US20080063508A1 - Fan case abradable - Google Patents
Fan case abradable Download PDFInfo
- Publication number
- US20080063508A1 US20080063508A1 US11/517,299 US51729906A US2008063508A1 US 20080063508 A1 US20080063508 A1 US 20080063508A1 US 51729906 A US51729906 A US 51729906A US 2008063508 A1 US2008063508 A1 US 2008063508A1
- Authority
- US
- United States
- Prior art keywords
- shell
- recess
- inlet
- fan case
- abradable material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/08—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator
- F01D11/12—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part
- F01D11/122—Preventing or minimising internal leakage of working-fluid, e.g. between stages for sealing space between rotor blade tips and stator using a rubstrip, e.g. erodible. deformable or resiliently-biased part with erodable or abradable material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
- F02K3/02—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber
- F02K3/04—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type
- F02K3/06—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type with front fan
Definitions
- the invention relates to a fan case for a gas turbine engine having abradable material.
- fan cases are constructed of a metal shell with abradable material encapsulated or bounded by metal surfaces within a recess machined into the metal shell surface. Since the abradable material is relatively soft and fragile, placing the abradable material in the recess between upstream and downstream walls of relatively tough and resilient metal of the shell provides protection. However, this approach is costly in time, labour, and material use, and there is room for improvement.
- the invention provides a fan case, for a gas turbine engine, where the fan case has a hollow tubular metal shell with: a central axis of symmetry; an inlet; an outlet; and peripheral wall about the axis to encompass the tips of a plurality of rotary fan blades, and the shell wall includes an upstream portion defining an annular abradable material recess that extends axially having an upstream end at the shell inlet and a downstream end located upstream from the shell outlet.
- the invention also provides a method of manufacturing a fan case comprising the steps of: fabricating a hollow tubular metal shell having: a central axis of symmetry; an inlet; an outlet; and peripheral wall about the axis to encompass the tips of a plurality of rotary fan blades, the shell wall including an upstream portion defining an annular abradable material recess that extends axially having an upstream end at the shell inlet and a downstream end located upstream from the shell outlet; and filling the recess with abradable material filling said recess and defining an upstream edge of unsupported abradable material radially inward of the shell inlet.
- FIG. 1 is an axial cross-sectional view through a prior art gas turbine engine, showing the various components that are assembled to produce an engine, and an example of a prior art fan case with an encapsulated layer of abradable material.
- FIG. 2 is a detailed axial cross-sectional view through another example of a prior art fan case with an encapsulated layer of abradable material having metal to metal contact in an upstream portion with abradable material recess downstream.
- FIG. 4 is a detailed sectional view of the embodiment shown in FIG. 3 .
- FIG. 5 is an exploded isometric view of the metal fan case shell bounded by front and rear flanges, and showing abradable material tiles removed from the recess in which they are bonded.
- FIG. 6 is a like isometric view of the metal fan case shell showing abradable material tiles installed in the recess.
- FIG. 1 shows an axial cross-section through a turbo-fan gas turbine engine. It will be understood however that the invention is equally applicable to any type of engine with a combustor and turbine section such as a turbo-shaft, a turbo-prop, or auxiliary power units.
- Air intake into the engine passes over fan blades 1 in a fan case 2 and is then split into an outer annular flow through the bypass duct 3 and an inner flow through the low-pressure axial compressor 4 and high-pressure centrifugal compressor 5 .
- Compressed air exits the compressor 5 through a diffuser 6 and is contained within a plenum 7 that surrounds the combustor 8 .
- Fuel is supplied to the combustor 8 through fuel tubes 9 which is mixed with air from the plenum 7 when sprayed through nozzles into the combustor 8 as a fuel air mixture that is ignited.
- a portion of the compressed air within the plenum 7 is admitted into the combustor 8 through orifices in the side walls to create a cooling air curtain along the combustor walls or is used for cooling to eventually mix with the hot gases from the combustor and pass over the nozzle guide vane 10 and turbines 11 before exiting the tail of the engine as exhaust.
