Heat transfer in slagging MHD radiant boilers
Abstract
A combined convection-radiation model is formulated to study heat transfer characteristics of slagging MHD radiant boilers. The model includes the contributions of carbon dioxide, water vapor, potassium atoms, and slag particles to gas radiation; it also accounts for the presence of slag layer on the wall of the radiant boiler. In order to determine the slag layer dynamics, the mechanism of slag particle deposition by thermophoresis and by fluid turbulence is investigated. The role of a slag layer in moderating the influence of refractory thickness on heat transfer is illustrated. The calculations indicate that an adequately slow cooling rate of the combustion gas can be realized in the radiant boiler.
- Publication:
-
AIAA, Aerospace Sciences Meeting
- Pub Date:
- January 1981
- Bibcode:
- 1981aiaa.meet.....I
- Keywords:
-
- Boilers;
- Convective Heat Transfer;
- Magnetohydrodynamic Generators;
- Radiative Heat Transfer;
- Slags;
- Temperature Distribution;
- Thermodynamic Properties;
- Thermophoresis;
- Wall Temperature;
- Fluid Mechanics and Heat Transfer