GAS-TURBINE ENGINE WITH FANS OF OPPOSITE ROTATION, WHICH HAS SCREW GAS GENERATOR WITH POSITIVE FLOW DISPLACEMENT Russian patent published in 2013 - IPC F02K3/72 

FIELD: engines and pumps.

SUBSTANCE: gas-turbine engine with fans of opposite rotation includes, in series and downstream, section of fans of opposite rotation, gas generator with positive displacement of axial flow and low pressure turbine of opposite rotation, which is functionally connected to section of fans of opposite rotation. Gas generator with positive displacement of axial flow represents a high pressure stage with constant displacement of axial flow and includes inlet, core and section of combustion chamber. Inlet is equally spaced in axial direction and located upstream of the outlet. Core includes inner casing located inside outer casing. Inner and outer casings pass from inlet to outlet and have internal and external axes respectively, which are offset. At least one of inner and outer casings has the possibility of being rotated about one of the corresponding internal and external axes. Inner and outer casings have interacting internal and external spiral blades passing around internal and external axes respectively. Internal and external spiral blades pass in radial direction outwards and inwards respectively. Core has the first, the second and the third sections located in series in downward direction and passing between inlet and outlet. At that, internal and external spiral blades have the first, the second and the third spiral bends in the first, the second and the third sections respectively. The first spiral bends are smaller than the second spiral bends, and the third spiral bends are smaller than the second spiral bends. Section of combustion chamber passes downstream in axial direction at least through the area of the second section.

EFFECT: increase in the engine efficiency, reduction of its weight, reduction of costs for manufacture, erection and repair.

10 cl, 19 dwg