METHOD FOR CONTROL OF FUEL CONSUMPTION IN COMBUSTION CHAMBER AT GAS TURBINE ENGINE STARTING Russian patent published in 2023 - IPC F02C9/26 F02C7/26 

FIELD: aircrafts.

SUBSTANCE: controlling the operation of gas turbine engines (GTE), mainly in aircrafts. Invention can be used to control the supply of fuel to the GTE in the starting mode. A method is proposed for controlling the fuel flow into the combustion chamber at the start of a gas turbine engine, in which the rotor speed n is measured and the current value of the rotor acceleration (dn/dt)_cur and its specified acceleration (dn/dt)_set are determined, the current acceleration value (dn/dt)_cur with a set (dn/dt)_set, change the fuel flow into the combustion chamber depending on the deviation of the current value of acceleration from the set one. The coefficient K_n is formed depending on the current rotor speed, before starting the combustion chamber at a preselected rotor speed n₀, the value of the current rotor acceleration (dn/dt) is fixed, its deviation from the nominal value is calculated as [(dn/dt) - (dn/dt)_nom], the deviation value is multiplied by the coefficient K_n and the specified rotor acceleration (dn/dt)_set is adjusted by the obtained value. The value of n₀ is chosen equal to the rotor speed, at which the fuel is dispensed into the combustion chamber. When the current rotor speed exceeds a predetermined threshold n_dev, the coefficient K_n is assigned a value equal to zero.

EFFECT: increase of reliability of starting the engine, increasing manufacturability due to the optimal dosing of fuel at startup.

3 cl, 2 dwg, 1 tbl