- the prior art fan case 2 shown in FIG. 1 has a recessed portion adjacent the tips of the fan blades 1 that includes an encapsulated layer of abradable material 12 and some designs include other impact absorbent materials such as ballistic fabric or mesh and metal honeycomb structures.
- the recess to house the abradable material in the prior art is radially outward of the front flange 13 and the fan case 2 is bolted to the engine with the rear flange 14 . Due to the geometry of the recess, the fan case 2 is generally fabricated by machining the recess from an oversized casting and abradable material 12 is plasma spray coated into the recess.
- FIG. 2 shows another example of a prior art fan case 2 with an enclosed layer of abradable material 12 .
- the upstream tip of the blade 1 is in metal to metal contact with a circumferentially grooved portion of the fan case shell 15 and the blade tips contact the abradable material 12 housed in the recess downstream.
- Metal of the fan case shell 15 axially bounds or encapsulates the relatively softer abradable material 12 upstream and downstream in this prior art example as well.
- FIG. 3 shows an axial cross-section through the fan case 2 according to the invention with the fan case 2 being fabricated with a hollow tubular metal shell 15 having a central axis 16 of symmetry; an inlet surrounded by the front flange 13 ; an outlet surrounded by the rear flange 14 ; and peripheral metal wall 17 about the axis 16 to encompass the tips of the rotary fan blades 1 .
- the shell wall 17 includes an upstream portion defining an annular abradable material recess 18 .
- the recess 18 fully extends axially from it's upstream end at the shell inlet 19 surrounded by the front flange 13 to the downstream end 21 located upstream from the shell outlet 20 surrounded by the rear flange 14 .
- the shell inlet 19 has an inlet diameter and the recess has a recess diameter that is no greater than the inlet diameter.
- the prior art examples shown in FIGS. 1-2 show recess diameters greater than the inlet diameters and hence the abradable material is axially bounded by the metal of the fan case shell 15 in the prior art.
- the recess diameter shown in the embodiment of FIGS. 3-4 is tapered in a downstream direction having a maximum recess diameter at the upstream end of the recess 18 that is equal to the shell inlet diameter and a minimum recess diameter at the downstream end 21 of the recess 18 .
- the abradable material 12 partially or fully fills the recess and an upstream edge 22 of unsupported abradable material 12 radially inward of the shell inlet 19 .
- the shell 15 includes a front flange 13 at the inlet 19 to which an inlet cowl is bolted and a rear flange 14 at the outlet 20 to bolt the fan case 2 to the engine.
- the front flange 13 has an external diameter greater than an external diameter of the rear flange 14 as illustrated with a dashed line parallel to the axis 16 . This feature enables access to use simple metal forming techniques and reduces the need to use relatively expensive metal forging and machining methods of the prior art.
- Fabricating the hollow tubular metal shell 15 can be accomplished with less expensive metal fabrication procedures such as: press forming sheet metal; welding; rolling sheet metal; and spin forming and need not follow the prior art methods of forging the metal shell 15 as a single oversized forging and then machining to remove excess metal material.
- the metal fan case shell 15 may be fabricated with the forwardly open recess 18 and prefabricated molded abradable tiles 23 can slide into the recess 18 to be bonded to the metal shell 15 thereby filling the recess 18 .
- prefabricated molded abradable tiles 23 can slide into the recess 18 to be bonded to the metal shell 15 thereby filling the recess 18 .
- there are four tiles 23 each covering one quarter of the circumference of the recess 18 may be used.
- the axial seam between the tiles 23 may be filled and bonded together to fill the entire recess 18 .
- the molded abradable tiles 23 also have a molded upstream edge 22 of unsupported abradable material 12 that is disposed radially inward of the shell inlet on installation.
- a hollow tubular metal shell 15 is fabricated having: a central axis of symmetry 16 ; an inlet 19 ; an outlet 20 ; and peripheral wall 17 about the axis 16 to encompass the tips of a plurality of rotary fan blades 1 .
- the metal shell wall 17 includes an upstream portion defining an annular abradable material recess 18 that extends axially from the upstream end at the shell inlet 19 to the downstream end 21 located upstream from the shell outlet 20 .
