Transmittance method measurement of thermal radiative physical parameters of aviation kerosene RP-3

The spectral transmittance radio calculation model of optical constants filled semitransparent liquid was developed. A novel inversion model of optical constants of liquid medium was developed based on spectral transmittance radio inversion calculation of optical cell filled with liquid fuel, which was validated and analyzed by measuring the optical constants of water. The measurements of transmittance spectrogram of optical cell filled with diesel fuel in the infrared wavelength 2~15 μm at normal incidence were investigated by Bruke V70 FTIR spectrometer. The optical constants and thermal radiative physical parameters of aviation kerosene RP-3 were achieved. The results show that, 1) The optical constants calculation precision of the novel method (IDTM model) is similar with MCDTM model, which is higher than SODTM model and SDTM model. 2) The transmittance capability of aviation kerosene RP-3 in the infrared wavelength 2~15 μm are weak, and there exist five absorption peaks, which are respectively 2.4 μm, 3.4 μm, 6.2 μm, 7.3 μm and 13.8 μm. 3) The spectral selectivity of optical constants and thermal radiative physical parameters of aviation kerosene RP-3 are stronger, whose values are urgently varied with different wavelengths.