METHOD FOR CONVERSION OF THERMAL ENERGY INTO MECHANICAL ENERGY IN GAS-TURBINE ENGINE AND A GAS-TURBINE ENGINE

The invention relates to gas-turbine engines implementing the method. The invention may be used in gas-turbine engines and is directed at increasing the effectiveness and reliability of gas-turbine engines. The heated working medium is expanded, and then the thermodynamic condition of the working medium to be introduced to the turbine stage is changed by the use of an auxiliary fluid medium and it is fed to the turbine stage. A part of the working medium worked out in the turbine stage is removed and its thermodynamic condition is changed by introducing to it an auxiliary working medium, after which the worked-out medium with the changed thermodynamic condition is mixed with the heated and expanded working medium before feeding it to the turbine stage. The gas-turbine engine has a turbine stage mounted in the flow-through section (10), a source (1) of the heated and expanded working medium and a device for changing the thermodynamic condition of the heated and expanded working medium with the use of an auxiliary fluid medium. The source (1) of the heated working medium has a zone (2) of expansion of the heated working medium and a mixing zone (15) located between the expansion zone (2) and the inlet of the turbine stage (7). There is a device for changing the thermodynamic condition of the worked-out working medium which has a mixing zone (13) connected on one side to the outlet of the turbine stage (7) and to a source (5) of the auxiliary fluid medium, and, on the other side to the section (6) of the mixing zone (15) of the source (1) of the heated working medium located on the side of the zone (2) of expansion of the heated working medium. L'invention porte sur des turbomoteurs permettant de mettre en oeuvre un procédé qui vise à en augmenter le rendement et la fiabilité. Le fluide de travail est chauffé et subit une dilatation puis on modifie ses caractéristiques thermodynamiques, en vue de son introduction dans l'étage de turbine, par l'utilisation d'un fluide auxiliaire. Une partie du fluide de travail dirigé vers la turbine est prélevé et mélangé avec un fluide auxiliaire qui en modifie les caractéristiques thermodynamiques, après quoi le fluide ainsi modifié est à son tour mélangé avec le fluide de travail réchauffé et dilaté, avant d'alimenter l'étage de turbine. Le turbomoteur comporte un étage monté après la conduite d'amenée (10), une source (1) de fluide de travail réchauffé et dilaté et un dispositif permettant de modifier les caractéristiques