MIXING OF COMBUSTIBLE SUBSTANCES PROCEDURE FOR GAS TURBINE ENGINE COMBUSTION CHAMBER Russian patent published in 2017 - IPC F23R3/30 F23R3/28 F23R3/46 

FIELD: engines and pumps.

SUBSTANCE: mixing of combustible substances procedure for gas turbine engine combustion chamber is carried out in a tubular-annular combustion chamber which comprises a plurality of circumferentially-spaced pipes closed between two cylindrical casings. These pipes restrict individual combustion areas. Each tube is designed as a tubular casing which has an upper end positioned upstream and comprising a front wall and a lower end positioned downstream. Combustion area is a tubular space of the tubular casing. Tubular space extends longitudinally from the front wall of the upper end of tubular casing to the lower end of tubular casing. The front wall comprises a plurality of air holes. There are the first nozzles and the second nozzles made in the tubular casing. The first nozzles are spaced apart and distributed circumferentially around the combustion area between the front wall and the lower end of the tubular casing. The second nozzles are spaced apart and distributed circumferentially around the combustion area between the front wall and the first nozzles which are positioned downstream of the second nozzles in the direction of the lower end of the tubular casing and lie in the first plane perpendicular to the longitudinal direction of the tubular space. The second nozzles are positioned upstream of the first nozzles in the direction of the upper end of the tubular casing and lie in the second plane perpendicular to the longitudinal direction of the tubular space. The method consists in the following. Premixed fuel-air mixture is injected into the tubular space through the first nozzles, each of the first nozzles delivers premixed fuel-air mixture to the tubular space in the direction forming an angle with the tangent to the tubular casing. Then the premixed fuel-air mixture is injected into the tubular space through the second nozzles, each of the second nozzles delivers premixed fuel-air mixture to the tubular space in the direction forming an angle with the tangent to the tubular casing. Premixed fuel-air mixture injected through the first nozzles has the first fuel / air ratio, and the premixed air-fuel mixture injected through the second nozzles has the second fuel / air ratio. The second fuel / air ratio is greater than the first fuel / air ratio. Air coming out of compressor is injected through a plurality of air holes through the front wall to the tubular space in longitudinal direction of the tubular space. Injecting a premixed fuel-air mixture into a tubular space through the first nozzles, injecting a premixed fuel-air mixture into a tubular space through the second nozzles and injecting the air coming out of compressor through a plurality of air holes through the front wall to the tubular space provide creation of the step fuel-air effect to improve combustion and reduce NO_x and CO emissions.

EFFECT: reduction of the fuel-consumption rate and life-extension.

4 cl, 7 dwg