TUBULAR-ANNULAR COMBUSTION CHAMBER OF GAS TURBINE ENGINE Russian patent published in 2000 - IPC

FIELD: gas-turbine engines. SUBSTANCE: combustion chamber has fire tubes connected to gas collector which is joined to external and internal casings, its interior being formed by its own annular walls. Each fire tube has flange at outlet arranged in crosswise direction to flow; flange is fixed to fire tube wall and connected to gas collector. At radial planes of combustion chamber crossing planes of flange joints flange of each fire tube is stepped at edges and downstream of steps it has annular lips arranged coaxially to annular walls of gas collector. Exhaust sectional area of fire-tube flange amounts to 85-95% of its flow-opposing surface. Each fire tube is, essentially, Venturi tube with reduced curvature of sectional area in its radial planes crossing flange corners upstream of flange at distance not shorter than difference in radii of annular walls at their joints with flange. Curvature radius of any of cross-sectional areas of fire tube in its radial planes is smaller than that of any upstream cross- sectional area. EFFECT: augmented combustion process, reduced loss of heat and total pressure. 2 cl, 4 dwg