METHOD OF USING GAS-AIR THERMODYNAMIC CYCLE FOR INCREASING EFFICIENCY OF SMALL TURBO-ENGINE Russian patent published in 2020 - IPC F02C3/32 F01K23/02 

FIELD: power engineering.

SUBSTANCE: invention relates to power engineering. Device, in which the gas-air thermodynamic cycle is performed, contains a pipe with flanges at the ends as the body. Supersonic Laval nozzle is inserted into one of the ends of the body and attached to the flange. Latter comprises a skew-sharpening, forming an annular supersonic nozzle with the housing wall. Annular space in housing is used to wall of Laval nozzle, which is used for combustion chamber. Gas-air flow outlet branch pipe is inserted into the second end of the housing, and an outlet branch pipe of the gas-air flow is connected, which contains the first confusor passing into the first cylindrical section, the second confusor passing into the second cylindrical section, which changes into the diffuser. Theoretically required amount of compressed air for fuel combustion is injected into combustion chamber by high-pressure compressor. Cumulative flow of hot gas is formed by annular nozzle and confusor wall. Hot gas exiting the annular nozzle flows against the confusor wall, a one-dimensional, cumulative annular flow, inside which critical rarefaction caused by internal rupture in the annular flow is created. Low-pressure compressor injects cold air into the annular flow, which breaks the gap by filling the space inside the annular flow, creating a common continuous gas-air flow with the working gas. Gas-air flow enters diffuser, where its high-pressure head is converted to pressure and directed to turbine, from coupling of which mechanical work is removed.

EFFECT: invention is intended for modernization of gas turbine and gas piston engines.

1 cl, 3 dwg