Suscripción a Biblioteca: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

IMPROVEMENT IN SPECTRAL DIRECTIONAL EMISSIVITY MEASUREMENT TECHNICS BY DIRECT METHODS

Get access (open in a dialog) DOI: 10.1615/IHTC7.2730
pages 509-513

Sinopsis

A critical analysis is made for different experimental errors which can affect spectral directional emissivity measurements of opaque surfaces by direct methods, using a comparison with a black-body .
The experimental setting presented here allows spectral directional emissivity measurements of metallic samples in the range of 600 to 1000 K and 2 to 15 pm. These measurements are performed under polarized radiation using a double beam technique. Such a setting minimizes errors originating from parasite polarization introduced by the optical components of the system and temperature difference between the sample and the blackbody. Problems of oxidation are avoided by placing the sample in a controled atmosphere enclosure.
The proposed experimental technics have been tested on stainless steel samples. Results are preseteted.