金属のあらい表面におけるふく射反射の角度特性とその伝熱パラメータ表現

概要

論文の詳細を見る
Directional distribution of bidirectional reflectance ρ for visible laser irradiation is investigated experimentally on rough metal surfaces. The reflection is found to be far from perfect-diffuse. Relationship of reflection characteristics and runs surface roughness Σ is not simple in case Σ is of an order of the wavelength of incident radiation. It is recommended to analyze the reflection characteristics on (ρ cos θ_R), where θ_R is the zenithal angle of reflection. What has been called 'off specular' peak does not appear in this case. A reflection model for describing the directional distribution is presented for heat. transfer applications. The model can evaluate the values of the specular component Rs and the perfect diffuse component R_d of the hemispherical reflectance R_H for directional incidence. Calculated values of the specularly reflected energy ratio (R_s/R_H) do not always fit with our impression on the specularness in the directional distribution of ρ.
一般社団法人日本機械学会の論文
1999-02-25