Abstract
Spectral remote sensing is a very popular method in atmospheric
monitoring. The paper presents an approach that involves mid-infrared
spectral measurements of combustion processes. The dominant feature in
this spectral range is CO2 radiation, which is used to determine the
maximum temperature of nonluminous flames. Efforts are also made to
determine the temperature profile of hot CO2, but they are limited to the
laboratory conditions. The paper presents an analysis of the radiation
spectrum of a non-uniform-temperature gas environment using a radiative
transfer equation. Particularly important are the presented experimental
measurements of various stages of the combustion process. They allow for a
qualitative description of the physical phenomena involved in the process
and therefore permit diagnostics. The next step is determination of a
non-uniform-temperature profile based on the spectral radiation intensity
with the 8 m optical path length.
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