US 12,313,078 B2Granted

Extraction impeller for axial compressor

AssigneeGE Infrastructure Technology LLC

InventorsMoorthi Subramaniyan, Navaneeth Kishan T R

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Abstract

An extraction impeller for an axial compressor includes first vanes having an elongated S-shape arranged on the surface of an impeller body. The first vanes extend radially from an outer flow inlet edge of the body to a flow outlet hub centered on the surface at the rotation axis. A radially inner end of each of the first vanes connects at the flow outlet hub in a direction perpendicular to a rotation axis. Second vane(s) are arranged between adjacent first vanes, and third vanes are arranged between second vanes and between first vanes and second vanes. Second vanes are radially longer than third vanes. The impeller extracts air from the axial compressor and forms an axial flow with reduced vortex whistle. When used in an axial compressor of a gas turbine system, the impeller reduces flow unsteadiness.

Claims25

Dependent claims

An extraction impeller for an axial compressor, the extraction impeller comprising:

a body having a rotation axis and a surface perpendicular to the rotation axis;
a plurality of first vanes having an elongated S-shape arranged on the surface, the plurality of first vanes extending radially from an outer flow inlet edge of the body to a flow outlet hub centered on the surface at the rotation axis, wherein a radially inner end of each of the plurality of first vanes connect at the flow outlet hub in a direction perpendicular to the rotation axis, and wherein the flow outlet hub centered on the surface at the rotation axis has a multi-pointed star shape with each point thereof coupled to the radial inner end of a respective first vane of the plurality of first vanes;
a plurality of second vanes arranged on the surface, at least one of the plurality of second vanes between adjacent first vanes;
and
a plurality of third vanes arranged on the surface between any adjacent second vanes and between adjacent first vanes and second vanes,
wherein the at least one of the plurality of second vanes is radially longer than the plurality of third vanes.

3 more elements

A compressor wheel for an axial compressor, the compressor wheel comprising:

a wheel body for coupling to a rotor;
a plurality of rotating blades coupled to the main wheel body for compressing air flow in a compressed air passage;
and
an extraction impeller coupled to the wheel body and in fluid communication with the compressed air passage, the extraction impeller including:
an impeller body having a rotation axis and a surface perpendicular to the rotation axis;
a plurality of first vanes having an elongated S-shape arranged on the surface, the plurality of first vanes extending radially from an outer flow inlet edge of the impeller body to a flow outlet hub centered on the surface at the rotation axis, wherein a radially inner end of each of the plurality of first vanes connect at the flow outlet hub in a direction perpendicular to the rotation axis, and wherein the flow outlet hub centered on the surface at the rotation axis has a multi-pointed star shape with each point thereof coupled to the radial inner end of a respective first vane of the plurality of first vanes;
a plurality of second vanes arranged on the surface, at least one of the plurality of second vanes between adjacent first vanes;
and
a plurality of third vanes arranged on the surface between any adjacent second vanes and between adjacent first vanes and second vanes,
wherein the at least one of the plurality of second vanes is radially longer than the plurality of third vanes.

7 more elements

Dependencies are inferred from the claim text.