光学学报, 2014, 34 (s1): s112009, 网络出版: 2014-08-12
液态碳氢燃料透射光谱测量和光学参数反演
Transmittance Spectra Measurement and Optical Parameters Inversion of Liquid Hydrocarbon Fuel
摘要
提出了一种基于填充液态碳氢燃料类半透明液体材料光学腔的透射光谱反演其介质光学常数的新方法,对通过实验获取水的光学常数进行了方法验证。采用Bruke V70傅里叶红外光谱仪实验测量了填充乙醇光学腔在波长2~15 μm的透射光谱,基于新方法反演得到乙醇在部分波长区域的光学常数和热辐射物性参数。研究结果表明,新方法(IDTM模型)反演液体光学常数精度同MCDTM模型基本一致,且明显高于SODTM模型和SDTM模型。乙醇在波长2~15 μm范围透光性能较差,其中存在波长3.57 μm,6.88~7.88 μm、9.12~9.74 μm,11.37 μm等4个强吸收区域。乙醇的光学常数和热辐射物性参数光谱选择性很强,在不同波段其值差距较大。
Abstract
A novel inversion method of optical constants of semitransparent liquid hydrocarbon fuel is developed based on inversion calculation of spectral transmittance radio of optical cell filled with glass-liquid fuel-glass configuration, and validated by measuring the optical constants of water. The measurements of transmittance spectrogram of optical cell filled with ethanol in the infrared wavelength of 2~15 μm at normal incidence are investigated by Bruke V70 FTIR spectrometer. The optical constants and thermal radiative physcial parameters of ethanol are achieved. The calculation precision of the novel method (IDTM model) is similar with MCDTM model, which is higher than SODTM and SDTM models. The transmittance capability of ethanol in the infrared wavelength of 2~15 μm is weak, and there are four absorption peaks, whose wavelengths are, respectively, 3.57 μm, 6.88~7.88 μm, 9.12~9.74 μm and 11.37 μm. The spectral selectivities of optical constants and thermal radiative physcial parameters of ethanol are stronger, whose values are urgently varied with different wavelengths.
李栋, 齐晗兵, 吴国忠. 液态碳氢燃料透射光谱测量和光学参数反演[J]. 光学学报, 2014, 34(s1): s112009. Li Dong, Qi Hanbing, Wu Guozhong. Transmittance Spectra Measurement and Optical Parameters Inversion of Liquid Hydrocarbon Fuel[J]. Acta Optica Sinica, 2014, 34(s1): s112009.