AIRFOIL PROFILE FOR A SECOND STAGE TURBINE NOZZLE

• US 20100172752A1
• Filed: 01/02/2009
• Published: 07/08/2010
• Est. Priority Date: 01/02/2009
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company), Holland Bloorview Kids Rehabilitation Hospital
• Original Assignee: Holland Bloorview Kids Rehabilitation Hospital
• Inventors: McGovern, Kevin T., Smith, Bruce, Poth, Leissner F.
• Granted Patent: US 8,133,016 B2
• Time in Patent Office: Days
• US Class Current: 415/208.100
• CPC Class Codes: F01D 9/041 using blades F01D5/148 takes precedence
• CPC Class Codes: F05D 2240/301 Cross-sectional characteristics
• CPC Class Codes: F05D 2250/74 given by a set or table of xyz-coordinates

Abstract

Second-stage nozzles have vanes including airfoil profiles substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at the radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values. The X, Y and Z values may be scaled as a function of the same constant or number to provide a scaled-up or scaled-down airfoil section for the nozzle.

Claims

1. A turbine nozzle having a nozzle vane in the shape of an airfoil in an envelope within ±

0.100 inches in a direction normal to any airfoil surface location wherein the airfoil has an uncoated nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at a radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil shape.

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

3. A turbine nozzle having a nozzle vane in the shape of an airfoil having an uncoated nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at a radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil profile;

the X, Y and Z values being scaled as a function of the same constant or number to provide a scaled-up or scaled-down vane airfoil.

4. A turbine nozzle according to claim 3 forming part of a second stage of a turbine.

5. A turbine comprising a turbine nozzle having a plurality of vanes, each of said vanes being in the shape of an airfoil in an envelope within ±

0.100 inches in a direction normal to any vane airfoil surface location wherein the airfoil has an uncoated nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at a radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil shape.

6. A turbine according to claim 5 wherein the turbine nozzle comprises a second stage of the turbine.

7. A turbine according to claim 5 wherein the turbine nozzle stage has forty-eight vanes.

8. A turbine comprising a turbine nozzle having a plurality of vanes, each of said vanes being in the shape of an airfoil having an uncoated nominal airfoil profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in inches in Table I with the X, Y and Z values commencing at the radially innermost aerodynamic section of the airfoil and then made relative to that section for the Z coordinate values, the profiles at the Z distances being joined smoothly with one another to form the complete airfoil shape;

the X, Y and Z values being scaled as a function of the same constant or number to provide a scaled-up or scaled-down vane airfoil.

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

10. A turbine according to claim 8 wherein the turbine nozzle stage has forty-eight vanes.