RADIATION HEAT FLUX FROM HIGH PRESSURE ARCS
GENERAL ELECTRIC CO PHILADELPHIA PA MISSILE AND SPACE DIV
Pagination or Media Count:
An ablation type constrictor was developed in which an electric arc at very high pressure is sufficiently stable for spectrographic measurements. Radial temperature distributions were determined for 250 ampere arcs in Delrin, COH2n, plasma at 100 and 150 atmospheres. Voltage gradient is constant along the arc axis and as high as 500 voltscm. Pressure gradient in the constrictor is negligible. These two results indicate strongly that in spite of the self- induced flow field, the ablation type arc is homogeneous along the column. Temperature measurement was based on non-optically thin Abel inversion of continuum intensity measurements useful to an optical depth of one or more, which related temperature to theoretically computed continuum emission. A previously developed arc radiation model was extended to include a few selected lines, and these contribute significantly to total radiation because they are very much broadened.
- Electricity and Magnetism
- Plasma Physics and Magnetohydrodynamics