Accession Number : AD0284803

Title :   MEASUREMENTS OF TOTAL ENERGY RADIATED FROM AN ARGON ARCJET

Corporate Author : PRINCETON UNIV NJ

Personal Author(s) : JACOBS, PAUL F.

Report Date : AUG 1962

Pagination or Media Count : 1

Abstract : The total energy radiation of an argon arcjet was measured by a simple collimated thermopile. Radiation from the luminous jet was found to vary as T to the 7.2 power when the peak (centerline) temperature at the arcjet exit plane was 23,000 R. Total radiated energy from the arcjet, including the downstream-directed component from the cathode face, was found to be less than 0.8% of the net jet power under these conditions. This rather low level was traced to the small 'visibility' of the hot cathode face, which was observed to radiate over 300 times more intensely than the luminous jet itself. The use of a purified helium atmosphere and lithium fluoride optical components permitted achievement of transmissivity down to 1060 angstroms on all measurements. (Author)

Descriptors :   *ARGON, *ENERGY, *GASES, *HEAT TRANSFER, THERMOCOUPLES.

Distribution Statement : APPROVED FOR PUBLIC RELEASE