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Measurements of the current-zero behaviour of constant-pressure axial-flow electric arcs in nitrogen

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1 Author(s)
Topham, D.R. ; University of Oxford, Department of Engineering Science, Oxford, UK

It is shown that the equations for the arc in constant-pressure axial flow can be described in terms of nondimensional variables that account for the effects of changes in the gas-flow velocity, pressure, arc length and circuit-element values. Experiments in nitrogen confirm the predicted scaling laws for arcs with an impressed linear current wave, as well as arcs for which an added parallel capacitance causes a strong arccircuit interaction. Sinusoidal current waves up to 150 A peak were used at flow velocities up to 300 m/s and pressures up to 2.5 atm.

Published in:

Electrical Engineers, Proceedings of the Institution of  (Volume:120 ,  Issue: 12 )