实验测量了不同厚度的泡沫镍在0.4~2.2μm波长的法向-半球反射率/透射率,采用蒙特卡罗法对泡沫镍的计算机断层扫描结构进行孔隙尺度辐射传输建模,对比研究了泡沫镍辐射特性随入射光谱和样品厚度的变化,计算得到了泡沫镍辐射特性的孔隙尺度分布特征。结果表明:所建立的泡沫镍孔隙尺度辐射传输模型在计算其光谱辐射特性方面具有正确性。波长增长,吸收率逐渐降低,反射率逐渐升高;样品厚度增加,吸收率逐渐升高并趋于稳定,透射率逐渐降低至0。孔隙尺度辐射特性分布强烈依赖于局部纹理结构,波长1.5μm时,泡沫孔隙中的平均吸收率是肋筋上的1.5倍,而肋筋上的平均反射率则达到孔隙中平均反射率的3.7倍。 The normal-hemispherical reflectivity / transmittance of nickel foam with different thicknesses at 0.4 ~ 2.2μm was measured experimentally, and the aperture-scale radiative transfer model was constructed by Monte-Carlo method. The characteristics of the radiation characteristics of nickel foam were calculated with the change of the incident spectrum and the thickness of the sample. The results show that the established foam pore size radiation transfer model is correct in calculating the spectral radiation characteristics. With the increase of wavelength, the absorption rate gradually decreased and the reflectivity increased gradually. The sample thickness increased, the absorption rate gradually increased and stabilized, and the transmittance gradually decreased to zero. The pore size distribution of radiation strongly depends on the local texture. At a wavelength of 1.5 μm, the average absorptivity in the foam pores is 1.5 times that on the ribs and the average reflectance on the ribs reaches 3.7 times the average reflectance in the pores .