Accession Number : ADA193133

Title :   Radiative Heat Transfer and Selective Emission in Planar Slab Coatings on Hot Emissive Substrates.

Descriptive Note : Final rept. Oct 85-Mar 87,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : LaFemina, John A ; Ladouceur, Harold D

PDF Url : ADA193133

Report Date : 31 Dec 1987

Pagination or Media Count : 24

Abstract : The spectral radiance of infrared radiation emitted from a smooth planar coating in thermal contact with a hot substrate is analyzed by radiative transport theory. The solution of the radiative transfer equation, which governs the spectral radiance within the coating, is used to determine whether selective (nonblackbody) emitter coatings in infrared banded regions can be obtained in the limiting cases of optically thin or thick regimes. For the reader not interested in the mathematical details of this report, the key conclusions are given following Eq. (22). The results are presented in a summary that shows how varying the optical thickness of the coating, the coating material, and the substrate parameters affect the emitted radiation. Keywords: Radiative transport; Selective emission; Infrared materials.

Descriptors :   *COATINGS, *HEAT TRANSFER, *MATERIALS, *RADIATIVE TRANSFER, *SUBSTRATES, EMITTERS, EQUATIONS, HIGH TEMPERATURE, INFRARED OPTICAL MATERIALS, INFRARED RADIATION, LIMITATIONS, OPTICAL PROPERTIES, PARAMETERS, PLANAR STRUCTURES, RADIANCE, RADIATION, SPECTRA, THERMAL PROPERTIES, THICKNESS, THINNESS, TRANSPORT, TRANSPORT PROPERTIES

Subject Categories : Coatings, Colorants and Finishes
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE