Theoretical estimation on the emittance of the thermal, control coating materials
Abstract
The hemispherical emittance of the thermal-control material is one of the most important parameters for the thermal design of spacecraft. This paper is focused in the theoretical estimation of this value for painted layers, in which basic parameters such as the pigment size, the optical constants of pigment and vehicle, and the reflectivity of substrate are considered. The radiative-transfer equation developed by Chandrasekhar (1960) to solve scattering problems in outer space is applied. Using this theory, the spectral hemispherical emittance of painted layers with the parameters layer thickness and pigment volume concentration are calculated.
- Publication:
-
14th Space Technology and Science Symposium
- Pub Date:
- 1984
- Bibcode:
- 1984spte.symp..557H
- Keywords:
-
- Emittance;
- Paints;
- Thermal Control Coatings;
- Thermal Protection;
- Mie Scattering;
- Pigments;
- Protective Coatings;
- Radiative Transfer;
- Spacecraft Design;
- Fluid Mechanics and Heat Transfer