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

FIELD: gas turbine engines. SUBSTANCE: proposed pre-combustion device of annular combustion chamber contains inner branch pipes with inlet cylindrical section and outlet diffuser trapezoidal section with ribbed outer surface, outer coaxial trapezoidal branch pipes forming,. Together with surface of inner branch pipes, spaces limited by adjacent ribs, vane swirlers arranged at inlet of cylindrical sections of inner branch pipes and fuel nozzles installed in swirler bushings. Holes made in outer trapezoidal branch pipe serve to supply cooling air to spaces. Said holes are made with relative pitch protected by invention. Area of holes increases in direction of angular zones of trapezium. Summary area of holes is 0.3-1.5 of summary area of cross section of spaces. EFFECT: improved cooling of pre-combustion device members of annular combustion chamber. 4 cl, 5 dwg