Remote Fourier Transform Infrared Emission Spectroscopy in the Studies of the Solid Propellant Combustions

In this paper infrared emission spectra of the solid propellant combustion using remote Fourier transform spectroscopy have been studied. Both the infrared spectral radiance distributions and gas quantitative method for solid propellant combustions by remote Fourier transform infrared emission spectroscopy have been presented. In the method we utilize estimating temperature measuring models, which are modified by Junde Wang, based on emission fundamental band measurements of HCl or HF. Through measuring the temperature both the infrared spectral radiance distributions of the solid propellant combustions and their emisivities can be obtained. A remote measured gas concentration model based on combustion temperature, spectral radiance and emissivity has been developed. Field single-ended measurements at long distances for solid propellant plumes at temperature 1700—3500K can be extended to measuring fluctuations of instantaneous temperature and combustion reaction products.