Effect of the temperature dependence of optical properties of materials on their radiant heating
Abstract
The radiant heating of materials is analyzed using Goodman's integral method with allowance for the temperature dependences of the absorptance and the absorption coefficient. The time lags of the surface temperature during sudden changes in the absorptance is derived for cases of two and three-dimensional sources. Also examined is the effect of phase transitions (melting or vaporization) on the derived equations. These equations can be utilized for analyzing the thermal effect of radiation on semiconductors and metals with sudden changes of optical properties, and for determining the optimum mode of vaporization in which a total pulse energy induces the greatest travel of the vaporization front.
- Publication:
-
NASA STI/Recon Technical Report A
- Pub Date:
- February 1982
- Bibcode:
- 1982STIA...8324012G
- Keywords:
-
- Absorptance;
- Absorptivity;
- Metal Surfaces;
- Radiant Heating;
- Semiconductors (Materials);
- Temperature Dependence;
- Surface Temperature;
- Vaporizing;
- Fluid Mechanics and Heat Transfer