Airfoil Shape for a Turbine Rotor Blade

Patent metadata

Field	Value
Publication number	US-2018328178-A1
Application number	US-201715594704-A
Country	US
Kind code	A1
Filing date	May 15, 2017
Priority date	May 15, 2017
Publication date	Nov 15, 2018
Grant date	—

Abstract

A turbine rotor blade is provided including an airfoil having 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 are distances in inches which, 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.

First claim

What is claimed is:

1 . A turbine rotor blade 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 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 are distances in inches which, 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 rotor blade as in claim 1 , forming part of a stage of a turbine.

3 . The turbine rotor blade as in claim 1 , wherein the turbine rotor blade forms a part of a third stage of turbine rotor blades of a turbine of a gas turbine.

4 . The turbine rotor blade as in claim 1 , wherein the airfoil shape lies in an envelope within +/−5% in a direction normal to any airfoil surface location.

5 . The turbine rotor blade as in claim 1 , wherein a height of the turbine rotor blade is 10 inches to 40 inches.

6 . A turbine rotor blade including 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 are distances in inches which, 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 the same constant or number to provide a scaled-up or scaled-down airfoil.

7 . The turbine rotor blade as in claim 6 , forming part of a stage of a turbine.

8 . The turbine rotor blade as in claim 6 , wherein the turbine rotor blade forms a part of a third stage of turbine rotor blades of a turbine of a gas turbine.

9 . The turbine rotor blade as in claim 6 , wherein the suction-side airfoil shape lies in an envelope within +/−5% in a direction normal to any suction-side airfoil surface location.

10 . The turbine rotor blade as in claim 6 , wherein a height of the turbine rotor blade is about 10 inches to about 40 inches.

11 . A turbine comprising a turbine wheel having a plurality of turbine rotor blades, each of the turbine rotor blades 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 I wherein the Cartesian coordinate values of X, Y and Z are non-dimensional values from 0% to 100% convertible to dimensional distances by multiplying the Cartesian coordinate values of X, Y and Z by a height of the airfoil, and wherein X and Y are distances which, 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.

12 . The turbine as in claim 11 , wherein the turbine wheel comprises a stage of the turbine.

13 . The turbine as in claim 11 , wherein X represents a distance parallel to the turbine axis of rotation.

14 . The turbine as in claim 11 , wherein the suction-side airfoil shape lies in an envelope within +/−5% in a direction normal to any suction-side airfoil surface location.

15 . The turbine as in claim 11 , wherein a height of the turbine rotor blade is about 10 inches to about 40 inches.

16 . The turbine as in claim 11 , wherein each of the turbine rotor blades includes an airfoil having a pressure-side airfoil shape, the airfoil having a nominal profile substantially in accordance with pressure-side Cartesian coordinate values of X, Y and Z set forth in Table I wherein the pressure-side Cartesian coordinate values of X, Y and Z are non-dimensional values from 0% to 100% convertible to dimensional distances by multiplying the pressure-side Cartesian coordinate values of X, Y and Z by a height of the airfoil, and wherein X and Y are distances which, 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.

17 . The turbine as in claim 16 , wherein the turbine rotor blade is a third stage turbine rotor blade.

18 . The turbine as in claim 14 , wherein X represents a distance parallel to the turbine axis of rotation.

19 . The turbine as in claim 16 , wherein the airfoil shape lies in an envelope within +/−5% in a direction normal to any airfoil surface location.

20 . The turbine as in claim 16 , wherein a height of the turbine rotor blade is about 10 inches to about 40 inches.

Assignees

• Gen Electric

Inventors

• Brozyna Lee Larned
• Jones Mark Andrew
• Lutz Matthew
• Jayana Srinivasa Govardhan

Classifications

• F01D5/141 Primary

  Shape, i.e. outer, aerodynamic form (F01D5/148 - F01D5/20 take precedence; blade construction F01D5/147) · CPC title

• F05D2250/74

  given by a set or table of xyz-coordinates · CPC title

• Y02T50/60

  Efficient propulsion technologies, e.g. for aircraft · CPC title

• Y02E20/16

  Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT] · CPC title