High pressure turbine dirt blocker

Patent metadata

Field	Value
Publication number	US-2023184139-A1
Application number	US-202117551685-A
Country	US
Kind code	A1
Filing date	Dec 15, 2021
Priority date	Dec 15, 2021
Publication date	Jun 15, 2023
Grant date	—

Abstract

A dirt blocker including a support structure disposed within a gas turbine engine, the support structure defining an upstream control volume proximate a forward portion of the gas turbine engine and a downstream control volume proximate an aft portion of the gas turbine engine, the downstream control volume being opposite the upstream control volume relative to the support structure, a flow passage formed through the support structure, the flow passage configured to fluidly couple the upstream control volume with the downstream control volume; a radial contact wall formed from the support structure in fluid communication with the upstream control volume, the radial contact wall configured to intercept debris entrained within cooling air within the gas turbine engine; and a stagnation zone fluidly coupled with the flow passage, the stagnation zone configured to reduce momentum of the debris.

First claim

What is claimed is:

1 . A dirt blocker comprising:
a support structure disposed within a gas turbine engine, said support structure defining an upstream control volume proximate a forward portion of the gas turbine engine and a downstream control volume proximate an aft portion of the gas turbine engine, said downstream control volume being opposite said upstream control volume relative to said support structure, a flow passage formed through said support structure, said flow passage configured to fluidly couple said upstream control volume with said downstream control volume; a radial contact wall extending from said support structure in fluid communication with said upstream control volume, said radial contact wall configured to intercept debris entrained within cooling air within said gas turbine engine; and a stagnation zone fluidly coupled with said flow passage, said stagnation zone configured to reduce momentum of said debris.

2 . The dirt blocker according to claim 1 , further comprising:
a debris wall coupled to said support structure proximate an upstream side, said debris wall being fluidly coupled to a bore formed between said radial contact wall and said debris wall, said bore in fluid communication with said flow passage.

3 . The dirt blocker according to claim 2 , further comprising an aft facing slot in fluid communication with said bore.

4 . The dirt blocker according to claim 3 , wherein said aft facing slot is fluidly coupled with said stagnation zone.

5 . The dirt blocker according to claim 1 , further comprising an impingement wall coupled to said support structure at a downstream side, said impingement wall configured to intercept debris entrained in said cooling air.

6 . The dirt blocker according to claim 1 , wherein said impingement wall intersects a centerline of said flow passage, where cooling air flow discharging said flow passage impinges said impingement wall.

7 . The dirt blocker according to claim 1 , wherein said support structure is disposed within a portion of a high pressure turbine section.

8 . A dirt blocker for a high pressure turbine comprising:
a support structure disposed within said high pressure turbine, said support structure defining an upstream control volume proximate a forward portion of the high pressure turbine and a downstream control volume proximate an aft portion of the high pressure turbine, said downstream control volume being opposite said upstream control volume relative to said support structure; a flow passage formed through said support structure, said flow passage configured to fluidly couple said upstream control volume with said downstream control volume; a radial contact wall unitary with said support structure in fluid communication with said upstream control volume, said radial contact wall configured to intercept debris entrained within cooling air within said gas turbine engine; and a stagnation zone fluidly coupled with said flow passage, said stagnation zone configured to reduce momentum of said debris.

9 . The dirt blocker for a high pressure turbine according to claim 8 , further comprising:
a debris wall formed from said support structure proximate an upstream side, said debris wall being fluidly coupled to a bore formed between said radial contact wall and said debris wall, said bore in fluid communication with said flow passage.

10 . The dirt blocker for a high pressure turbine according to claim 8 , further comprising an impingement wall coupled to said support structure at a downstream side, said impingement wall configured to intercept debris entrained in said cooling air.

11 . The dirt blocker for a high pressure turbine according to claim 8 , wherein said impingement wall intersects a centerline of said flow passage, wherein cooling air flow discharging said flow passage impinges said impingement wall.

12 . The dirt blocker for a high pressure turbine according to claim 11 , wherein said impingement wall comprises multiple, discrete arc segments, individually aligned with the centerline.

13 . The dirt blocker for a high pressure turbine according to claim 8 , wherein said stagnation zone is located in either said upstream control volume or said downstream control volume.

14 . A process for removing debris entrained in a gas turbine engine cooling air flow comprising:
flowing cooling air through the gas turbine engine; bisecting a portion of said gas turbine engine with a support structure disposed within said gas turbine engine, said support structure defining an upstream control volume proximate a forward portion of the gas turbine engine and a downstream control volume proximate an aft portion of the gas turbine engine, said downstream control volume being opposite said upstream control volume relative to said support structure; forming a flow passage through said support structure, said flow passage configured to fluidly couple said upstream control volume with said downstream control volume; forming a radial contact wall unitary with said support structure in fluid communication with said upstream control volume, said radial contact wall configured to intercept debris entrained within cooling air within said gas turbine engine; and forming a stagnation zone fluidly coupled with said flow passage, said stagnation zone configured to reduce momentum of said debris.

15 . The process of claim 14 , further comprising:
forming a debris wall unitary with said support structure proximate an upstream side; and fluidly coupling said debris wall to a bore formed between said radial contact wall and said debris wall, said bore in fluid communication with said flow passage.

16 . The process of claim 14 , further comprising:
an impingement wall coupled to said support structure at a downstream side; and intercepting debris entrained in said cooling air with said impingement wall.

17 . The process of claim 16 , wherein said impingement wall intersects a centerline of said flow passage, wherein cooling air flow discharging said flow passage impinges said impingement wall.

18 . The process of claim 14 , further comprising:
locating said stagnation zone in said upstream control volume.

19 . The process of claim 14 , further comprising:
locating said stagnation zone in said downstream control volume.

20 . The process of claim 19 , further comprising:
forming raised features as extended material raised from the upstream side of the support structure adjacent to the flow passage.

Assignees

• Raytheon Tech Corp

Inventors

• Mccaffrey Michael G
• King Christopher

Classifications

• F05D2260/607

  Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles · CPC title

• F01D25/12 Primary

  Cooling · CPC title

• B01D45/08

  by impingement against baffle separators · CPC title

• F01D9/041

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

• F01D5/186

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