Turbine nozzle airfoil profile
The present application provides a turbine nozzle including an airfoil shape. The airfoil shape may have a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I. The Cartesian coordinate values of X, Y and Z are non-dimensional values from 0% to 100% convertible to dimensional distances in inches by multiplying the Cartesian coordinate values of X, Y and Z by a height of the airfoil in inches. The X and Y values, when connected by smooth continuing arcs, define airfoil profile sections at each distance Z. The airfoil profile sections at Z distances may be joined smoothly with one another to form a complete airfoil shape.
1. A turbine nozzle comprising an airfoil shape, the airfoil shape having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I wherein the Cartesian coordinate values of X, Y and Z are non-dimensional values from 0% to 100% convertible to dimensional distances in inches by multiplying the Cartesian coordinate values of X, Y and Z by a height of the airfoil in inches, and wherein X and Y, when connected by smooth continuing arcs, define airfoil profile sections at each distance Z, the airfoil profile sections at Z distances being joined smoothly with one another to form a complete airfoil shape.
2. The turbine nozzle of claim 1 , wherein the turbine nozzle forms part of a stage of a turbine.
3. The turbine nozzle of claim 1 , wherein the turbine nozzle is a fourth stage turbine nozzle.
4. The turbine nozzle of claim 1 , wherein the airfoil shape lies in an envelope within at least one of +/−5% of the X and Y values given in Table 1 and/or +/−5% of a chord length in a direction normal to any airfoil surface location.
5. The turbine nozzle of claim 1 , wherein a height of the turbine nozzle is about 5 inches to about 50 inches in length.
6. The turbine nozzle of claim 1 , wherein the X, Y and Z distances are scalable as a function of a constant or number to provide a scaled-up airfoil and are scalable as a function of the constant or number to provide a scaled-down airfoil.
7. A turbine nozzle comprising an airfoil having a suction-side uncoated nominal airfoil profile substantially in accordance with suction-side Cartesian coordinate values of X, Y and Z set forth in Table I wherein the Cartesian coordinate values of X, Y and Z are non-dimensional values from 0% to 100% convertible to dimensional distances in inches by multiplying the Cartesian coordinate values of X, Y and Z by a height of the airfoil in inches, and wherein X and Y, when connected by smooth continuing arcs, define airfoil profile sections at each Z distance, the airfoil profile sections at the Z distances being joined smoothly with one another to form a complete suction-side airfoil shape, the X, Y and Z distances being scalable as a function of a constant or number to provide a scaled-up airfoil and are scalable as a function of the constant or number to provide a scaled-down airfoil.
8. The turbine nozzle of claim 7 , wherein the turbine nozzle forms part of a stage of a turbine.
9. The turbine nozzle of claim 7 , wherein the turbine nozzle is a fourth stage turbine nozzle.
10. The turbine nozzle of claim 7 , wherein the airfoil shape lies in an envelope within at least one of +/−5% of the X and Y values given in Table 1 and/or +/−5% of a chord length in a direction normal to any airfoil surface location.
11. The turbine nozzle of claim 7 , wherein a height of the turbine nozzle is about 5 inches to about 50 inches in length.
12. A turbine comprising a plurality of turbine nozzles, each of the turbine nozzles comprising an airfoil having an airfoil shape, the airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I wherein the Cartesian coordinate values of X, Y and Z are non-dimensional values from 0% to 100% convertible to dimensional distances in inches by multiplying the Cartesian coordinate values of X, Y and Z by a height of the airfoil in inches, and wherein X and Y, when connected by smooth continuing arcs, define airfoil profile sections at each Z distance, the airfoil profile sections at Z distances being joined smoothly with one another to form a complete airfoil shape.
13. The turbine of claim 12 , wherein the plurality of turbine nozzles forms part of a stage of a turbine.
14. The turbine of claim 12 , wherein the plurality of turbine nozzles comprises a plurality of fourth stage turbine nozzles.
15. The turbine of claim 12 , wherein the airfoil shape lies in an envelope within at least one of +/−5% of the X and Y values given in Table 1 and/or +/−5% of a chord length in a direction normal to any airfoil surface location.
16. The turbine of claim 12 , wherein a height the turbine nozzle is about 5 inches to about 50 inches in length.
17. The turbine of claim 12 , wherein the X, Y and Z distances are scalable as a function of a constant or number to provide a scaled-up airfoil and are scalable as a function of the constant or number to provide a scaled-down airfoil.
18. The turbine of claim 12 , wherein X represents a distance parallel to a turbine axis of rotation.