Ceramic matrix composite component including counterflow channels and method of producing

Patent metadata

Field	Value
Publication number	US-11326470-B2
Application number	US-201916722980-A
Country	US
Kind code	B2
Filing date	Dec 20, 2019
Priority date	Dec 20, 2019
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A ceramic matrix composite (CMC) component and method of fabrication including a plurality of counterflow elongated functional features. The CMC component includes a plurality of longitudinally extending ceramic matrix composite plies forming a densified body and a plurality of elongated functional features formed therein the densified body. Each of the plurality of functional features is configured longitudinally extending and in alignment with the plurality of ceramic matrix composite plies. Each of the plurality of elongated functional features includes an inlet configured in cross-ply configuration. The plurality of elongated functional features are configured to provide a flow of fluid from a fluid source to an exterior of the ceramic matrix composite component. The plurality of functional features are configured in alternating flow configuration.

First claim

What is claimed is:

1. A ceramic matrix composite component, comprising:
a plurality of longitudinally extending ceramic matrix composite plies forming a densified body; and
a plurality of elongated functional features formed therein the densified body,
wherein each of the plurality of elongated functional features comprises a portion that is configured longitudinally extending and in alignment with the plurality of longitudinally extending ceramic matrix composite plies and is disposed between and directly adjacent to two adjacent plies of the plurality of longitudinally extending ceramic matrix composite plies,
wherein each of the plurality of elongated functional features includes at least one of an inlet configured in cross-ply configuration and an outlet configured in cross-ply configuration, the plurality of elongated functional features configured to provide a flow of fluid from a fluid source to an exterior of the ceramic matrix composite component,
wherein the plurality of elongated functional features are configured in alternating flow configuration.

2. The ceramic matrix composite component of claim 1 , wherein the plurality of elongated functional features are enclosed within the densified body.

3. The ceramic matrix composite component of claim 1 , wherein the plurality of elongated functional features comprise a plurality of counterflow cooling channels.

4. The ceramic matrix composite component of claim 3 , wherein the plurality of counterflow cooling channels extend longitudinally from forward to aft relative to a hot gas path flow that the ceramic matrix composite component is exposed to.

5. The ceramic matrix composite component of claim 4 , wherein the plurality of counterflow cooling channels define a plurality of forward flowing fluid flowpaths and a plurality of aft flowing fluid flowpaths in an alternating configuration.

6. The ceramic matrix composite component of claim 1 , wherein a first portion of the plurality of elongated functional features include a forward flowing fluid contained therein, a second portion of the plurality of elongated functional features include an aft flowing fluid contained therein and a third portion of the plurality of elongated functional features include an aft flowing fluid contained therein,
wherein an inlet for the first portion of the plurality of elongated functional features is located proximate the inlet for the third portion of the plurality of elongated functional features such that fluid flow heat pick-up is shared between colder and warmer flowing fluids.

7. The ceramic matrix composite component of claim 1 , wherein the ceramic matrix composite component is a hot gas path turbine component.

8. The ceramic matrix composite component of claim 7 , wherein the hot gas path turbine component is selected from the group consisting of a combustor liner, a blade, a shroud, a nozzle, a nozzle end wall, and a blade platform.

9. The ceramic matrix composite component of claim 1 , wherein the portion of each of the plurality of elongated functional features that is disposed between and directly adjacent to two adjacent plies of the plurality of longitudinally extending ceramic matrix composite plies is disposed between and contacts the two adjacent plies of the plurality of longitudinally extending ceramic matrix composite plies along an entire length of the portion.

10. A ceramic matrix composite component, comprising:
a plurality of longitudinally extending ceramic matrix composite plies forming a densified body;
a first plurality of cooling channels formed therein the densified body and defining an aft flowing fluid flowpath from a fluid source to an exterior of the ceramic matrix composite component, wherein each of the first plurality of cooling channels comprises a portion that is configured longitudinally extending, in alignment with the plurality of longitudinally extending ceramic matrix composite plies, and is disposed between and directly adjacent to two adjacent plies of the plurality of longitudinally extending ceramic matrix composite plies, and each of the first plurality of cooling channels having an inlet configured in cross-ply configuration; and
a second plurality of cooling channels formed therein the densified body and defining a forward flowing fluid flowpath from a fluid source to an exterior of the ceramic matrix composite component, wherein each of the second plurality of cooling channels comprises a portion that is configured longitudinally extending, in alignment with the plurality of longitudinally extending ceramic matrix composite plies, and is disposed between and directly adjacent to two adjacent plies of the plurality of longitudinally extending ceramic matrix composite plies, having an inlet configured in cross-ply configuration,
wherein the first plurality of cooling channels and the second plurality of cooling channels are configured in alternating flow configuration.

11. The ceramic matrix composite component of claim 10 , wherein the first plurality of cooling channels and the second plurality of cooling channels are enclosed within the densified body.

12. The ceramic matrix composite component of claim 10 , wherein each of the first plurality of cooling channels and the second plurality of cooling channels further includes a fluid outlet.

13. The ceramic matrix composite component of claim 10 , wherein a first portion of the first plurality of cooling channels includes a forward flowing fluid contained therein, a second portion of the second plurality of cooling channels includes an aft flowing fluid contained therein and a third portion of the second plurality of cooling channels includes an aft flowing fluid contained therein, wherein an inlet for the first portion of the first plurality of cooling channels is located proximate the inlet for the third portion of the second plurality of cooling channels such that fluid flow heat pick-up is shared between colder and warmer flowing fluids.

14. The ceramic matrix composite component of claim 10 , wherein the ceramic matrix composite component is a hot gas path turbine component.

15. The ceramic matrix composite component of claim 14 , wherein the hot gas path turbine component is selected from the group consisting of a combustor liner, a blade, a shroud, a nozzle, a nozzle end wall, and a blade platform.

16. The ceramic matrix composite component of claim 10 , wherein the portion of the first plurality of cooling channels that is disposed between and directly adjacent to two adjacent plies of the plurality of longitudinally extending ceramic matrix composite plies is disposed between and contacts the two adjacent plies of the plurality of longitudinally extending ceramic matrix composite plies.

17. A method of forming a ceramic matrix composite (CMC) product the method comprising:
forming a CMC preform comprising a matrix precursor, a plurality of longitudinally extending reinforcing fibers, and a plurality of sacrificial fibers, wherein each of the plurality of longitudinally extending sacrificial fibers has a portion that is disposed between and directly adjacent to two adjacent reinforcing fibers of the plurality of longitudinally extending reinforcing fibers;
performing one of:
removing the plurality of sacrificial fibers such that a plurality of elongated functional features are formed along the CMC preform in a counterflow configuration; or
applying a fluid infiltrant to the CMC preform thereby densifying the CMC preform, and

performing the other of:
removing the plurality of sacrificial fibers such that a plurality of elongated

Assignees

• Gen Electric

Inventors

• Dyson Thomas Earl
• Decesare Douglas Glenn
• Sun Changjie

Classifications

• C04B35/565

  based on silicon carbide · CPC title

• F05D2300/2261

  of silicon · CPC title

• C04B35/80 Primary

  Fibres, filaments, whiskers, platelets, or the like · CPC title

• F05D2240/11

  Shroud seal segments · CPC title

• F01D11/08

  for sealing space between rotor blade tips and stator (specially-shaped blade tips therefor F01D5/20) · CPC title