Radiative transfer in SF₆and SF₆-Cu arcs

Abstract

The radiative transfer in SF6 and SF6-Cu arcs was calculated using the method of partial characteristics. The partial sources and sinks of radiation were tabulated for a temperature range 300-30 000 K and a pressure range 0.1-1 MPa. The method was applied to one- and three-dimensional calculations of radiative transfer and in arc plasma models. In circuit breakers, radiation absorption increases the upstream pressure either by direct heating or by accentuating the clogging effect in the nozzle throat.

Influence of metal vapours on radiation characteristics of air arc plasmas

“…On the other hand, the absorption of radiation in the cold regions at the edge of the arc is almost independent of the metal concentration when this concentration remains low (up to 10 %). Our results are similar to those of [14,19]. It should be noted that the results for silver are probably underestimated.…”

The effects of metal vapour in arc welding

“…The method of partial characteristics has particular advantages in modelling of arcs such as in circuit breakers, where quantifying the absorption as well as the emission of radiation is important. Calculations of the required functions for mixtures of sulphur hexafluoride and copper vapour have been presented by Raynal et al [135]. However, for gas mixtures relevant to welding arcs, net emission coefficient data appear far more frequently in the literature.…”

Improvements of radiative transfer calculation for SF6 thermal plasmas

“…For SF 6 the Som and ΔSim terms have been computed by Aubrecht and Lowke [10] and by Raynal et al [6;11].…”