Modelling of the effective emissivity of a graphite black body

Autor:	M J Ballico
Rok vydání:	1995
Předmět:	Surface (mathematics) Vignetting Optics Materials science business.industry General Engineering Theoretical models Radiance Emissivity Reflector (antenna) Graphite Tube (container) business
Zdroj:	Metrologia. 32:259-265
ISSN:	1681-7575 0026-1394
DOI:	10.1088/0026-1394/32/4/3
Popis:	Measurements of the effective radiance temperature of a high-temperature graphite tube black-body furnace are compared with those calculated from two theoretical models. The first model extends the conventional annular zone model by including effects of vignetting and temperature gradients. Because the black-body surface is not a perfect diffuse reflector, this is found to be insufficiently accurate and a Monte-Carlo integration with a diffuse/Fresnel-specular surface model is presented, which gives good agreement with the measured data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c7365b99b74da98081339d496998f5b7 https://doi.org/10.1088/0026-1394/32/4/3 Zobrazit plný text záznamu