Development of a low-emission combustion chamber of an industrial natural gas turbine with $\mathrm{NO}_x$ and $\mathrm{CO}$ emission less than $5$ ppm

This paper presents an analysis of the hydrodynamic and physico-chemical features of flow and combustion in a low-emission combustion chamber (LECC) which differs from other combustion chambers in design and combustion modes of a lean air-fuel mixture. The influence of the composition and residence time of the mixture in the LECC on the emission of $\mathrm{NO}_x$ and $\mathrm{CO}$ was considered. The organization workflow was proposed, and an LECC prototype was developed whose emission level of $\mathrm{NO}_x$ and $\mathrm{CO}$ less than $5$ ppm is $2$–$5$ times lower than that in available LECCs. The results of experimental studies of the LECC prototype with variations in flame temperature, pressure, and residence time in the LECC confirm the validity of the proposed solutions.