INJECTION SYSTEM OF AIR MIXED WITH FUEL TO COMBUSTION CHAMBER OF GAS TURBINE ENGINE Russian patent published in 2013 - IPC F23R3/28 F23R3/14 

FIELD: engines and pumps.

SUBSTANCE: injection system of air mixed with fuel to combustion chamber of gas turbine engine includes a fuel injector and a Venturi tube located behind the injector in the flow direction and coaxially in relation to it. Venturi tube includes inner surface restricting the pre-mixing chamber, in which fuel and air flow supplied from external chamber and passing through the primary swirler located in the flow direction before the Venturi tube are mixed. Venturi tube also includes an internal annular cavity intended for air circulation and connected by means of air intake channels to the external chamber and by means of air outlet channels to the pre-mixing chamber. Air outlet channels are opened on inner surface of the Venturi tube to prevent the soot deposition and coke formation on that surface.

EFFECT: enlarging service life of Venturi tube owing to reducing the soot deposition and coke formation.

15 cl, 7 dwg