First stage turbine nozzle airfoil

• US 6,736,599 B1
• Filed: 05/14/2003
• Issued: 05/18/2004
• Est. Priority Date: 05/14/2003
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Gill, Randall, Jacks, Curtis John, Bielek, Craig Allen, Coign, Robert Walter
• Primary Examiner(s): VERDIER, CHRISTOPHER M
• Application Number:
  US10/249,870
• Time in Patent Office: 370 Days
• Field of Search: 415/191, 415/192, 415/193, 415/208.1, 415/208.2, 415/209.1, 415/210.1, 415/211.2, 416/223.R, 416/223.A, 416/243, 416/DIG.2, 416/DIG.5
• US Class Current: 415/191
• CPC Class Codes: F01D 5/141 Shape, i.e. outer, aerodynamic form F01D5/148 - F01D5/20 take precedence; blade construction F01D5/147
• CPC Class Codes: F01D 9/02 Nozzles; Nozzle boxes; Stator blades; Guide conduits , e.g. individual nozzles nozzle boxes F01D9/047
• CPC Class Codes: F05D 2200/10 Basic functions
• CPC Class Codes: F05D 2240/128 Nozzles
• CPC Class Codes: F05D 2240/301 Cross-sectional characteristics
• CPC Class Codes: F05D 2250/70 Shape

Abstract

The first stage nozzles have airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth Table 1. The X and Y values are in inches and the Z value is non-dimensional along the nozzle-stacking axis coincident with a turbine radius and convertible to a Z distance in inches from the turbine axis by multiplying the Z value by the height of the airfoil and adding the root radius to the result. The X and Y distances may be scalable as a function of the same constant or number to provide a scaled up or scaled down airfoil section for the nozzle. The nominal airfoil given by the X, Y and Z distances lies within an envelope of ±0.160 inches.

Claims

1. A turbine nozzle comprising an airfoil shape in an envelope within ±

0.160 inches in a direction normal to any airfoil surface location wherein the airfoil comprises a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1, wherein the Z coordinate comprises a nondimensional value along a nozzle stacking line coincident with a radius from a turbine axis of rotation and convertible to a Z distance in inches by multiplying the Z value by a height of the airfoil and adding that product to a root radius of the nozzle, and wherein X and Y comprise distances in inches defining the airfoil profile at each distance Z, the profiles at the Z distances being joined smoothly with one another to form a complete airfoil shape.

2. The turbine nozzle according to claim 1, wherein X and Y comprise distances being scalable as a function of the same constant or number to provide a scaled up or scaled down nozzle airfoil.

3. A turbine nozzle according to claim 1 forming part of a first stage of a turbine.

4. A turbine nozzle according to claim 1, wherein the Z value is measured from an intersection of a nozzle centerline along the radius from the turbine axis and the root radius of a flowpath through the turbine.

5. A turbine nozzle according to claim 1, wherein the root radius of the nozzle airfoil comprises approximately 21.25 inches and the airfoil comprises a height from the root radius of approximately 4.275 inches.

6. A turbine nozzle comprising an airfoil shape with an uncoated nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1, wherein Z comprises a nondimensional value along a nozzle stacking axis coincident with a radius from a turbine axis of rotation and convertible to a Z distance in inches from said turbine axis by multiplying the Z value by a height of the airfoil and adding that product to a root radius of the nozzle, wherein X and Y comprise distances in inches defining the airfoil profile at each distance Z, the profiles at the Z distances being joined smoothly with one another to form a complete airfoil shape.

7. The turbine nozzle according to claim 6, wherein X and Y comprise distances being scalable as a function of the same constant or number to provide a scaled up or scaled down nozzle airfoil.

8. A turbine nozzle according to claim 6 forming part of a first stage of a turbine.

9. A turbine nozzle according to claim 6, wherein the root radius of the nozzle airfoil comprises approximately 21.25 inches and the airfoil comprises a height from the root radius of approximately 4.275 inches.

10. A turbine comprising a nozzle arrangement comprising a plurality of nozzles, with each nozzle comprising an airfoil shape in an envelope within ±

0.160 inches in a direction normal to any airfoil surface location wherein the airfoil comprises a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1, wherein the Z coordinate comprises a nondimensional value along a nozzle stacking axis coincident with a radius from a turbine axis of rotation convertible to a Z distance in inches from said turbine axis by multiplying the Z value by a height of the airfoil and adding that product to a root radius of the nozzle, and wherein the X and Y values comprise distances in inches defining the airfoil profile at each distance Z, the profiles at the Z distances being joined smoothly with one another to form a complete airfoil shape.

11. The turbine according to claim 10, wherein X and Y comprise distances being scalable as a function of the same constant or number to provide a scaled up or scaled down nozzle airfoil.

12. A turbine according to claim 10 wherein the turbine comprises a first stage of a turbine.

13. A turbine according to claim 10, wherein the turbine comprises approximately 32 nozzles and Y represents a distance parallel to the turbine axis of rotation.

14. A turbine according to claim 10, wherein the root radius of the nozzle airfoil comprises approximately 21.25 inches and the airfoil comprises a height from the root radius of approximately 4.275 inches.

15. A turbine comprising a nozzle arrangement comprising a plurality of nozzles, each of said nozzles comprising an uncoated nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1, wherein the Z coordinate comprises a nondimensional value along a nozzle stacking axis coincident with a radius from a turbine axis of rotation convertible to a Z distance in inches from said turbine axis of rotation by multiplying the Z value by a height of the airfoil and adding that product to a root radius of the nozzle, wherein X and Y comprises distances in inches defining the airfoil profile at each distance Z, and the profiles at the Z distances being joined smoothly with one another to form a complete airfoil shape.

16. The turbine according to claim 15, wherein X and Y comprise distances being scalable as a function of the same constant or number to provide a scaled up or scaled down nozzle airfoil.

17. A turbine according to claim 15, wherein the nozzle arrangement comprises a first stage of a turbine.

18. A turbine according to claim 15, wherein the nozzle arrangement comprises approximately thirty two (32) nozzles and Y comprises a distance parallel to the turbine axis of rotation.

19. A turbine according to claim 15, wherein the root radius of the nozzle airfoil comprises approximately 21.25 inches and the airfoil comprises a height from the root radius of approximately 4.275 inches.