Abstract
Free burning arcs, where the work piece acts as an anode, are frequently used for a number of applications. Our investigation is exclusively concerned with a simplified unified model of arcs and their electrodes under steady state conditions at atmospheric pressure. The model is used to make predictions of arc and electrode temperatures and arc voltage for a 200 A arc in argon. The computed temperatures along the axis between the cathode tip and the anode surface compare well the measured data.
Highlights
High pressure arcs have been used for cutting, welding, spraying, coating, material heating and melting, lighting, current interruption, and, more recently, for waste disposal, production of fine particles, and thermal plasma vapor deposition [7, 10]
There are two types of DC arc torches, transferred arc and non-transferred arc, by the configuration of electrodes. It has been studying on high-power DC arc torches for transferred arc because the arc energy is directly deposited on the treated materials acting as anode with high heat transfer efficiency in free burning arc plasma systems [2]
Local thermodynamic equilibrium (LTE) usually holds, and computer simulation based on local thermodynamic equilibrium (LTE) can usually predict satisfactorily the bulk properties of the arc plasma
Summary
High pressure arcs ( known as thermal plasmas) have been used for cutting, welding, spraying, coating, material heating and melting, lighting, current interruption, and, more recently, for waste disposal, production of fine particles, and thermal plasma vapor deposition [7, 10]. There are two types of DC arc torches, transferred arc and non-transferred arc, by the configuration of electrodes It has been studying on high-power DC arc torches for transferred arc ( known as free burning arc) because the arc energy is directly deposited on the treated materials acting as anode with high heat transfer efficiency in free burning arc plasma systems [2]. The very frequent collisions between particles of different species within the arc ensure the attainment of a single temperature for all species. For such a plasma, local thermodynamic equilibrium (LTE) usually holds, and computer simulation based on LTE can usually predict satisfactorily the bulk properties (i.e. the arc column) of the arc plasma. The quality and the efficiency of a process depend on the energy flux going into the work piece which acts as anode
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
