AXIAL BLOWER OR COMPRESSOR HIGH-RPM IMPELLER Russian patent published in 2009 - IPC F04D29/32 F04D29/38 

FIELD: engines and pumps.

SUBSTANCE: invention relates to aircraft engine production, particularly to blowers and compressors of aircraft gas turbine engines. The proposed axial blower or compressor high-RPM impeller incorporates vanes that feature a complicated 3D shape formed by supersonic aerodynamic profiles in cross sections. Note that cross section profiles of working vane are arranged along its height so that the centers of gravity of the said profiles are located on curvilinear line with an offset towards the front in peripheral part and a camber in its center. The vane front edge features a sweep forward in peripheral part and a camber in its center to compensate for the said sweep back and to rule out origination of a bending-twisting flutter at the impeller rated RPM. Note that the shape of curvilinear line, the centers of gravity of the said working vane profiles are located on, is subject to cubic polynomial.

EFFECT: higher efficiency and increased margin of high RPM blower or compressor gas-dynamic stability with no bending-twisting flutter of impeller vanes.

4 dwg