ANNULAR COMBUSTION CHAMBER Russian patent published in 2001 - IPC

FIELD: gas-turbine engines. SUBSTANCE: annular combustion chamber of gas-turbine engine is intended for two-zone successive combustion of liquid and gaseous hydrocarbon fuel; it has housing with flame tube arranged inside it and detachable idle speed injectors. Front device of flame tube includes two twin thin-walled U-shaped flame holders; outer flame holder has holes in front portion which are coaxial relative to injectors; elongated webs are provided at outlet which are fastened with casings of second part of flame tube. Inner flame holder has L-shaped branch pipes with bell mouths at outlet located coaxially relative to idle-speed injectors and nozzle inside cavity of flame holder. Mounted in clearance between flame holders are groups of shaped thin-walled branch pipes whose inlet portions are tightly inserted in holes of outer flame holder which are coaxial relative to main mode injectors; shears of outlet portions are located in front of holes of inner flame holder forming continuous chains of segment-shaped nozzles over circle. EFFECT: complete combustion at intermediate modes of operation. 3 cl, 6 dwg