- the recess 18 is filled with abradable material 12 leaving an upstream edge 22 of unsupported abradable material 12 radially inward of the metal shell inlet 19 .
- the step of filling the recess 18 can include molding prefabricated abradable material tiles 23 apart from the metal shell 15 and then bonding the tiles 23 into the recess 18 formed in the shell 15 .
Abstract
A fan case and method of manufacturing a fan case, for a gas turbine engine, where the fan case has a hollow tubular metal shell with: a central axis of symmetry; an inlet; an outlet; and peripheral wall about the axis to encompass the tips of a plurality of rotary fan blades, and the shell wall includes an upstream portion defining an annular abradable material recess that extends axially having an upstream end at the shell inlet and a downstream end located upstream from the shell outlet.
Description
- The invention relates to a fan case for a gas turbine engine having abradable material.
- Typically, fan cases are constructed of a metal shell with abradable material encapsulated or bounded by metal surfaces within a recess machined into the metal shell surface. Since the abradable material is relatively soft and fragile, placing the abradable material in the recess between upstream and downstream walls of relatively tough and resilient metal of the shell provides protection. However, this approach is costly in time, labour, and material use, and there is room for improvement.
- Features that distinguish the present invention from the background art will be apparent from review of the disclosure, drawings and description of the invention presented below.
- The invention provides a fan case, for a gas turbine engine, where the fan case has a hollow tubular metal shell with: a central axis of symmetry; an inlet; an outlet; and peripheral wall about the axis to encompass the tips of a plurality of rotary fan blades, and the shell wall includes an upstream portion defining an annular abradable material recess that extends axially having an upstream end at the shell inlet and a downstream end located upstream from the shell outlet.
- The invention also provides a method of manufacturing a fan case comprising the steps of: fabricating a hollow tubular metal shell having: a central axis of symmetry; an inlet; an outlet; and peripheral wall about the axis to encompass the tips of a plurality of rotary fan blades, the shell wall including an upstream portion defining an annular abradable material recess that extends axially having an upstream end at the shell inlet and a downstream end located upstream from the shell outlet; and filling the recess with abradable material filling said recess and defining an upstream edge of unsupported abradable material radially inward of the shell inlet.
- In order that the invention may be readily understood, one embodiment of the invention is illustrated by way of example in the accompanying drawings.
-
FIG. 1 is an axial cross-sectional view through a prior art gas turbine engine, showing the various components that are assembled to produce an engine, and an example of a prior art fan case with an encapsulated layer of abradable material. -
FIG. 2 is a detailed axial cross-sectional view through another example of a prior art fan case with an encapsulated layer of abradable material having metal to metal contact in an upstream portion with abradable material recess downstream. -
FIG. 4 is a detailed sectional view of the embodiment shown inFIG. 3 . -
FIG. 5 is an exploded isometric view of the metal fan case shell bounded by front and rear flanges, and showing abradable material tiles removed from the recess in which they are bonded. -
FIG. 6 is a like isometric view of the metal fan case shell showing abradable material tiles installed in the recess. - Further details of the invention and its advantages will be apparent from the detailed description included below.
