Accession Number : AD0691022

Title :   COF2 RADIATION FROM AN ABLATING AIR-TEFLON BOUNDARY LAYER.

Descriptive Note : Research rept.,

Corporate Author : AVCO EVERETT RESEARCH LAB EVERETT MASS

Personal Author(s) : Young,Lee A. ; Greenberg,Robert A. ; Wray,Kurt L.

Report Date : JUN 1969

Pagination or Media Count : 33

Abstract : The infrared radiation from the boundary layer formed by the passage of arc-heated air over a Teflon surface has been measured over the 4-10 micrometer region. The results are compared to theoretical calculations based on a partial equilibrium boundary layer model which does not allow the formation of CF3 and CF4. The measurements confirm the theoretical prediction that COF2 will be the major radiator in this spectral region, and the calculated and measured absolute intensities are in very good agreement. Both theory and experiment show that the COF2 intensity is insensitive to the free-stream air temperature. The spectral contour of the 8 micrometer COF2 band in emission at temperatures near 2300K is presented. (Author)

Descriptors :   (*HALOCARBON PLASTICS, ABLATION), BOUNDARY LAYER, INFRARED SPECTROSCOPY, MOLECULAR SPECTROSCOPY, CARBON COMPOUNDS, OXYGEN COMPOUNDS, FLUORIDES

Subject Categories : Plastics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE