Abstract

Experimental results for an axial arc column in the steady flow behind the shock front in a shock tube are presented. Tests were made at currents between 5 A and 150 A for free-stream Mach numbers of 0·4, 0·7, 1·0 and 1·3 in nitrogen gas at a pressure of one atmosphere. A semi-empirical heat transfer theory is proposed and an excellent correlation of the voltage gradient to current data is found.

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