The turbofan jet engine with an isolated thermal circuit is designed for use in aviation, both for large and for small aircraft, including unmanned aircraft systems.
The principle of the engine operation is based on the formation of jet thrust by the turbofan, which is powered by a turbine with a closed circuit of the working body.
The engine advantages:
- High efficiency (specific fuel consumption up to 0.422 kg/kgf*h);
- Extremely low heat trail (jet gas temperature may be less than +42°C);
- Possibility to manufacture an engine from polymer composite materials, which allows for civil aviation gain an advantage in reducing mass (in 2 or more times), and for military aviation – to significantly reduce the radar visibility of the aircraft;
- Ability to use a wide range of fuels, including liquid biofuels;
- Zero NOx emissions due to the lack of high-temperature fuel combustion.
Engine operating principles description
1-Air for fuel oxidation;
3-Evaporation of the working fluid
4-Catalytic heat-emitting element
5-Contour of the working fluid (steam)
6-Fuel oxidation cooled products
7-Low pressure condensate contour
8-High-pressure condensate contour
12-Working fluid circuit turbine
13-Exhaust steam duct
16-Air jet thrust
Air (1) by air intake (2) enters the catalytic heat dissipation element (4), where it reacts with the supplied fuel (17) in the controlled non-flammable catalytic oxidation. Oxidation products (6) are released into the atmosphere. The heating element is located in the evaporator of the working fluid (3), where the working fluid (organic nature, non – flammable and with a low boiling point-less than 60°C) boils under the heat of the heating element and forms superheated steam, which is discharged along the contour of the working fluid (5) to the turbine (12). Turbine, by means of magnetic couplings rotates the shaft (10) on which the turbine fan (11) is mounted, generating the jet thrust (16) from air flows (9). The exhaust steam of the working fluid from the turbine through the pipeline (13) enters the cooling jacket (14) of the engine, where it is cooled by the air going to form the jet thrust, further heating it, thereby expanding and increasing the rate of its discharge from the nozzle. From the cooling jacket along the low-pressure circuit (7), the condensate of the working fluid is fed back to the evaporator of the working fluid by the compressor-pump (15), driven by the turbine, along the high-pressure condensate circuit (8).