A survey is given of the behaviour of arc anodes which are operated under conditions being existent in high intensity discharge lamps. Experimental investigations are mainly performed at a special model lamp. They comprise optical observations of the anodic arc attachment, spatially resolved pyrometric measurements of the electrode temperature, ...
... POWER PRODUCTION, *THERMOELECTRICITY, DESIGN, ELECTRIC ARCS, ELECTRIC DISCHARGES, ELECTRIC POTENTIAL, LIFE ...
