TUBULAR-ANNULAR COMBUSTION CHAMBER OF GAS-TURBINE ENGINE Russian patent published in 2003 - IPC

FIELD: manufacture of gas-turbine engines. SUBSTANCE: tubular-annular combustion chamber includes flame tubes, each tube consists of row of telescopically arranged circular sections, corrugated ring placed between outer outlet part of each circular section and inner inlet part of adjacent circular section and fuel-injection nozzles. Each flame tube is linked to fuel-injection nozzle and circular gas collector attached to outer and inner bodies and carries flange across outlet positioned transverse to direction of flow, attached to wall of flame tube and connected to gas collector. Perimeter of corrugated ring amounts to 1.95-2.36 length of arc of outer part of flange in point of its connection with gas collector. Butts of each circular section and flange directed upstream and downstream of flow are made solid. Lower edges of corrugated ring in direction of flow and of circular section embraced by corrugated ring are built between adjacent circular sections with circular slit which height amounts to 0.15-0.25 distance between lower faces of corrugated ring and circular section embraced by corrugated ring. Height of circular slit in this case is equal to 0.02-0.03 distance between lower faces of circular sections placed downstream of flow. EFFECT: enhanced reliability and prolonged service life of flame tubes, improved fuel efficiency of combustion chamber. 3 cl, 7 dwg