利用加拿大BOMEN公司出产的MR-254型红外光谱仪，对固体推进剂羽流的红外辐射特性进行了研究。在分辨率为4 cm^-1、测试距离为5 m的条件下，实时测得了含铝改性固体推进剂和NEPE固体推进剂的红外发射光谱图，得到了推进剂在3~5 μm波段内的辐射能数据。采用燃烧产物分子的发射光谱精细结构谱线计算了羽流的温度，探讨了固体推进剂辐射能和温度的影响因素。实验结果表明，采用被动式遥感FTIR光谱可对固体推进剂羽流进行快速、实时的非接触式测量，是一种有效的研究手段。

The infrared radiation property of solid propellant plume was measured by a BOMEN MR-254 infrared spectrometer. At the resolution of 4 cm^-1 and the testing distance of 5 m between the plume and the spectrometer, the infrared emission spectra of aluminized solid propellant and NEPE solid propellant were recorded in real time. The radiation intensities of the plume vs. combustion time in 3-5 μm band region were obtained by calibrating the original spectra by instrument response function. The temperatures of the propellant plumes were calculated using the molecular fine structure emission spectral lines of the gaseous products released during combustion. Factors influencing the radiant energy and temperature of solid propellant were discussed. The experimental results show that the passive remote sensing FTIR, as a rapid, in situ and non-intrusive technology, can be used to study the infrared radiation characteristics of solid propellant plume in an effective way.