Structure for extracting compressed air from compressor of gas turbine engine and gas turbine engine with the structure

Patent metadata

Field	Value
Publication number	US-9291099-B2
Application number	US-201113696781-A
Country	US
Kind code	B2
Filing date	May 6, 2011
Priority date	May 10, 2010
Publication date	Mar 22, 2016
Grant date	Mar 22, 2016

Abstract

Provided is a structure of a gas turbine engine for extracting a part of compressed air generated by a compressor. The structure comprises a cylindrical housing having an annular portion extending around the compressing chamber to define an annular chamber, an annular partition dividing the annular chamber into first and second plenum chambers. The cylindrical housing has first apertures to communicate between the compressing chamber and the first plenum chamber. The partition has second apertures to communicate between the first and second plenum chambers. The first and second apertures are configured so that that the first apertures have a first total cross-sectional area and the second apertures have a second total cross-sectional area which is smaller than the first total cross-sectional area.

First claim

The invention claimed is:

1. A structure of a gas turbine engine for extracting a part of compressed air generated by a compressor, comprising:
a cylindrical housing extending around an axis and forming therein at least a part of a compressing chamber in which air is flowed in a direction parallel to the axis as the air is compressed to generate the compressed air, the cylindrical housing having
an annular portion extending around the compressing chamber to define an annular chamber,
an annular partition dividing the annular chamber into an annular first plenum chamber and an annular second plenum chamber positioned on an upstream side of the first plenum chamber with respect to the direction and separated from the annular first plenum chamber,
the cylindrical housing further having a plurality of first apertures defined therethrough to communicate between the compressing chamber and said annular first plenum chamber;
the annular partition having a plurality of second apertures defined therethrough to communicate between the annular first and second plenum chambers, the plurality of first apertures and the plurality of second apertures being configured so that the plurality of first apertures have a first total cross-sectional area and the plurality of second apertures have a second total cross-sectional area which is smaller than the first total cross-sectional area;
the annular second plenum chamber being in fluid communication with a second extracting passage for extracting the compressed air from the annular second plenum chamber.

2. The structure of claim 1 , wherein the annular first plenum chamber is in fluid communication with a first extracting passage for extracting the compressed air from the annular first plenum chamber.

3. The structure of claim 2 , wherein the first extracting passage has a valve provided therein for closing the first extracting passage.

4. The structure of claim 1 , wherein the cylindrical housing has a first housing portion and a second housing portion positioned on an upstream side of the first housing portion, the first and second housing portions having opposed first and second radially extending mating surfaces, respectively, which mate with each other in a sealing engagement when the first and second housing portions are assembled with each other, each aperture of the plurality of first apertures being defined by a recess, the recess comprising either respective recesses in the first and second mating surfaces or a single recess formed in one of the first and second mating surfaces, the first and second mating surfaces having annular first and second recesses defined therein, respectively, to form the annular chamber when the first and second housing portions are assembled with each other.

5. The structure of claim 4 , wherein the second housing portion is made of a plurality of housing segments, each housing segment of the plurality of housing segments having respective annular chamber portions forming a part of the annular chamber when the plurality of housing segments are assembled with each other, each of the respective annular chamber portions having inner and outer peripheral guides forming continuous annular inner and outer guides when the plurality of housing segments are assembled with each other, the annular partition being made of a plurality of partition segments, the plurality of partition segments being assembled to the plurality of housing segments with inner and outer peripheral edges thereof being guided by the inner and outer guides, respectively.

6. A gas turbine engine, comprising:
a compressor for compressing air to generate compressed air;
a combustor for combusting the compressed air with fuel to generate a high pressure combustion gas; and
a turbine for rotating a rotor by using the combustion gas;
the compressor having a cylindrical housing extending around an axis and forming therein at least a part of a compressing chamber in which air is flowed in a direction parallel to the axis as the air is compressed to generate the compressed air, the cylindrical housing having
an annular portion extending around the compressing chamber to define an annular chamber,
an annular partition dividing the annular chamber into an annular first plenum chamber and an annular second plenum chamber positioned on an upstream side with respect to the direction and separated from the annular first plenum chamber,
the cylindrical housing having a plurality of first apertures defined therethrough to communicate between the compressing chamber and the annular first plenum chamber;
the partition having a plurality of second apertures defined therethrough to communicate between the annular first and second plenum chambers, the plurality of first apertures and the plurality of second apertures being configured so that the plurality of first apertures have a first total cross-sectional area and the plurality of second apertures have a second total cross-sectional area which is smaller than the first total cross-sectional area;
the annular second plenum chamber being in fluid communication with a second extracting passage for extracting the compressed air from the annular second plenum chamber.

7. The gas turbine engine of claim 6 , wherein the annular first plenum chamber is in fluid communication with a first extracting passage for extracting the compressed air from the annular first plenum chamber.

8. The gas turbine engine of claim 7 , wherein the first extracting passage has an on-off valve provided therein for closing the first extracting passage.

9. The gas turbine engine of claim 6 , wherein the cylindrical housing has a first housing portion and a second housing portion positioned on an upstream side of the first housing portion, the first and second housing portions having opposed first and second radially extending mating surfaces, respectively, which mate with each other in a sealing engagement when the first and second housing portions are assembled with each other, each aperture of the plurality of first apertures being defined by a recess, the recess comprising either respective recesses in the first and second mating surfaces or a single recess formed in one of the first and second mating surfaces, the first and second mating surfaces having annular first and second recesses defined therein, respectively, to form the annular chamber when the first and second housing portions are assembled with each other.

10. The gas turbine engine of claim 9 , wherein the second housing portion is made of a plurality of housing segments, each housing segment of the plurality of housing segments having respective annular chamber portions forming a part of the annular chamber when the plurality of housing segments are assembled with each other, each of the respective annular chamber portions having inner and outer peripheral guides forming continuous annular inner and outer guides when the plurality of housing segments are assembled with each other, the annular partition being made of a plurality of partition segments, the plurality of partition segments being assembled to the plurality of housing segments with inner and outer peripheral edges thereof being guided by the inner and outer guides, respectively.

Assignees

• Sakai Yusuke
• Ikeguchi Takuya
• Terauchi Koji
• Kawasaki Heavy Ind Ltd

Inventors

• Sakai Yusuke
• Ikeguchi Takuya
• Terauchi Koji

Classifications

• F04D27/0215

  Arrangements therefor, e.g. bleed or by-pass valves · CPC title

• F04D27/0207

  by bleeding, bypassing or recycling fluids (influencing the boundary layer by an uncontrolled bleeding of the working fluid F04D29/681) · CPC title

• F02C6/08 Primary

  the gas being bled from the gas-turbine compressor · CPC title

• F02C9/18

  by bleeding, bypassing or acting on variable working fluid interconnections between turbines or compressors or their stages {(F02C3/113 takes precedence)} · CPC title

• F04D29/522

  especially adapted for elastic fluid pumps · CPC title