Original scientific paper
The time dependence of the velocity of rotating arc motion
V. J. Georgijević
; Institute of Physics, Beograd
M. S. Todorović
; Institute of Physics, Beograd
M. Zlatanović
; Institute of Physics, Beograd
Abstract
Experimental investigations have shown that the velocity of rotating arc changes with time, and that this variation may affect considerably the properties of the rotationg arc as a spectrochemical source. In the present work theoretical relations are derived describing qualitatively the time dependence of the arc motion velocity, and a comparison is made with experimental data. It was found that the rise time to a steady arc motion depends essentially on the anode temperature and that it is of the order of magnitude of the rise time to reach stationary temperature field in the anode. The effect of individual parameters on the duration of the transient time has been investigated and a possibility of reducing the rise time to the steady state is pointed out. The results obtained suggest an explanation of the nature of friction force between the anode spot and the anode in the case where the arc is driven by electrodynamic forces. All the measurements were performed with a free burning electric arc between graphite electrodes at atmospheric pressure.
Keywords
Hrčak ID:
322940
URI
Publication date:
6.1.1976.
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