DOUBLE-FLOW TURBOJET ENGINE Russian patent published in 2003 - IPC

FIELD: turbojet engines. SUBSTANCE: proposed double-flow turbojet engine contains fan, axial-flow compressor with working wheels and rows of guide vane assemblies, bypass channels to communicate passage areas of compressor and outer circuit. Bypass channels are made in form of holes uniformly spaced over circumference and made in section square to longitudinal axis of engine between first working wheel of compressor and row guide vane assemblies placed behind the wheel. Area of hole through section is 3- 10% of area of passage part of compressor in hole location section. Shaped streamlined inserts can be fastened on wall of outer circuit opposite to holes to change backpressure at hole outlet. Invention makes it possible to improved starting of double-flow turbojet engine and increase margin of stability at unchanged parameters of engine. EFFECT: improved reliability of engine owing to automatically regulated bypass of air from behind compressor into second circuit. 2 cl, 3 dwg