JET TURBINE ENGINE Russian patent published in 2012 - IPC F02K1/00 

FIELD: engines and pumps.

SUBSTANCE: jet-turbine engine is double-flow and includes housing, turbines with rotors, compressors, fuel pump group, jet nozzles with varying critical cross section, cooled combustion chamber and control system. Control system is equipped with master and working members and implements the change-over of engine from rotor rotation frequency mode corresponding to the frequency range, providing no required stability margins of compressors operation to frequency mode providing the required stability margin both in intermediate modes and in maximum and boost operating modes of engine. In situations of intermediate modes the jet nozzle has the possibility of changing the critical cross section. In situations corresponding to maximum and boost operating modes of engine, the latter is provided with the system ensuring the increase in pressure drop on turbines till the required stability margins of compressors operation are achieved.

EFFECT: high performance of engine in working frequency range of rotor rotation due to enlarging the critical section area of jet nozzle and due to increasing the pressure drop on turbines till the required stability margins of compressors are achieved, thus providing the required stability margins of compressors operation as per flight safety conditions.

6 cl, 2 dwg