-
FIG. 1 shows an axial cross-section through a turbo-fan gas turbine engine. It will be understood however that the invention is equally applicable to any type of engine with a combustor and turbine section such as a turbo-shaft, a turbo-prop, or auxiliary power units. Air intake into the engine passes overfan blades 1 in afan case 2 and is then split into an outer annular flow through thebypass duct 3 and an inner flow through the low-pressure axial compressor 4 and high-pressurecentrifugal compressor 5. Compressed air exits thecompressor 5 through adiffuser 6 and is contained within aplenum 7 that surrounds thecombustor 8. Fuel is supplied to thecombustor 8 throughfuel tubes 9 which is mixed with air from theplenum 7 when sprayed through nozzles into thecombustor 8 as a fuel air mixture that is ignited. A portion of the compressed air within theplenum 7 is admitted into thecombustor 8 through orifices in the side walls to create a cooling air curtain along the combustor walls or is used for cooling to eventually mix with the hot gases from the combustor and pass over thenozzle guide vane 10 and turbines 11 before exiting the tail of the engine as exhaust. - The prior
art fan case 2 shown inFIG. 1 has a recessed portion adjacent the tips of thefan blades 1 that includes an encapsulated layer ofabradable material 12 and some designs include other impact absorbent materials such as ballistic fabric or mesh and metal honeycomb structures. The recess to house the abradable material in the prior art is radially outward of thefront flange 13 and thefan case 2 is bolted to the engine with therear flange 14. Due to the geometry of the recess, thefan case 2 is generally fabricated by machining the recess from an oversized casting andabradable material 12 is plasma spray coated into the recess. -
FIG. 2 shows another example of a priorart fan case 2 with an enclosed layer ofabradable material 12. The upstream tip of theblade 1 is in metal to metal contact with a circumferentially grooved portion of thefan case shell 15 and the blade tips contact theabradable material 12 housed in the recess downstream. Metal of thefan case shell 15 axially bounds or encapsulates the relatively softerabradable material 12 upstream and downstream in this prior art example as well. -
FIG. 3 shows an axial cross-section through thefan case 2 according to the invention with thefan case 2 being fabricated with a hollowtubular metal shell 15 having acentral axis 16 of symmetry; an inlet surrounded by thefront flange 13; an outlet surrounded by therear flange 14; andperipheral metal wall 17 about theaxis 16 to encompass the tips of therotary fan blades 1. - As better seen in the detail of
FIG. 4 , theshell wall 17 includes an upstream portion defining an annular abradable material recess 18. Therecess 18 fully extends axially from it's upstream end at theshell inlet 19 surrounded by thefront flange 13 to thedownstream end 21 located upstream from theshell outlet 20 surrounded by therear flange 14. - The
shell inlet 19 has an inlet diameter and the recess has a recess diameter that is no greater than the inlet diameter. Compared to the prior art examples shown inFIGS. 1-2 , the prior art examples show recess diameters greater than the inlet diameters and hence the abradable material is axially bounded by the metal of thefan case shell 15 in the prior art. - The recess diameter shown in the embodiment of
FIGS. 3-4 is tapered in a downstream direction having a maximum recess diameter at the upstream end of therecess 18 that is equal to the shell inlet diameter and a minimum recess diameter at thedownstream end 21 of therecess 18. Theabradable material 12 partially or fully fills the recess and anupstream edge 22 of unsupportedabradable material 12 radially inward of theshell inlet 19. - The
shell 15 includes afront flange 13 at theinlet 19 to which an inlet cowl is bolted and arear flange 14 at theoutlet 20 to bolt thefan case 2 to the engine. Of advantage in manufacturing, thefront flange 13 has an external diameter greater than an external diameter of therear flange 14 as illustrated with a dashed line parallel to theaxis 16. This feature enables access to use simple metal forming techniques and reduces the need to use relatively expensive metal forging and machining methods of the prior art. Fabricating the hollowtubular metal shell 15 can be accomplished with less expensive metal fabrication procedures such as: press forming sheet metal; welding; rolling sheet metal; and spin forming and need not follow the prior art methods of forging themetal shell 15 as a single oversized forging and then machining to remove excess metal material. - As best seen in
FIGS. 5-6 the metalfan case shell 15 may be fabricated with the forwardlyopen recess 18 and prefabricated moldedabradable tiles 23 can slide into therecess 18 to be bonded to themetal shell 15 thereby filling therecess 18. In the embodiment illustrated there are fourtiles 23 each covering one quarter of the circumference of therecess 18, however various other tile patterns can be used. The axial seam between thetiles 23 may be filled and bonded together to fill theentire recess 18. The moldedabradable tiles 23 also have a moldedupstream edge 22 of unsupportedabradable material 12 that is disposed radially inward of the shell inlet on installation. - As a result of using prefabricated molded
tiles 23 costs may be reduced and a greater variety of materials can be used for theabradable layer 12. Molding of thetiles 23 frees the choice of abradable materials from materials that can be powdered and plasma spray coated to materials that can be molded and then bonded to metal. - Although the use of a particular abradable tile is described and preferred, any suitable abradable provided in any suitable format may be used with the present method and/or apparatus.
