Foreign object damage screen for gas turbine system

Patent metadata

Field	Value
Publication number	US-10273881-B2
Application number	US-201615092197-A
Country	US
Kind code	B2
Filing date	Apr 6, 2016
Priority date	Apr 6, 2016
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A system includes a foreign object damage (FOD) screen configured to be disposed upstream of an air intake of a gas turbine engine and to keep debris from entering the air intake. The FOD screen is configured to extend across a fluid flow path extending through the air intake into the gas turbine engine. The FOD screen includes a flexible, woven fabric made of a non-metal material and configured to absorb and dissipate energy from the debris, and the flexible, woven fabric includes a tensile strength ranging between 2700 megapascals (mPa) and 3700 mPa.

First claim

The invention claimed is:

1. A system, comprising:
a foreign object damage (FOD) screen configured to be disposed upstream of an air intake of a gas turbine engine and to keep debris from entering the air intake, wherein the FOD screen is configured to extend across a fluid flow path extending through the air intake into the gas turbine engine, and wherein the FOD screen comprises a flexible, woven fabric made of a non-metal material and configured to absorb and dissipate energy from the debris, and the flexible, woven fabric comprises a tensile strength ranging 2700 megapascals (mPa) and 3700 mPa;
a housing; and
an inlet silencer disposed within the housing;
wherein the FOD screen is coupled to a wall of the housing at a location between the inlet silencer and the air intake, and wherein the flexible, woven fabric of the FOD screen is configured to move axially along a longitudinal axis of the gas turbine engine relative to an axial location of coupling of the FOD screen to the wall located upstream of the gas turbine engine.

2. The system of claim 1 , wherein the flexible, woven fabric comprises a modulus of elasticity ranging between 130 and 180 gigapascals.

3. The system of claim 1 , wherein the flexible, woven fabric comprises a density ranging between 1.40 and 1.45 grams per cubic centimeter.

4. The system of claim 1 , wherein the flexible, woven fabric comprises an open mesh para-aramid synthetic fibers.

5. The system of claim 1 , wherein the FOD screen comprises a rubberized edge disposed along an entire perimeter of the flexible, woven fabric.

6. The system of claim 5 , comprising an attachment mechanism configured to couple the FOD screen to the wall located upstream of the air intake, wherein the attachment mechanism comprises an annular retaining ring, and a plurality of fasteners, and wherein the rubberized edge is partially disposed about the annular retaining ring between the wall and the annular retaining ring, and each fastener of the plurality of fasteners is disposed through the wall, the rubberized edge, and the annular retaining ring to couple the FOD screen to the wall.

7. A system, comprising:
a gas turbine engine having an engine bell mouth and a nose cone;
a foreign object damage (FOD) screen configured to be disposed upstream of an air intake of the gas turbine engine and to keep debris from entering the air intake, wherein the FOD screen is configured to extend across a fluid flow path extending through the air intake into the gas turbine engine, the FOD screen is secured over and coupled to the engine bell mouth, the FOD screen contacts the nose cone or an extension disposed on the nose cone to increase a surface area of the FOD screen; and wherein the FOD screen comprises an open mesh of para-aramid synthetic fibers.

8. The system of claim 7 , wherein the open mesh of para-aramid synthetic fibers comprises a modulus of elasticity ranging between 130 and 180 gigapascals.

9. The system of claim 7 , wherein the open mesh of para-aramid synthetic fibers comprises a density ranging between 1.40 and 1.45 grams per cubic centimeter.

10. The system of claim 7 , wherein the open mesh of para-aramid synthetic fibers comprises a tensile strength ranging between 2700 megapascals (mPa) and 3700 mPa.

11. The system of claim 7 , comprising a housing with an inlet silencer disposed within the housing, and the FOD screen is coupled to a wall of the housing at a location between the inlet silencer and the air intake.

12. The system of claim 7 , wherein the FOD screen comprises a rubberized edge disposed along an entire perimeter of the open mesh of para-aramid synthetic fibers.

13. The system of claim 12 , comprising an attachment mechanism configured to couple the FOD screen to a wall located upstream of the air intake, wherein the attachment mechanism comprises an annular retaining ring, and a plurality of fasteners, and wherein the rubberized edge is partially disposed about the annular retaining ring between the wall and the annular retaining ring, and each fastener of the plurality of fasteners is disposed through the wall, the rubberized edge, and the annular retaining ring to couple the FOD screen to the wall.

14. The system of claim 7 , wherein the open mesh of para-aramid synthetic fibers of the FOD screen is configured to move axially along a longitudinal axis of the gas turbine engine relative to an axial location of coupling of the FOD screen to a wall located upstream of the air intake.

15. A system, comprising:
a housing;
an inlet silencer disposed within the housing;
a foreign object debris (FOD) screen configured to keep debris from entering an air intake of a gas turbine engine, comprising:
an open mesh of para-aramid synthetic fibers; and
a rubberized edge disposed along an entire perimeter of the open mesh of para-aramid synthetic fibers;
wherein the FOD screen is coupled to a wall of the housing at a location between the inlet silencer and the air intake, the open mesh of para-aramid synthetic fibers is configured to extend across a fluid flow path that extends through the air intake into the gas turbine engine, and the rubberized edge is configured to enable coupling of the FOD screen upstream of the air intake, and wherein the open mesh of para-aramid synthetic fibers of the FOD screen is configured to move axially along a longitudinal axis of the gas turbine engine relative to an axial location of coupling of the FOD screen upstream of the air intake.

16. The system of claim 15 , wherein the open mesh of para-aramid synthetic fibers comprises a modulus of elasticity ranging between 130 and 180 gigapascals.

17. The system of claim 16 , wherein the open mesh of para-aramid synthetic fibers comprises a tensile strength ranging between 2700 megapascals (mPa) and 3700 mPa.

18. The system of claim 1 , comprising a gas turbine engine having an engine bell mouth and a nose cone, and the FOD screen is secured over and coupled to the engine bell mouth, and the FOD screen contacts the nose cone or an extension disposed on the nose cone to increase a surface area of the FOD screen.

Assignees

• Gen Electric

Inventors

• Dornier Richard Garland
• Nassar Jason Alan

Classifications

• F05D2300/433

  Polyamides, e.g. NYLON · CPC title

• F05D2300/6012

  Woven fabrics · CPC title

• B64D33/02

  of combustion air intakes · CPC title

• F05D2300/431

  Rubber · CPC title

• Y02T50/672

  Cross-Sectional Technologies · mapped topic