Journal of Engineering Physics and Thermophysics
is a translation of Inzhenerno-fizicheskii Zhurnal,
a publication of the Academic Scientific Complex
"A. V. Luikov Heat and Mass Transfer Institute"
of the National Academy of Sciences of Belarus
Address of the Editorial Office and
the Publisher
HEAT TRANSFER AND PLASMATRON ELECTRODE EROSION
A. Marotta , L. I. Sharakhovsky , and
V. N. Borisyuk
UDC 621.387.143.014.31
A simple thermophysical model is proposed for cold
electrode erosion in electric-arc heaters. The model
regards erosion as characterized by an effective
enthalpy for the change of state of the electrode
material in the arc spot from solid to plasma. We
show that the erosion problem can be represented by
a system of three one-dimensional equations. The
total heat flux in the arc spot can be represented
by the electrode voltage drop. A magnetically driven
arc rotating between copper ring electrodes was used
for the experiments. The present model enables us to
reveal the relative significance of the different
parameters in the erosion process and to predict the
erosion behavior in cold-electrode electric-arc
heaters over a wide range of parameters.
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