漫反射各向异性散射介质内的温度热流场

TEMPERATURE AND HEAT FLUX FIELDS IN ANISOTROPIC SCATTERING MEDIUM WITH DIFFUSE SURFACES

本文采用射线踪迹结合节点分析法和谱带模型,研究了漫反射不透明边界下吸收、发射、各向异性散射介质内的热辐射传递过程。考虑介质辐射能的入射和散射方向,导出漫反射、不透明边界、各向异性散射介质的辐射传递系数。在辐射平衡的情况下,考察了表面发射率和散射反照率对介质内辐射热流和温度场的影响。研究表明,介质不透明边界处存在温度跃迁现象,而且,内界面发射率越大,相应界面温度跃迁越小。

Ray-tracing-node-analyzing method combined with spectral band model is applied to investigate radiative heat transfer in an absorbing, emitting and anisotropically scattering medium with opaque diffuse surfaces. Considering incident and scattering directions of radiative energy, radiative transfer coefficients for anisotropic scattering medium with diffuse and opaque boundary surfaces are deduced. Under the condition of radiative equilibrium, this paper examines the effects of surface emissivity and scattering albedo on radiative heat flux and temperature fields. The present results show that temperature jump exists at opaque borders, and the jump decreases with increasing of emissivity of inner side of boundary.