Exhaust fume isolator for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-2016341633-A1
Application number	US-201514719159-A
Country	US
Kind code	A1
Filing date	May 21, 2015
Priority date	May 21, 2015
Publication date	Nov 24, 2016
Grant date	—

Abstract

Exhaust ducting for a gas turbine engine includes a lower plenum, an upper plenum, an exhaust fume isolator, and an inner duct seal positioned between the upper plenum and the exhaust fume isolator. The lower plenum is in flow communication with an exhaust collector of the gas turbine engine. The upper plenum is adjacent and in flow communication with the lower plenum. The exhaust fume isolator includes an isolation chamber and mixed exhaust ducting. The isolation chamber is adjacent the upper plenum and in flow communication with the enclosure. The mixed exhaust ducting is in flow communication with the isolation chamber and extends from the isolation chamber to the enclosure exhaust.

First claim

What is claimed is:

1 . A gas turbine engine cell, comprising:
an outer duct including
an outer duct body including
an outer duct first end located within the cell and configured to couple to an inlet of a gas turbine engine, and
an outer duct second end located distal to the outer duct first end and outside of the cell, and

a mixed exhaust port extending through the outer duct body and located within the cell;
an inner duct including
an inner duct body including
an inner duct first end configured to couple to an exhaust collector of the gas turbine engine, and
an inner duct second end located within the outer duct body and distal to the inner duct first end,

an inner duct seal extending from the inner duct body to the outer duct body, the inner duct seal being positioned within the outer duct body between the outer duct second end and the mixed exhaust port, and
an inner duct ring extending outward from the inner duct body towards the outer duct body and forming an air gap with the outer duct body, the inner duct ring being positioned within the outer duct body between the outer duct first end and the mixed exhaust port; and
an exhaust fume isolator including
an isolation chamber adjacent the mixed exhaust port formed between the outer duct and the inner duct by the outer duct body, the inner duct body, the inner duct seal and the inner duct ring, and
mixed exhaust ducting including
a mixed exhaust inlet joined to the outer duct at the mixed exhaust port, and
a mixed exhaust outlet located within an enclosure exhaust of the cell.

2 . The gas turbine engine cell of claim 1 , wherein the exhaust fume isolator includes a plurality of the mixed exhaust ports and the mixed exhaust ducting includes a plurality of the mixed exhaust inlets, one for each of the mixed exhaust ports.

3 . The gas turbine engine cell of claim 2 , wherein the mixed exhaust ducting manifolds to direct a mixed exhaust from the isolation chamber to the mixed exhaust outlet.

4 . The gas turbine engine cell of claim 1 , wherein the mixed exhaust outlet is positioned adjacent a ventilator for the cell, and wherein the ventilator creates a negative pressure within the mixed exhaust ducting.

5 . The gas turbine engine cell of claim 4 , wherein the ventilator is an exhaust fan.

6 . The gas turbine engine cell of claim 1 , wherein the outer duct is joined to a roof of the cell.

7 . The gas turbine engine cell of claim 1 , wherein the inner duct is movable within the outer duct in a telescoping manner to facilitate installation of the gas turbine engine within the cell.

8 . A gas turbine engine cell, comprising:
an enclosure including a roof, an enclosure air inlet, and an enclosure exhaust; a ventilator adjacent the enclosure exhaust; inlet ducting extending out of the enclosure and configured to couple to an inlet of a gas turbine engine; and exhaust ducting including
an outer duct including
an outer duct body extending through the roof, the outer duct body including an outer duct first end located in the enclosure and an outer duct second end located outside of the enclosure, and
a mixed exhaust port extending through the outer duct body,

an inner duct including
an inner duct body including an inner duct first end configured to couple to an exhaust of the gas turbine engine and an inner duct second end positioned within the outer duct body,
an inner duct seal extending from the inner duct body to the outer duct body, the inner duct seal being positioned within the outer duct between the outer duct second end and the mixed exhaust port, and
an inner duct ring extending from the inner duct body towards the outer duct body and forming an air gap with the outer duct body, the inner duct ring being positioned within the outer duct body between the outer duct first end and the mixed exhaust port, and

mixed exhaust ducting extending from the mixed exhaust port to the enclosure exhaust, the mixed exhaust port including a mixed exhaust outlet located adjacent the ventilator.

9 . The gas turbine engine cell of claim 8 , wherein the outer duct body, the inner duct body, the inner duct seal, and the inner duct ring form an isolation chamber where exhaust leakage and enclosure air are mixed prior to being drawn out through the mixed exhaust ducting.

10 . The gas turbine engine cell of claim 9 , wherein the exhaust ducting includes a plurality of the mixed exhaust ports.

11 . The gas turbine engine cell of claim 10 , wherein the mixed exhaust ducting manifolds to direct a mixed exhaust from the isolation chamber to the mixed exhaust outlet.

12 . The gas turbine engine cell of claim 8 , wherein the mixed exhaust ducting includes a mixed exhaust inlet joined to the outer duct body at the mixed exhaust port.

13 . The gas turbine engine cell of claim 8 , wherein the ventilator is an exhaust fan.

14 . The gas turbine engine cell of claim 13 , wherein the outer duct is joined to the roof.

15 . Exhaust ducting for a gas turbine engine cell including an enclosure with an enclosure exhaust, a ventilator, and a gas turbine engine located within the enclosure and including an exhaust collector, the exhaust ducting comprising:
a lower plenum adjacent and in flow communication with the exhaust collector; an upper plenum adjacent and in flow communication with the lower plenum; an exhaust fume isolator including
an isolation chamber adjacent the upper plenum and in flow communication with the enclosure, and
mixed exhaust ducting in flow communication with the isolation chamber, the mixed exhaust ducting extending from the isolation chamber to the enclosure exhaust and terminating adjacent the ventilator; and
an inner duct seal positioned between the upper plenum and the isolation chamber.

16 . The exhaust ducting of claim 15 , wherein the upper plenum is formed by an outer duct and the lower plenum is formed by an inner duct extending partially into the outer duct in a telescoping configuration.

17 . The exhaust ducting of claim 16 , wherein the isolation chamber is located between the outer duct and the inner duct where the outer duct and the inner duct overlap in the telescoping configuration.

18 . The exhaust ducting of claim 17 , further including an inner duct ring positioned within the outer duct and extending from the inner duct towards the outer duct forming an air gap with the outer duct, wherein the isolation chamber is bound on one side by the inner duct seal and is bound on an opposite side by the inner duct ring and the air gap.

19 . The exhaust ducting of claim 16 , further comprising a mixed exhaust port extending through the outer duct adjacent the isolation chamber, and wherein the mixed exhaust ducting includes a mixed exhaust inlet joined to the outer duct at the mixed exhaust port.

20 . The exhaust ducting of claim 15 , wherein the ventilator is an exhaust fan.

Assignees

• Solar Turbines Inc

Inventors

• Ouyang Xing

Classifications

• G01M15/02

  Details or accessories of testing apparatus · CPC title

• G01M15/14 Primary

  Testing gas-turbine engines or jet-propulsion engines · CPC title

• F01D25/30

  Exhaust heads, chambers, or the like · CPC title

• F01D1/00

  Non-positive-displacement machines or engines, e.g. steam turbines (wit working-fluid flows in opposite axial directions for balancing axial thrust F01D3/02; with other than pure rotation F01D23/00; turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor F01K) · CPC title