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US 2011/0217178 A1Published application
Turbine airfoil having outboard and inboard sections
AssigneeSiemens Energy, Inc.
InventorsStefan Mazzola, John J. Marra
Life of this patent
Estimating the term…
Abstract
A turbine airfoil usable in a turbine engine and formed from at least an outboard section and an inboard section such that an inner end of the outboard section is attached to an outer end of the inboard section. The outboard section may be configured to provide a tip having adequate thickness and may extend radially inward from the tip with a generally constant cross-sectional area. The inboard section may be configured with a tapered cross-sectional area to support the outboard section.
Claims17
A turbine airfoil, comprising:
- a generally elongated airfoil formed from an outer wall, and having a leading edge, a trailing edge, a pressure side, a suction side, a root at a first end of the airfoil and a tip at a second end opposite to the first end;
- wherein the airfoil is formed from an outboard section and an inboard section such that an inner end of the outboard section is attached to an outer end of the inboard section;
- wherein the outboard section has a generally non-tapered cross-sectional area, and the inboard section has a tapered cross-sectional area.
A turbine airfoil, comprising:
- a generally elongated hollow airfoil formed from an outer wall, and having a leading edge, a trailing edge, a pressure side, a suction side, a root at a first end of the airfoil and a tip at a second end opposite to the first end, and a cooling system positioned within interior aspects of the generally elongated hollow airfoil;
- wherein the airfoil is formed from an outboard section and an inboard section such that an inner end of the outboard section is attached to an outer end of the inboard section;
- wherein the outboard section has a generally non-tapered cross-sectional area, and the inboard section has a tapered cross-sectional area.
A turbine airfoil, comprising:
- a generally elongated hollow airfoil formed from an outer wall, and having a leading edge, a trailing edge, a pressure side, a suction side, a root at a first end of the airfoil and a tip at a second end opposite to the first end, and a cooling system positioned within interior aspects of the generally elongated hollow airfoil;
- wherein the airfoil is formed from an outboard section and an inboard section such that an inner end of the outboard section is attached to an outer end of the inboard section;
- wherein the outboard section has a generally non-tapered cross-sectional area, and the inboard section has a tapered cross-sectional area;
- and
- wherein the outboard and inboard sections are formed at least in part by different materials having similar chemistry and differing in specific composition.
2 more elements
Dependencies are inferred from the claim text.