METHOD FOR OPERATION OF TURBO-JET ENGINES Russian patent published in 2019 - IPC F02C9/00 

FIELD: engines and pumps.

SUBSTANCE: method for operation of a turbojet engine relates to the field of aircraft engine construction, in particular to methods for ensuring the gas-dynamic stability of turbojet engines under extreme conditions of operation. At first, for this type of engine, tests are conducted at maximum and afterburner modes of engine operation, and thrust R_initial is measured in these modes, as well as the discharge pressure of the low pressure compressor P_LPCinitial, the total air flow through the engine G_B∑initial, the discharge pressure of the high pressure compressor P_Kinitial, the turbine exhaust pressure P_4initial, the pressure at the engine intake P_intake, and the relation is calculated , , , then the degree of expansion in the turbines π_T∑ is successively changed upwards, at least discretely, with at least three values of π_T∑ the current values of the above parameters are measured and the above relations are calculated, the deviations of the current values from the initial values , , are calculated, functions and δπ_T∑=f(δR) are developed using them, then using the predetermined amount of short-term increase in gas-dynamic stability reserves and / or short-term decrease in thrust when increasing the unevenness of the air flow at the engine intake, the value of change of δπ_T∑ is determined and additionally introduced into the electronic controller of the engine as a program to maintain the degree of expansion in the turbines while increasing the unevenness of the air flow at the engine inlet, and in the afterburner modes of operation of the engine additional fuel supply is provided to the fuel headers of the afterburner chamber for partial recovery of engine thrust.

EFFECT: method allows to ensure the gas-dynamic stability of the engine with an increase in the non-uniformity of the air flow at the engine inlet without the use of additional liquids and without loss of thrust in the afterburner mode of engine operation.

1 cl, 4 dwg, 4 tbl