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Anode Heat Transfer in a DC Electric ARC with Superimposed Axial Flow

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2 Author(s)
Paulson, R.F. ; ARL, Plasma Physics Research Lab. Wright-Patterson Air Force Base Dayton, Ohio ; Pfender, E.

A DC electric arc is operated in argon at pressures between 100 and 760 mm Hg, axial flow velocities from 0 to 100 m/sec, and currents from 50 to 200 amps to assess the influence of these parameters on anode heat transfer using a double-anode configuration consisting of two plane, parallel anodes. Since the anode arc attachment size is appreciably smaller than the anode surface area in these experiments, a method is developed using an optical and/or floating potential probes for measuring the size of the near-anode arc column. The relative variation of two perpendicular dimensions of the near-anode arc column for variation in the arc operating parameters (pressure, flow velocity, current, anode separation) are measured. The results reveal that the cross section of the nearanode column is not circular and the average local heat fluxes show a strong dependence on the gas pressure.

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Plasma Science, IEEE Transactions on  (Volume:1 ,  Issue: 3 )