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Browse Journals & Magazines > Plasma Science, IEEE Transact ...> Volume:18 Issue:1 Help

Nature of convection-stabilized DC arcs in dual-flow nozzle geometry. I. The cold flow field and DC arc characteristics

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2 Author(s)
Serbetci, I. ; Dept. of Mech. Eng., Rensselaer Polytech. Inst., Troy, NY, USA ; Nagamatsu, H.T.

An experimental investigation of the steady-state low current air arcs in a dual-flow nozzle system is presented. The cold flow field with no arc was determined for various nozzle geometries, i.e. two- and three-dimensional and orifice nozzles, and nozzle pressure ratios. Supersonic flow separation and oblique and detached shock waves were observed in the flow field. Using a finite-element computer program, the Mach number contours were determined in the flow field for various nozzle-gap spacings and pressure ratios. In addition, the DC arc voltage and current measurements were made for an electrode gap spacing of ≈5.5 cm and current levels of I≈25, 50, and 100 A for the three nozzle geometries. The arc voltage and arc power increased rapidly as the flow speed increased from zero to sonic velocity at the nozzle throat. The shock waves in the converging-diverging nozzles resulted in a decrease in the overall resistance by about 15%

Published in:
Plasma Science, IEEE Transactions on  (Volume:18 ,  Issue: 1 )

Date of Publication: Feb 1990

Page(s):
91 - 101
ISSN :
0093-3813
INSPEC Accession Number:
3618837
Digital Object Identifier :
10.1109/27.45511
Product Type:
Journals & Magazines
Date of Current Version :
06 August 2002
Issue Date :
Feb 1990
Sponsored by :
IEEE Nuclear and Plasma Sciences Society

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