Airfoil shape for a turbine nozzle

• US 6,722,853 B1
• Filed: 11/22/2002
• Issued: 04/20/2004
• Est. Priority Date: 11/22/2002
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Hafner, Matthew Troy, Fehlberg, James B., Humanchuk, David John
• Primary Examiner(s): Look, Edward K.
• Assistant Examiner(s): McCoy, Kimya N
• Application Number:
  US10/301,724
• Time in Patent Office: 515 Days
• Field of Search: 416/243, 416/DIG.2, 416/DIG.5, 416/223.A, 415/191, 415/210.1
• US Class Current: 416/223.00A
• 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: F05D 2250/20 Three-dimensional
• CPC Class Codes: F05D 2250/70 Shape
• CPC Class Codes: Y10S 416/02 Formulas of curves

Abstract

The second stage nozzle has an airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I wherein X and Y values are in inches and define airfoil profile sections at each distance Z and Z is a non-dimensional value from 0 to 1 convertible to Z distances in inches by multiplying the Z values of Table I by a height of the airfoil in inches. The profile sections at the Z distances are joined smoothly with one another to form a complete airfoil shape. The X and Y distances may be scalable to provide a scaled-up or scaled-down airfoil for the nozzle. The nominal airfoil given by the X, Y and Z distances lies within an envelope of ±0.100 inches.

Claims

1. A turbine nozzle including an airfoil having an airfoil shape, said airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I wherein the Z values are non-dimensional values from 0 to 1 convertible to Z distances in inches by multiplying the Z values of Table I by a height of the airfoil in inches, and wherein the X and Y values are distances in inches which, when connected by smooth continuing arcs, define airfoil profile sections at each distance Z, the profile sections at the Z distances being joined smoothly with one another to form a complete airfoil shape.

2. A turbine nozzle according to claim 1 forming part of a second stage of a turbine.

3. A turbine nozzle according to claim 1 wherein the airfoil has a root radius of 22.345 inches and a height of 4.309 inches, said nozzle comprising part of a second stage of a turbine.

4. A turbine nozzle according to claim 1 wherein said airfoil shape lies in an envelope within ±

0.100 inches in a direction normal to any airfoil surface location.

7. A turbine nozzle according to claim 4 wherein the airfoil has a root radius of 22.345 inches and a height of 4.309 inches, said nozzle comprising part of a second stage of a turbine.

5. A turbine nozzle including an airfoil having an uncoated nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I wherein the Z values are non-dimensional values from 0 to 1 convertible to Z distances in inches by multiplying the Z values of Table I by a height of the airfoil in inches, and wherein the X and Y values are distances in inches which, when connected by smooth continuing arcs, define airfoil profile sections at each distance Z, the profile sections at the Z distances being joined smoothly with one another to form a complete airfoil shape, the X, Y and Z distances being scalable as a function of the same constant or number to provide a scaled-up or scaled-down airfoil.

6. A turbine nozzle according to claim 5 forming part of a second stage of a turbine.

8. A turbine comprising a turbine stage having a plurality of nozzles, each of said nozzles including an airfoil having an airfoil shape, said airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table I wherein the Z values are non-dimensional values from 0 to 1 convertible to Z distances in inches by multiplying the Z values of Table I by a height of the airfoil in inches, and wherein X and Y values are distances in inches which, when connected by smooth continuing arcs, define airfoil profile sections at each distance Z, the profile sections at the Z distances being joined smoothly with one another to form a complete airfoil shape.

9. A turbine according to claim 8 wherein the turbine nozzle comprises part of a second stage of the turbine.

10. A turbine according to claim 8 wherein the turbine stage has 32 nozzles and coordinate value Y extends parallel to an axis of rotation of the turbine.

11. A turbine according to claim 8 wherein each of the airfoils has a root radius of 22.345 inches and a height of 4.309 inches, said turbine nozzle comprising a part of a second stage of the turbine.

12. A turbine according to claim 8 wherein said airfoil shape lies in an envelope within ±

0.100 inches in a direction normal to any airfoil surface location.