FORECHAMBER OF COMBUSTION CHAMBER Russian patent published in 1997 - IPC

FIELD: power, transport and chemical engineering; combustion chambers of gas-turbine plants. SUBSTANCE: forechamber is provided with three circular blades air swirlers mounted coaxially relative to combustion stabilizer 1: outer swirler 2 and two inner swirlers 3 and 4 having opposite twisting. Part of fuel dispensing devices 5 and inner swirlers 3 and 4 are located at upward shift in flow relative to working surface 6 of combustion stabilizer. Swirlers 3 and 4 form premixing cavity 8 together with side wall of stabilizer and circular ferrule 7; part of fuel dispensing devices 5 are located at its inlet. Jets of air swirled by swirlers 3 and 4 enter premixing cavity 8 forming layer of mixture to which fuel is fed through fuel dispensing devices. After intensive mixing, rather homogeneous fuel-and-air mixture flows to recirculation zone after stabilizer and is burst mixing with swirled jet of air escaping from swirler. EFFECT: enhanced reliability. 2 dwg