METHOD FOR AUTOMATIC PROTECTION OF A GAS TURBINE ENGINE AGAINST SURGE Russian patent published in 2023 - IPC F04D27/02 

FIELD: aircraft engine building.

SUBSTANCE: invention relates to the field of aircraft engine building and can be used in ACS gas turbine engines for various types of aircraft. The invention can also be applied in automatic control systems of gas turbine installations for power plants, superchargers of main gas pipelines, power gas turbine installations of sea and river vessels, etc. In the method for automatic protection of a gas turbine engine from the occurrence of unstable operation of the compressor, which involves measuring the pressure parameter downstream of the compressor Pc^*, measuring the high-pressure rotor speed parameter n_hp, measuring the pressure parameter at the engine inlet Pin^*, generating a “surging” signal with subsequent shutdown of the fuel supply into the combustion chamber and turning on the air bypass in the compressor, removing the “surge” signal after the surge has been eliminated, generating a signal to turn on the fuel supply to the combustion chamber, dosing fuel into the combustion chamber of a gas turbine engine according to the law of injectivity control _hp/Pin^* = const, where _hp is the first time derivative of the parameter n_in, the fuel consumption parameter Gf in the combustion chamber is additionally measured, while in the process of injectivity, the metered fuel consumption in the combustion chamber is limited according to the dependence , where is the reduced rotational speed of the high-pressure rotor, Tin^* is the air temperature at the inlet to the gas turbine engine, and the compressor bypass valves are closed when the specified values of the parameters are reached in the injectivity process.

EFFECT: with optimal speed, a smooth, without excessive fuel overshoots, reliable restoration of the thrust of the gas turbine engine after the protection against compressor surge is triggered.

1 cl, 1 dwg