FIELD: engine engineering. SUBSTANCE: fuel and oxidizer are fed to source 1 of heated fluid. Heated fluid obtained is fed to turbine stage 2. Rarefication is created at the outlet of source 1 of heated fluid and outlet of the intermediate turbine stage 2. A portion of exhaust fluid is removed in this stage. Heated fluid is expanded downstream of source 1 of heated fluid, swirled about the axis of the engine, expanded and cooled upstream of turbine stage 2 using the portion of exhaust fluid. The gas-turbine engine has at least one turbine stage 2 mounted inside the flowing section, source 1 of heated fluid with inlet and outlet and connected with turbine stage 2, device for swirling fluid with respect to the longitudinal axis of the engine, device 3 for creating rarefication at the part of the flowing section between the outlet of source 1 of heated fluid and outlet of turbine stage 2. The inlet of source 1 of heated fluid is in communication with the atmosphere. The outlet is made up as part 5 for expanding fluid and is in communication with the zone between the outlet of turbine stage 2 and device 3 for creating rarefication. EFFECT: enhanced efficiency. 21 cl, 12 dwg
