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US 8,944,774 B2Granted
Gas turbine nozzle with a flow fence
AssigneeGeneral Electric Company
InventorCraig Allen Bielek
Life of this patent
Estimating the term…
Abstract
The present application provides a turbine nozzle. The turbine nozzle may include an airfoil with a leading edge and a trailing edge and a flow fence extending from the leading edge to the trailing edge.
Claims17
A turbine nozzle, comprising:
- an airfoil;
- the airfoil comprising a leading edge, a trailing edge, a suction side, and a pressure side;
- and
- a flow fence extending along the suction side comprising:
- a first arcuate surface having a first constant radius of curvature extending from the suction side towards a base of the airfoil;
- and
- a second arcuate surface extending from the suction side towards the first arcuate surface, the second arcuate surface having a second constant radius of curvature that is different than the first constant radius of curvature, wherein the first and second arcuate surfaces converge at a line, thereby forming an edge of the flow fence along the line;
- wherein:
- the flow fence extends from the leading edge to the trailing edge of the airfoil;
- the edge of the flow fence formed by the first and second arcuate surfaces is separated from the suction side a first distance at a position between the leading edge and the trailing edge and at a second distance at the leading edge and the trailing edge;
- and
- the first distance is greater than the second distance;
- wherein the turbine nozzle is a last stage turbine nozzle.
10 more elements
A turbine, comprising:
- a plurality of nozzles;
- and
- a plurality of buckets;
- the plurality of buckets comprising an airfoil;
- the airfoil comprising a suction side, a pressure side, a leading edge, a trailing edge, and a flow fence extending between the leading edge and the trailing edge;
- wherein the flow fence comprises:
- a first arcuate surface having a constant radius of curvature extending from either the suction side or the pressure side of the airfoil;
- a second flat surface extending from either the suction side or the pressure side of the airfoil and converging with the first arcuate surface at a line, such that the first arcuate surface and the second flat surface form an edge of the flow fence along the line of convergence;
- wherein the first arcuate surface is positioned closer to a tip of the airfoil than the second flat surface.
6 more elements
A turbine nozzle airfoil, comprising:
- a leading edge;
- a trailing edge,
- a pressure side;
- a suction side;
- and
- a flow fence extending from along a perimeter of the airfoil, wherein the flow fence comprises:
- a first arcuate surface having a first constant radius of curvature extending from the suction side;
- and
- a second arcuate surface extending from the suction side towards the first arcuate surface, the second arcuate surface having a second constant radius of curvature that is different than the first constant radius of curvature, wherein the first and second arcuate surfaces converge at a line, thereby forming an edge of the flow fence along the line of convergence;
- wherein the edge of the flow fence formed by the first and second arcuate surfaces is separated from the suction side a first distance at a first position between the leading edge and the trailing edge and is separated from the pressure side a second distance at a second position between the leading edge and the trailing edge, the first distance and the second distance being equal;
- the flow fence blends into the leading edge and the trailing edge;
- and
- the turbine nozzle is a last stage turbine nozzle.
10 more elements
Dependencies are inferred from the claim text.