BY-PASS TURBOJET ENGINE Russian patent published in 2004 - IPC

FIELD: air and space craft.

SUBSTANCE: proposed by-pass turbojet engine for high-speed air and space craft has low-pressure compressor and series-mount3ed in inner circuit gas generator with high-pressure compressor, combustion chamber and low-pressure turbine mechanically connected with low-pressure compressor. Outer circuit combustion chamber and outer circuit turbine connected with low-pressure turbine by shaft are arranged in outer circuit. Adapter arranged after low-pressure turbine communicates space after low-pressure turbine with annular channel located on periphery of outer circuit. Air channel of outer circuit communicates with space before outer circuit combustion chamber. By-pass turbojet engine contains also propulsive jet nozzle and controllable valve to bypass air from space before outer circuit turbine into annular channel. In engine operating on fuel featuring high cold capacity, fuel-air heat exchanger of fuel feed system delivering fuel into combustion chambers with controllable fuel valves is installed in air channel before gas generator in direction of air flow. Said heat exchanger is provided with two sections. First section is connected by output to gas generator combustion chamber, and second section is connected to combustion chamber of outer circuit. Invention makes it possible to increase thrust and gas pressure before propulsive jet nozzle to level at which craft can fly at M=5.5-6.0 by means of one turbojet engine instead of two engines, namely, turbojet and ram-jet ones.

EFFECT: improved reliability.

1 dwg