STARTING IGNITER ASSEMBLY WITH CENTRAL FUEL PRE-INJECTION FOR COMBUSTION CHAMBER OF GAS TURBINE ENGINE Russian patent published in 2020 - IPC F02C7/26 F23R3/34 F23R3/14 

FIELD: machine building.

SUBSTANCE: unit (1) of starting igniter for combustion chamber (28) in gas turbine engine (10) contains starting igniter (60), radial swirler (70). Starting igniter (60) comprises working surface (62) of igniter head, having multiple holes (2) for preliminary fuel injection, which are configured to supply pilot fuel for combustion. Working surface (62) of igniter head has center (65). Radial swirler (70) is configured to generate swirling mixture of main fuel and air, has multiple swirler blades (72) arranged circumferentially around center (65) of working surface (62) of igniter head and radially offset around said center. Blades (72) of swirler include radial inner thin ends (74), which limit area (64) of igniter. Area of igniter is concentric relative to center (65) of working surface (62) of igniter head. Each of holes (2) for preliminary fuel injection on working surface (62) of igniter head is located within igniter area (64), so that distance (3) to hole (2) for preliminary fuel injection from center (65) of working surface (62) of igniter head is 50 percent or less distance (4) to edge (66) of area (64) of igniter from center (65) of igniter head working surface (62) when measured in straight line (99), which connects center (65) of working surface (62) of igniter head with edge (66) of igniter area (64) and passes through hole (2) for preliminary fuel injection.

EFFECT: invention is aimed at reduction of toxic emissions, in particular – NO_x.

12 cl, 12 dwg