Methods in forcing a gas turbine engine

The paper considers traditional and new methods in boosting the gas turbine engine thrust (power). The engines (stoichiometric, turbofan, etc.) reached their physical limitations; therefore, traditional methods based on increasing the gas temperature in front and behind the turbine and increasing the overall dimensions are becoming outdated. Introducing the external and internal mixed thermodynamic cycles could become the main method in boosting a gas turbine engine. The first approach has energy exchange with the external energy sources; the second - only with the external cycle. The method of internal thermodynamic cycles could be realized by hyperboost and the engine turbine turbocharge. Hyperboost is boosting the gas turbine engine thrust at the super- and hypersonic flight velocities by supplying liquid (water) to its inlet. The hyperboost physical essence signifies that the liquid (water) fed to the engine inlet at the super- and hypersonic flight velocities becomes the second working fluid. It participates equally with the first substance, i.e. air, in all the thermodynamic processes in the engine forming an additional (internal) thermodynamic cycle. Turbine boost is an increase in the gas flow consumption through it by means of the gas ejector. Turbine boost, like the hyperboost, is forming an additional (internal) thermodynamic cycle and creates a fundamentally new gas-dynamic connection between the design elements, i.e. a turboejector engine. The forced version of such an engine is limiting gas-dynamic perfection of a gas-turbine engine. The engine makes it possible to reach a flight speed corresponding to the М ? 7 Mach number with the overall efficiency of ? 55%. New methods in boosting a gas turbine engine in combination with the existing and new methods for increasing the gas temperature in front of the turbine are opening ways to creation of the super- and hypersonic aviation and construction of the aerospace systems capable of delivering satellites weighing up to 15 tons to the near-earth orbits.
EDN: OMHCTR, https://elibrary/omhctr

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