A theoretical study on using coatings to enhance the emittance of porous radiant burners is presented. Burners made of coated silica fibers are considered along with coating materials of silicon carbide, graphite, and platinum. The radiative properties of the fibers with and without coatings are computed using a radiative scattering theory and are used in a P-3 solution of the radiative transfer equation to predict the emittance of the burners. Graphite and platinum coatings are shown to enhance the emittance by a factor of three for a burner temperature of 1000 K, and by a factor of six for a temperature of 1500 K. It is also shown that it is possible to protect the graphite and platinum coatings from oxidation by applying a silica coating over them.
|Number of pages||14|
|Journal||Journal of Quantitative Spectroscopy and Radiative Transfer|
|Publication status||Published - 1 Jan 1995|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics