OUTLET DEVICE OF DOUBLE-FLOW GAS-TURBINE ENGINE Russian patent published in 2013 - IPC F02K1/48 

FIELD: engines and pumps.

SUBSTANCE: outlet device includes an outer housing of and engine, an inner housing of a turbine, a tail cone, their attachment elements located after an impeller of the final turbine stage, and a mixer. Attachment elements are made in the form of hollow racks. The mixer is made in the form of an annular element with through petal channels located inside it along its perimetre, which alternate with petal channels fixed in outlet sections of hollow racks. Through channels are interconnected with an internal hot gas channel, and channels fixed in outlet sections of hollow racks are interconnected with an external cold air channel. The annular element is attached to the turbine fairing, the engine housing and the turbine cone. Inlet sections of shaped racks of internal outline are turned towards rotation direction of the impeller of the final turbine stage through an angle of 20-40° to its longitudinal axis. Walls of channels and middle line of outlet sections of racks are directed along the turbine longitudinal axis. Rack chord length is chosen so that ratio of the rack chord length to distance between racks is 1-3.

EFFECT: invention allows increasing turbine efficiency, providing practically axial flow at its outlet, reducing infrared emission and improving cooling of structural members.

2 cl, 6 dwg