Radiative and molecular heat transfer in high-vacuum systems
Abstract
Presented is a solution for a number of problems on calculation of composite radiative-molecular heat exchange in flat, cylindrical, and spherical systems with perforated screens in conditions of free-molecular flow. Given is an analysis of the influence of certain values, as screen perforation degree, disposition of the screen in the system, absorptivity and emissivity, accommodation coefficients of heat exchanging surfaces as well as their temperature level and pressure on the net heat transfer in studied systems. Showed is a role of separate mechanisms of heat transfer, depending on the change of aforesaid factors. Also analyzed is the influence of diffuse and specular components of radiative and molecular properties of heat exchanging surfaces on the heat flux and its components.
- Publication:
-
6th International Heat Transfer Conference, Volume 3
- Pub Date:
- 1978
- Bibcode:
- 1978iht.....3..379F
- Keywords:
-
- Heat Transfer Coefficients;
- High Vacuum;
- Molecular Interactions;
- Radiative Heat Transfer;
- Absorptivity;
- Emissivity;
- Graphs (Charts);
- Mathematical Models;
- Screens;
- Surface Properties;
- Tables (Data);
- Fluid Mechanics and Heat Transfer