GAS-TURBINE ENGINE Russian patent published in 2011 - IPC F02C7/08 

FIELD: engines and pumps.

SUBSTANCE: gas-turbine engine comprises compressor with cooled or with theoretical adiabatic process of compression, device for ignition and combustion of fuel, turbine, device of spent gases heat return into thermodynamic cycle of engine, comprising rotary heat-exchange solid with heat-exchange elements, or with units of heat-exchange elements, comprising heat-exchange surfaces washed with engine working substance, also with working air downstream compressor and spent gases downstream turbine. Heat-exchange device is arranged in the form of spent gases heat recuperator, and its heat-exchange solids are arranged as spaced from each other and are installed both downstream compressor, but upstream turbine, and downstream turbine, or are arranged in the form of heat-exchange unit. Heat-exchange solids of spent gases heat recuperator are arranged as comprising tubes or from elements comprising internal cavities-channels. Internal cavities-channels of heat-exchange elements of heat-exchange solids are filled with intermediate coolant and are included in system of intermediate coolant circulation between rotary heat-exchange elements heated with spent gases downstream turbine and rotary heat-exchange elements, heating working air of engine downstream compressor. Heat-exchange elements are installed in balanced and coaxial or axisymmetric manner in heat-exchange solids with counterflow or with transversely-counterflow, or with counterflow-angular washing of their heat-exchange elements by working substance of engine. Between each other heat-exchange elements are installed with interfacial gaps for washing of their external heat-exchange surfaces by working substance of engine. Heat-exchange elements of heat-exchange solids are arranged as rotary with angular speed providing for quite intensive break-off of working substance elements from their heat-exchange surfaces ("backs"), which are external relative to axis of rotation, and simultaneously providing for quite intensive "discharge" of working substance elements both from side heat-exchange surfaces, and from "bellies" of heat-exchange surfaces.

EFFECT: direct-flow motion of engine working substance via recuperator makes it possible to reduce hydraulic losses, and arrangement of heat-exchange bodies as aerodynamically profiled creates a ventilator effect, which in combination with spent gases heat regeneration makes it possible to increase engine efficiency.

18 cl, 11 dwg