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The Effect of Surface Roughness on Measuring Thermal Emissivity  

오기수 (단국대학교 공과대학 기계공학과)
배신철 (단국대학교 공과대학 기계공학과)
Publication Information
Journal of Welding and Joining / v.21, no.7, 2003 , pp. 65-70 More about this Journal
Abstract
Thermal emissivity is generally affected by surface situation of material such as roughness. In this study, the effect of surface roughness on measuring thermal emissivity is experimented. And emissivity measurement method and equipment using hemisperical mirror is also reviewed. As the result of this research, thermal emissivity increased as long as increasing surface roughness. So, surface roughness is a essential check point when we measure the emissivity.
Keywords
Surface roughness; Thermal emissivity; Hemispherical mirror; Black body;
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