Abstract
Theoretical estimations of the voltage gradient are reported for cylindrical, wall-stabilized arcs established in highly pressurized SF6 gas. The calculations are performed numerically without using a heat flux potential or any other analytical approximations. Numerical data of the electrical and thermal conductivities are stored in a computer memory, and those values are processed through lagrangian interpolation. The SF6 gas pressures are 1, 4 and 16 atm; the axial temperatures of the arc columns are in the range 7000-40 000 K; and the stabilized bore diameters are 0·2, 0·4, 0·5 and 0·8 cm. The calculated results are compared with experimental measurements and other theoretical results, and the proposed calculations are found to be closer to the experimental results for the wide range of magnitude of the arc current.
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