Airfoil shape for turbine bucket and turbine incorporating same

• US 8,845,296 B2
• Filed: 09/19/2011
• Issued: 09/30/2014
• Est. Priority Date: 09/19/2011
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Collier, Matthew Durham, Smith, Paul Kendall, Perry, Jacob Charles II, Puram, Gayathri
• Primary Examiner(s): Look, Edward
• Assistant Examiner(s): DAVIS, JASON GREGORY
• Application Number:
  US13/235,765
• Publication Number:
  US 20130071249A1
• Time in Patent Office: 1,107 Days
• Field of Search: 415/191, 416/223.A, 416/223.B, 416/223.R, 416/243, 416/DIG.2
• US Class Current: 416/243
• 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 2250/74 given by a set or table of xyz-coordinates
• CPC Class Codes: Y10S 416/02 Formulas of curves

Abstract

A turbine bucket is provided including a bucket airfoil having an airfoil shape, the bucket airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1 wherein the Z values are non-dimensional values from 0% to 100% convertible to Z distances in inches by multiplying the Z values by a height of the airfoil in inches and adding the radius of the airfoil base, and wherein X and Y 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.

Claims

1. A turbine bucket including a bucket airfoil having an airfoil shape, the bucket airfoil having a nominal profile substantially in accordance with Cartesian coordinate values of X, Y and Z set forth in Table 1 wherein the Z values are non-dimensional values from 0% to 100% convertible to Z distances in inches by multiplying the Z values by a height of the airfoil in inches and adding the radius of the airfoil base, and wherein X and Y 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. The turbine bucket according to claim 1, forming part of a stage of a turbine.

3. The turbine bucket according to claim 1, wherein the airfoil shape lies in an envelope within +/−

5% in a direction normal to any airfoil surface location.

4. The turbine bucket according to claim 1, wherein a height of the turbine bucket is about 10 inches to about 40 inches.

5. A turbine bucket including a bucket 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 1 wherein the Z values are non-dimensional values from 0% to 100% convertible to Z distances in inches by multiplying the Z values by a height of the airfoil in inches and adding the radius of the airfoil base, and wherein X and Y are distances in inches which, when connected by smooth continuing arcs, define airfoil profile sections at each Z distance, the 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 the same constant or number to provide a scaled-up or scaled-down airfoil.

6. The turbine bucket according to claim 5, forming part of a stage of a turbine.

7. The turbine bucket according to claim 5, wherein the suction-side airfoil shape lies in an envelope within +/−

5% in a direction normal to any suction-side airfoil surface location.

8. The turbine bucket according to claim 5, wherein a height of the turbine bucket is about 10 inches to about 40 inches.

9. A turbine comprising a turbine wheel having a plurality of buckets, each of the buckets including 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 1 wherein the Z values are non-dimensional values from 0% to 100% convertible to Z distances in inches by multiplying the Z values by a height of the airfoil in inches and adding the radius of the airfoil base, and wherein X and Y are distances in inches which, when connected by smooth continuing arcs, define the 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.

10. The turbine according to claim 9, wherein the turbine wheel comprises a stage of the turbine.

11. The turbine according to claim 9, wherein X represents a distance parallel to the turbine axis of rotation.

12. The turbine according to claim 9, wherein the airfoil shape lies in an envelope within +/−

5% in a direction normal to any airfoil surface location.

13. A turbine according to claim 9, wherein a height of the turbine bucket is about 10 inches to about 40 inches.

14. A turbine comprising a turbine wheel having a plurality of buckets, each of the buckets including an airfoil having a suction-side airfoil shape, the airfoil having a nominal profile substantially in accordance with suction-side Cartesian coordinate values of X, Y and Z set forth in Table 1 wherein the Z values are non-dimensional values from 0% to 100% convertible to Z distances in inches by multiplying the Z values by a height of the airfoil in inches and adding the radius of the airfoil base, and wherein X and Y are distances in inches which, when connected by smooth continuing arcs, define the airfoil profile sections at each distance Z, the profile sections at the Z distances being joined smoothly with one another to form a complete suction-side airfoil shape.

15. The turbine according to claim 14, wherein the turbine wheel comprises a stage of the turbine.

16. The turbine according to claim 14, wherein X represents a distance parallel to the turbine axis of rotation.

17. The turbine according to claim 14, wherein the suction-side airfoil shape lies in an envelope within +/−

5% in a direction normal to any suction-side airfoil surface location.

18. The turbine according to claim 14, wherein a height of the turbine bucket is about 10 inches to about 40 inches.