FIELD: gas-turbine engineering. SUBSTANCE: flue tube has front ring, external and internal casings with film cooling facilities made on their surfaces with annular crosswise slits inbetween whose axes are located in same plane perpendicular to flue tube axis. Distance from internal surface of front ring to plane of axes of annular slits is 0.28 to 0.4 of flue tube length. EFFECT: reduced emission of pollutants, improved reliability in engine operation. 3 dwg
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