- Recapping the process of manufacturing a
fan case 2 in accordance with the invention, the following steps are involved. A hollowtubular metal shell 15 is fabricated having: a central axis ofsymmetry 16; aninlet 19; anoutlet 20; andperipheral wall 17 about theaxis 16 to encompass the tips of a plurality ofrotary fan blades 1. Themetal shell wall 17 includes an upstream portion defining an annular abradable material recess 18 that extends axially from the upstream end at theshell inlet 19 to thedownstream end 21 located upstream from theshell outlet 20. Therecess 18 is filled withabradable material 12 leaving anupstream edge 22 of unsupportedabradable material 12 radially inward of themetal shell inlet 19. - Since the
abradable material 12 can slide into therecess 18 as shown inFIGS. 5-6 , the step of filling therecess 18 can include molding prefabricatedabradable material tiles 23 apart from themetal shell 15 and then bonding thetiles 23 into therecess 18 formed in theshell 15. - Although the above description relates to a specific preferred embodiment as presently contemplated by the inventors, it will be understood that the invention in its broad aspect includes mechanical and functional equivalents of the elements described herein.
Claims (12)
1. A fan case, for a gas turbine engine, comprising:
a hollow tubular metal shell having: a central axis of symmetry; an inlet; an outlet; and peripheral wall about the axis to encompass the tips of a plurality of rotary fan blades, wherein:
the shell wall includes an upstream portion defining an annular abradable material recess that extends axially having an upstream end at the shell inlet and a downstream end located upstream from the shell outlet.
2. A fan case according to claim 1 wherein the shell inlet has an inlet diameter and wherein the recess has a recess diameter that is no greater than the inlet diameter.
3. A fan case according to claim 2 wherein the recess diameter is tapered in a downstream direction having a maximum recess diameter at the upstream end that is equal to the inlet diameter and a minimum recess diameter at the downstream end of the recess.
4. A fan case according to claim 1 including abradable material filling said recess and defining an upstream edge of unsupported abradable material radially inward of the shell inlet.
5. A fan case according to claim 1 wherein the shell includes a front flange at the inlet and a rear flange at the outlet, and wherein the front flange has an external diameter greater than an external diameter of the rear flange.
6. A fan case according to claim 1 including molded abradable tiles bonded to the shell and filling the recess.
7. A fan case according to claim 6 wherein the molded abradable tiles have a molded upstream edge of unsupported abradable material that is disposed radially inward of the shell inlet on installation.
8. A method of manufacturing a fan case comprising the steps of:
fabricating a hollow tubular metal shell having: a central axis of symmetry; an inlet; an outlet; and peripheral wall about the axis to encompass the tips of a plurality of rotary fan blades, the shell wall including an upstream portion defining an annular abradable material recess that extends axially having an upstream end at the shell inlet and a downstream end located upstream from the shell outlet; and
filling the recess with abradable material filling said recess and defining an upstream edge of unsupported abradable material radially inward of the shell inlet.
9. A method of manufacturing according to claim 8 wherein the step of filling the recess includes:
molding prefabricated abradable material tiles apart from the shell; and
bonding said tiles to the recess in the shell.
10. A method of manufacturing according to claim 9 wherein the prefabricated abradable material tiles are molded with an upstream edge of unsupported abradable material for installation radially inward of the shell inlet.
11. A method of manufacturing according to claim 8 wherein the step of fabricating the hollow tubular metal shell consists of metal fabrication procedures selected from the group consisting of: pressing forming sheet metal; welding; rolling sheet metal; spin forming.
