Trench cooling of airfoil structures

Patent metadata

Field	Value
Publication number	US-2016369633-A1
Application number	US-201414901450-A
Country	US
Kind code	A1
Filing date	Jul 3, 2014
Priority date	Jul 3, 2013
Publication date	Dec 22, 2016
Grant date	—

Abstract

An airfoil comprises at least one wall defining a leading edge, a trailing edge, a pressure side extending between the leading edge and the trailing edge, and a suction side extending between the leading edge and the trailing edge. The airfoil is curved in three dimensions and has one or more cavities defined by an interior surface of the at least one wall. A plurality of cooling film holes extending between the cavity and at least one cooling trench located on at least one of the pressure side and the suction side, spaced from the leading edge. The at least one trench has a floor spaced from an outer surface of the airfoil. The plurality of cooling film holes extend through the floor at an angle other than perpendicular.

First claim

What is claimed is:

1 . An airfoil, comprising:
at least one wall defining a leading edge, a trailing edge, a pressure side 38 extending between said leading edge and said trailing edge, and a suction side extending between said leading edge and said trailing edge; said airfoil curved in three dimensions; at least one interior cavity defined by an interior surface of said at least one wall; a plurality of cooling film holes extending between said at least one interior cavity and at least one cooling trench located on at least one of said pressure side and said suction side, spaced from said leading edge; said at least one cooling trench having a floor spaced from an outer surface 31 of said airfoil; said plurality of holes extending through said floor at an angle other than perpendicular.

2 . The airfoil of claim 1 , further wherein said floor extends between first and second walls.

3 . The airfoil of claim 1 , wherein said airfoil is one of a turbine blade, a turbine nozzle vane, a compressor blade and a compressor vane.

4 . The airfoil of claim 1 , wherein said at least one cooling trench extends linearly between a first end and a second end.

5 . The airfoil of claim 1 , wherein said at least one cooling trench extends curvilinearly between a first end and a second end.

6 . The airfoil of claim 1 further comprising at least one second cooling trench extending between adjacent airfoils.

7 . The airfoil of claim 6 , said at least one second cooling trench disposed in an outer band or an inner band.

8 . The airfoil of claim 1 , said trench having first and second walls.

9 . The airfoil of claim 8 , said first and second walls extending from said floor.

10 . The airfoil of claim 9 , said first and second walls being vertical.

11 . The airfoil of claim 9 , said first and second walls being perpendicular to said floor.

12 . The airfoil of claim 9 , said first and second walls being at an angle to said floor.

13 . The airfoil of claim 9 , said first and second sidewall being curvilinear.

14 . The airfoil of claim 1 , said at least one cooling trench disposed on said suction side.

15 . The airfoil of claim 1 , said at least one cooling trench disposed on said pressure side.

Assignees

• Gen Electric

Inventors

• Chan George Joe-Kueng
• Bunker Ronald Scott
• Correia Victor Hugo Silva
• Hoffman Christopher Kanoa

Classifications

• F01D5/187 Primary

  Convection cooling · CPC title

• F05D2220/32

  in gas turbines · CPC title

• F04D29/542

  Bladed diffusers (fixing blades to stators F01D9/042) · CPC title

• F01D9/041

  using blades (F01D5/148 takes precedence) · CPC title

• F01D25/12

  Cooling · CPC title