Abstract
The paper deals with an optical method for monitoring processes in combustion chambers of gas-turbine engines. The developed facility empowers to monitor combustion parameters indirectly and in a real time by not disturbing primary burning flux. The method is based on detection of the radiation emitted in narrow spectral ranges of visible range from molecules presented in the combustion products within a gaseous nonpremixed fuel flame. Emissions from C2 and CH radicals were used to make correlations with flame temperature and fuel/air equivalence ratio. The measurements have been carried out on a special developed test rig. A system consisting of a spectrum analyzer, a fiber-optic bundle, and a leucosapphire optical rod has been developed and tested on a propane burner with its maximum temperature more than 1400 K.
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