Accession Number : ADA307210

Title :   Analytical Determination of the Effect of Thermal Property Variations on the Performance of a Charring Ablator.

Descriptive Note : Technical note,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION HAMPTON VA LANGLEY RESEARCH CEN TER

Personal Author(s) : Pittman, Claud M. ; Brewer, William D.

PDF Url : ADA307210

Report Date : JUL 1966

Pagination or Media Count : 31

Abstract : An analytical investigation of the effects of varying certain material properties on the performance of a charring ablator material has been made. The quantities which are varied are char conductivity, conductivity and specific heat of the uncharred material, heat of pyrolysis, temperature of pyrolysis, and the specific heat of the gases of pyrolysis. The effects of these variations on surface recession, charred-uncharred interface recession, and internal temperature histories are shown. The analytical results are compared with experimental results and representative material property values are found which provide good agreement.

Descriptors :   *THERMAL PROPERTIES, *REENTRY VEHICLES, VELOCITY, ABLATION, THERMAL CONDUCTIVITY, AERODYNAMIC HEATING, SPECIFIC HEAT, PYROLYSIS, THERMAL RESISTANCE, ABLATIVE MATERIALS, CHARRING.

Subject Categories : Thermodynamics
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE