Accession Number : AD0736931

Title :   Radiation Heat Transfer in Ceramic Re-Entry Heat Shields.

Descriptive Note : Research rept.,

Corporate Author : GRUMMAN AEROSPACE CORP BETHPAGE N Y RESEARCH DEPT

Personal Author(s) : Reichman,Joseph

Report Date : 01 JAN 1972

Pagination or Media Count : 40

Abstract : The material parameters commonly used, those of emissivity and the radiative component of thermal conductivity, are examined to determine their validity in characterizing the heat transfer processes in a radiative re-entry heat shield. This is done by comparing calculations of radiative heat fluxes and temperature distributions of two models. The first one uses the standard heat conduction equation employing the above parameters, while the second is based on more exact radiative transfer theory that uses the radiation parameters of the absorption and scattering coefficients. Results of these calculations indicate that for typical aerodynamic heat fluxes calculated temperature distributions for the two models varied significantly, particularly near the surface. (Author)

Descriptors :   (*CERAMIC MATERIALS, HEAT TRANSFER), (*REENTRY VEHICLES, *HEAT SHIELDS), AERODYNAMIC HEATING, HEAT FLUX, NOSE CONES, THERMAL RADIATION, EMISSIVITY, CONDUCTION(HEAT TRANSFER), THERMAL CONDUCTIVITY, MATHEMATICAL MODELS

Subject Categories : Ceramics, Refractories and Glass
      Guided Missile Reentry Vehicles
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE