Formulas for Radiant Heat Transfer Between Nongray Parallel Plates of Polished Refractory Metals
Abstract
Hemispherical emittance, both total and normal, were calculated from normal spectral-emittance data obtained from other sources. The metals evaluated were clean, polished tungsten, molybdenum, and tantalum, each of which exhibits spectral emittances that vary considerably with temperature and wavelength. Net radiant heat flow between two parallel, infinite plates was computed by summing the monochromatic energy exchange. The evaluation was made for all nine possible combinations obtained by interchanging metals on the two surfaces. The results are graphically presented as a function of the temperatures of the two surfaces.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1965
- Accession Number
- ADA392835
Entities
People
- J. R. Branstetter
Organizations
- National Aeronautics and Space Administration