Exhaust systems and methods for gas turbine engine

Patent metadata

Field	Value
Publication number	US-10954834-B2
Application number	US-201816057300-A
Country	US
Kind code	B2
Filing date	Aug 7, 2018
Priority date	May 23, 2016
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

Systems and methods for an exhaust system for a gas turbine engine are provided. The method includes: receiving a primary exhaust fluid in a primary manifold; receiving a secondary cooling fluid in a secondary plenum; directing the primary exhaust fluid through a plurality of eductor primary flow paths associated with a respective plurality of ducts spaced circumferentially about a primary manifold, the plurality of eductor primary flow paths extending through the secondary plenum; and mixing the primary exhaust fluid and the secondary cooling fluid in a mixing chamber associated with a respective one of the plurality of ducts to create a mixed fluid flow.

First claim

What is claimed is:

1. A method for attenuating sound generated by a gas turbine engine with an exhaust system, the method comprising:
receiving a primary exhaust fluid in a primary manifold;
receiving a secondary cooling fluid in a secondary plenum;
directing the primary exhaust fluid through a plurality of eductor primary flow paths associated with a respective plurality of ducts spaced circumferentially about a primary manifold, the plurality of eductor primary flow paths extending through the secondary plenum;
mixing the primary exhaust fluid and the secondary cooling fluid in a mixing chamber associated with a respective one of the plurality of ducts to create a mixed fluid flow; and
directing the mixed fluid flow through an opening defined in a first baffle and about a perimeter of a second baffle of a muffler system to define a tortuous path for attenuating the sound generated by the gas turbine engine.

2. The method of claim 1 , wherein directing the mixed fluid flow through the first baffle and about the second baffle further comprises:
directing the mixed fluid flow through the opening of a first torus-shaped baffle and about the perimeter of a second ellipsoid-shaped baffle.

3. The method of claim 1 , further comprising:
directing the mixed fluid flow through a respective diffuser section associated with each of the plurality of ducts prior to the directing the mixed fluid flow through the muffler system.

4. The method of claim 1 , wherein receiving the secondary cooling fluid further comprises:
receiving the secondary cooling fluid after the secondary cooling fluid flows through an engine and generator oil cooler.

5. A method for attenuating sound generated by a gas turbine engine with an exhaust system, the method comprising:
receiving a primary exhaust fluid in a primary manifold;
receiving a secondary cooling fluid in a secondary plenum;
directing the primary exhaust fluid through a plurality of eductor primary flow paths associated with a respective plurality of ducts spaced circumferentially about a primary manifold, the plurality of eductor primary flow paths extending through the secondary plenum;
mixing the primary exhaust fluid and the secondary cooling fluid in a mixing chamber associated with a respective one of the plurality of ducts to create a mixed fluid flow; and
directing the mixed fluid flow through an opening defined in a first torus-shaped baffle and about a perimeter of a second baffle of a muffler system to define a tortuous path for attenuating the sound generated by the gas turbine engine.

6. The method of claim 5 , wherein directing the mixed fluid flow through the first torus-shaped baffle and about the second baffle further comprises:
directing the mixed fluid flow through the opening of the first torus-shaped baffle and about the perimeter of a second ellipsoid-shaped baffle.

7. The method of claim 5 , further comprising:
directing the mixed fluid flow through a respective diffuser section associated with each of the plurality of ducts prior to the directing the mixed fluid flow through the muffler system.

8. A method for attenuating sound generated by a gas turbine engine with an exhaust system, the method comprising:
receiving a primary exhaust fluid in a primary manifold;
receiving a secondary cooling fluid in a secondary plenum;
directing the primary exhaust fluid through a plurality of eductor primary flow paths associated with a respective plurality of ducts spaced circumferentially about a primary manifold, the plurality of eductor primary flow paths extending through the secondary plenum;
mixing the primary exhaust fluid and the secondary cooling fluid in a mixing chamber associated with a respective one of the plurality of ducts to create a mixed fluid flow;
directing the mixed fluid flow through a respective diffuser section associated with each of the plurality of ducts; and
directing the mixed fluid flow through an opening defined in a first baffle and about a perimeter of a second baffle of a muffler system to define a tortuous path for attenuating the sound generated by the gas turbine engine.

9. The method of claim 8 , wherein directing the mixed fluid flow through the first baffle and about the second baffle further comprises:
directing the mixed fluid flow through the opening of a first torus-shaped baffle and about the perimeter of a second ellipsoid-shaped baffle.

Assignees

• Honeywell Int Inc

Inventors

• Shin Yoonshik
• Sheoran Yogendra Yogi
• Brown Daniel

Classifications

• F01D25/30 Primary

  Exhaust heads, chambers, or the like · CPC title

• F01N1/083 Primary

  using transversal baffles defining a tortuous path for the exhaust gases or successively throttling exhaust gas flow · CPC title

• F02K1/386

  mixing devices in the jet pipe, e.g. for mixing primary and secondary flow · CPC title

• F05D2220/32

  in gas turbines · CPC title

• F01N3/05

  by means of air, e.g. by mixing exhaust with air (silencers working by addition of air to exhaust F01N1/14; arrangements for the supply of additional air for the thermal or catalytic conversion of noxious components of exhaust F01N3/30) · CPC title