Turbine airfoil segment having film cooling hole arrangement

Patent metadata

Field	Value
Publication number	US-2016160656-A1
Application number	US-201514957731-A
Country	US
Kind code	A1
Filing date	Dec 3, 2015
Priority date	Dec 8, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

A turbine airfoil segment includes inner and outer platforms that are joined by at least one airfoil. The airfoil includes leading and trailing edges that are joined by spaced apart first and second sides to provide an exterior airfoil surface. At least one of the inner and outer platforms includes film cooling holes that have external breakout points that are located in substantial conformance with the Cartesian coordinates set forth in Table 1 for the inner platform or Table 2 for the outer platform. The Cartesian coordinates are provided by an axial coordinate, a circumferential coordinate, and a radial coordinate, relative to a zero-coordinate. The film cooling holes have a diametrical surface tolerance relative to the specified coordinates of 0.20 inches (5.0 mm).

First claim

What is claimed is:

1 . A turbine airfoil segment comprising:
inner and outer platforms that are joined by at least one airfoil, the at least one airfoil includes leading and trailing edges that are joined by spaced apart first and second sides to provide an exterior airfoil surface, and at least one of the inner and outer platforms includes film cooling holes that have external breakout points that are located in substantial conformance with the Cartesian coordinates set forth in Table 1 for the inner platform or Table 2 for the outer platform, the Cartesian coordinates provided by an axial coordinate, a circumferential coordinate, and a radial coordinate, relative to a zero-coordinate, and the film cooling holes have a diametrical surface tolerance relative to the specified coordinates of 0.20 inches (5.0 mm).

2 . The turbine airfoil segment as recited in claim 1 , wherein the external breakout points of the film cooling holes of the outer platform are located in substantial conformance with the Cartesian coordinates set forth in Table 1 and the external breakout points of the film cooling holes of the inner platform are located in substantial conformance with the Cartesian coordinates set forth in Table 2.

3 . The turbine airfoil segment as recited in claim 2 , wherein the film cooling holes are conical holes.

4 . The turbine airfoil segment as recited in claim 1 , wherein spacing between edges of adjacent cooling holes is at least 0.015 inch (0.38 mm).

5 . The turbine airfoil segment as recited in claim 1 , wherein the film cooling holes have a diameter of 0.010-0.035 inch (0.25-0.89 mm).

6 . A gas turbine engine comprising:
a compressor section; a combustor fluidly connected to the compressor section; a turbine section fluidly connected to the combustor, the turbine section includes an array of turbine airfoil segments, each turbine airfoil segment comprising:
inner and outer platforms that are joined by at least one airfoil, the at least one airfoil includes leading and trailing edges that are joined by spaced apart first and second sides to provide an exterior airfoil surface, and at least one of the inner and outer platforms includes film cooling holes that have external breakout points that are located in substantial conformance with the Cartesian coordinates set forth in Table 1 for the inner platform or Table 2 for the outer platform, the Cartesian coordinates provided by an axial coordinate, a circumferential coordinate, and a radial coordinate, relative to a zero-coordinate, and the film cooling holes have a diametrical surface tolerance relative to the specified coordinates of 0.20 inches (5.0 mm).

7 . The gas turbine engine as recited in claim 6 , wherein the external breakout points of the film cooling holes of the outer platform are located in substantial conformance with the Cartesian coordinates set forth in Table 1 and the external breakout points of the film cooling holes of the inner platform are located in substantial conformance with the Cartesian coordinates set forth in Table 2.

8 . The gas turbine engine as recited in claim 7 , wherein the film cooling holes are conical holes.

9 . The gas turbine engine as recited in claim 6 , wherein spacing between edges of adjacent cooling holes is at least 0.015 inch (0.38 mm).

10 . The gas turbine engine as recited in claim 6 , wherein the film cooling holes have a diameter of 0.010-0.035 inch (0.25-0.89 mm).

Assignees

• United Technologies Corp

Inventors

• Bergman Russell J
• Moran Jason B
• Ennacer Mohammed

Classifications

• F01D5/147

  Construction, i.e. structural features, e.g. of weight-saving hollow blades (F01D5/148, F01D5/16 and F01D5/20 take precedence; blade shape F01D5/141; blades with cooling or heating channels or cavities F01D5/18; heating, heat-insulating or cooling means on blades F01D5/18) · CPC title

• F02C7/18

  the medium being gaseous, e.g. air {(F02C7/125 takes precedence)} · CPC title

• F01D5/186 Primary

  Film cooling (F01D5/187 takes precedence) · CPC title

• F05D2250/232

  conical · CPC title

• F05D2240/81

  Cooled platforms · CPC title