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from Brown Corpus
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The third method was, to our knowledge, successfully applied for the first time by C. Sheer and co-workers ( Ref. 2 ).
The purpose of the present study is to study the thermal conditions and to establish an energy balance for a transpiration cooled anode as well as the effect of blowing on the arc voltage.
Gas injection through a porous anode ( transpiration cooling ) not only feeds back the energy transferred to the anode by the above mentioned processes, but also modifies the conditions in the arc itself.
A detailed study of this latter phenomenon was not attempted in this paper.
Argon was used as a blowing gas to exclude any effects of dissociation or chemical reaction.
The anode material was porous graphite.
Sintered porous metals should be usable in principle.
However, technical difficulties arise by melting at local hot spots.
The experimental arrangement as described below is based on the geometry of free burning arcs.
Thus, direct comparisons can be drawn with free burning arcs which have been studied in detail during the past years and decades by numerous investigators ( Ref. 3 ).

1.799 seconds.