Study on multi-spectral inversion of temperature and soot concentration in flames

  Objectives  In order to accurately understand the temperature inside the flame and the distribution of soot concentration,

  Methods  the distribution of the two-dimensional temperature and the soot volume fraction inverted from the spectral intensity image of the flame was studied using a hyper-spectrometer. Firstly, a hyper-spectrometer was used to capture the laboratory's vinyl laminar diffusion flame to obtain a high-resolution image containing multi-spectral information. Then, the wavelength in the image was analyzed and screened, the multi-wavelength radiation intensity information was obtained by calibrating the blackbody furnace, and the two-dimensional distribution of the flame temperature and the soot volume fraction was obtained by inversion.

  Results  Comparing the obtained flame temperature with the results from other literature, the maximum temperature deviation is 2.77%, and the results are in good agreement,

  Conclusions  indicating the accuracy of the distribution of temperature and soot volume fraction.