12. A method of manufacturing according to claim 8 wherein the step of fabricating the hollow tubular metal shell does not include forging the metal shell as a single oversized forging and then machining to remove excess metal material.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/517,299 US20080063508A1 (en) | 2006-09-08 | 2006-09-08 | Fan case abradable |
CA002600170A CA2600170A1 (en) | 2006-09-08 | 2007-09-04 | Fan case abradable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/517,299 US20080063508A1 (en) | 2006-09-08 | 2006-09-08 | Fan case abradable |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080063508A1 true US20080063508A1 (en) | 2008-03-13 |
Family
ID=39153717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/517,299 Abandoned US20080063508A1 (en) | 2006-09-08 | 2006-09-08 | Fan case abradable |
Country Status (2)
Country | Link |
---|---|
US (1) | US20080063508A1 (en) |
CA (1) | CA2600170A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130343900A1 (en) * | 2012-04-04 | 2013-12-26 | Mtu Aero Engines Gmbh | Process for producing a run-in coating |
WO2014007875A2 (en) | 2012-03-27 | 2014-01-09 | United Technologies Corporation | Gas turbine engine thrust reverser system |
US8672609B2 (en) | 2009-08-31 | 2014-03-18 | United Technologies Corporation | Composite fan containment case assembly |
US20140294574A1 (en) * | 2012-11-21 | 2014-10-02 | Techspace Aero S.A. | Stator Blades of an Axial Turbocompressor and Manufacturing Process |
US9140135B2 (en) | 2010-09-28 | 2015-09-22 | United Technologies Corporation | Metallic radius block for composite flange |
US10876423B2 (en) | 2018-12-28 | 2020-12-29 | Honeywell International Inc. | Compressor section of gas turbine engine including hybrid shroud with casing treatment and abradable section |
CN114423927A (en) * | 2019-09-10 | 2022-04-29 | 赛峰飞机发动机公司 | Attachment of an acoustic shroud to a casing section for an aircraft turbine engine |
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-
2006
- 2006-09-08 US US11/517,299 patent/US20080063508A1/en not_active Abandoned
-
2007
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Patent Citations (11)
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US3656862A (en) * | 1970-07-02 | 1972-04-18 | Westinghouse Electric Corp | Segmented seal assembly |
US4222706A (en) * | 1977-08-26 | 1980-09-16 | Societe Nationale D'etude Et De Construction De Moteurs D'aviation | Porous abradable shroud with transverse partitions |
US4452335A (en) * | 1982-05-03 | 1984-06-05 | United Technologies Corporation | Sound absorbing structure for a gas turbine engine |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8672609B2 (en) | 2009-08-31 | 2014-03-18 | United Technologies Corporation | Composite fan containment case assembly |
US9140135B2 (en) | 2010-09-28 | 2015-09-22 | United Technologies Corporation | Metallic radius block for composite flange |
WO2014007875A2 (en) | 2012-03-27 | 2014-01-09 | United Technologies Corporation | Gas turbine engine thrust reverser system |
EP2831402A4 (en) * | 2012-03-27 | 2015-12-16 | United Technologies Corp | Gas turbine engine thrust reverser system |
US20130343900A1 (en) * | 2012-04-04 | 2013-12-26 | Mtu Aero Engines Gmbh | Process for producing a run-in coating |
US9845685B2 (en) * | 2012-04-04 | 2017-12-19 | Mtu Aero Engines Gmbh | Process for producing a run-in coating |
US20140294574A1 (en) * | 2012-11-21 | 2014-10-02 | Techspace Aero S.A. | Stator Blades of an Axial Turbocompressor and Manufacturing Process |
US10876423B2 (en) | 2018-12-28 | 2020-12-29 | Honeywell International Inc. | Compressor section of gas turbine engine including hybrid shroud with casing treatment and abradable section |
US11421544B2 (en) | 2018-12-28 | 2022-08-23 | Honeywell International Inc. | Compressor section of gas turbine engine including hybrid shroud with casing treatment and abradable section |
CN114423927A (en) * | 2019-09-10 | 2022-04-29 | 赛峰飞机发动机公司 | Attachment of an acoustic shroud to a casing section for an aircraft turbine engine |
Also Published As
Publication number | Publication date |
---|---|
CA2600170A1 (en) | 2008-03-08 |
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