HEAT RECOVERY GAS TURBINE ENGINE Russian patent published in 2024 - IPC F02C7/10 

FIELD: machine building.

SUBSTANCE: invention relates to power engineering and can be used as small-size engines and power plants for aircraft, ground vehicles and stationary units. Gas turbine engine with heat recovery comprises a blade compressor with a drive turbine; free turbine with consumer drive shaft; annular combustion chamber with a flame tube and with a channel for supplying air to the combustion chamber, located coaxially with the blade compressor; an exhaust gas line and a modular recuperative heat exchanger with an annular housing located coaxially with the annular combustion chamber and having an internal gas header connected to the outlet of the free turbine; external gas manifold connected to exhaust gas line; side air manifold connected to the outlet of the vane compressor; and a side cover located on the side of the annular housing opposite to the side air manifold; wherein the recuperative heat exchanger modules are made of rectangular shape and are uniformly installed along the circumference of the annular housing with the formation of closed cavities between them, and each module has plate heat exchange matrix connected by gas channels to internal and external gas manifolds, and by air channels – to side air manifold and to air supply channel to combustion chamber. Annular housing of recuperative heat exchanger is located coaxially relative to annular combustion chamber, and its side cover is equipped with a rotary channel connected to the air channels of the heat exchange matrices of the recuperative heat exchanger modules and to the closed cavities of the annular housing, which inner walls are equipped with openings for connection of closed cavities with air supply channel to combustion chamber.

EFFECT: improved weight and size characteristics of the engine and improved economic performance due to reduction of hydraulic and heat losses, as well as due to stabilization of working process in flame tube of combustion chamber.

1 cl, 8 dwg