GAS-TURBINE ENGINE FUEL-FEED CONTROL METHOD Russian patent published in 2001 - IPC

FIELD: mechanical engineering; gas-turbine engines. SUBSTANCE: method is based on control of burning area in chamber, determining flame temperature and control of fuel-air ratio. Burning area is increased by connecting several fuel circuits, one by one. Each circuit has group of chamber burners and fuel meter. Fuel flow rate in connected circuit is increased until preset temperature of flame providing low level of discharge harmful substances is obtained. Then following circuit is connected, and flame temperature in previously connected circuits is maintained constant at further increase in engine power output. Constant flame temperature in operating circuits is maintained by regulating fuel- air ratio. Automatic process control system of combustion chamber determines required fuel-air ratio and fuel consumption for each circuit under each operating duty of engine by measured parameters and, after comparing with measured fuel consumption, fuel consumption is regulated by corresponding device. Circuits cut in at low operating duties are enriched by directing part of air from burning zone to chamber output. EFFECT: provision of low emission of nitrogen oxides, carbon monoxide and noncombusted hydrocarbons under any operating conditions of engine, stable operation of combustion chamber and high efficiency of engine. 2 cl, 5 dwg