Accession Number : ADA307041

Title :   A Survey of Thermal Radiation Studies of Ablating Bodies in the Ballistic Range.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER

Personal Author(s) : Page, William A.

PDF Url : ADA307041

Report Date : FEB 1967

Pagination or Media Count : 22

Abstract : Ames Research Center has studied the radiative properties of the boundary layer and near wake of ablating bodies flying in ballistic ranges. The ablating materials investigated include polycarbonate, General Electric 12k resin, polyethylene, polyformaldehyde, Teflon, and cellulose nitrate. Both absolute radiometric and spectrographic data were obtained. The observed absolute amount of radiation varied greatly for the various materials. The chemical species responsible for the radiation in the spectral range from 0.2 to 1.1 microns were CN, C2, NH, H, and solid carbon microparticles, or soot. The results of the tests indicate a strong correlation between the radiating species present and the carbon-oxygen ratio of the ablating material.

Descriptors :   *ABLATION, *BOUNDARY LAYER, *WAKE, *THERMAL RADIATION, SOOT, SLENDER BODIES, HIGH TEMPERATURE, SHOCK WAVES, AIR FLOW, RADIATIVE TRANSFER, HIGH PRESSURE, FLOW FIELDS, TEMPERATURE GRADIENTS, MACH NUMBER, INFRARED RADIATION, FREE STREAM, BALLISTICS, RADIOMETRY, REYNOLDS NUMBER, THERMAL STRESSES, POLYCARBONATES, BLUNT BODIES, FORMALDEHYDE, SPECTROGRAPHY, HYPERSONIC FLOW, NITROCELLULOSE, POLYETHYLENE, TETRAFLUOROETHYLENE RESINS.

Subject Categories : Fluid Mechanics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE