WO2015015128A1 - Ventilation d'un equipement électronique de turbomachine - Google Patents
Ventilation d'un equipement électronique de turbomachine Download PDFInfo
- Publication number
- WO2015015128A1 WO2015015128A1 PCT/FR2014/052002 FR2014052002W WO2015015128A1 WO 2015015128 A1 WO2015015128 A1 WO 2015015128A1 FR 2014052002 W FR2014052002 W FR 2014052002W WO 2015015128 A1 WO2015015128 A1 WO 2015015128A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wall
- equipment
- outlet
- flow
- air
- Prior art date
Links
- 238000009423 ventilation Methods 0.000 title claims description 44
- 238000000034 method Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 63
- 239000012080 ambient air Substances 0.000 description 4
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D33/00—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/08—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of power plant cooling systems
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2230/00—Manufacture
- F05D2230/80—Repairing, retrofitting or upgrading methods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- the present invention relates to an electronic turbine engine equipment, this equipment being for example an onboard computer of the EEC type (acronym for Electronic Engine Control).
- An aircraft turbomachine comprises at least one computer or onboard computer of the EEC type which in particular makes it possible to control actuators of the engine in order to optimize the performance of the turbomachine (FR-B1-2 960 912).
- This computer is generally mounted with other equipment (gearbox AGB (Accessory Gear Box), exchangers, etc.) in the annular space inside the nacelle of the turbomachine, the temperature of the air flow in this space can be relatively large in operation.
- the nacelle comprises an air intake scoop for air supply of the annular space of the nacelle, this air being then evacuated by an air outlet grille of the nacelle.
- This aeration is almost non-existent and the natural convection in the annular space of the nacelle may be insufficient to ensure the ventilation of its equipment.
- the EEC computer includes a housing inside which electronic boards are mounted. These electronic boards have a low temperature resistance which forces the housing to be ventilated with a dedicated system comprising means for withdrawing air flowing outside the nacelle of the turbomachine.
- the computer case is covered by a wall which defines channels for passage of a ventilation air flow, the inputs of which are connected by a manifold to the above-mentioned means for extracting air, and the outlets open on the outer surface of the wall.
- the heat dissipated by the electronic boards in operation is absorbed by the flow of ventilation air flowing in the channels, this air flow then leaving the channels to be discharged into the annular space of the nacelle.
- the heat absorbed by the ventilation airflow is greater (about twice as much) as the heat dissipated by the electronic boards. This is because the ventilation airflow absorbs not only the heat dissipated by the electronic boards but also the heat of the ambient air prevailing in the annular space of the nacelle. In fact, the ventilation channels are separated from this ambient air by the wall of the computer, this ambient air transferring heat by convection to the wall, which is then absorbed by the flow of ventilation air flowing through the channels. ventilation.
- the ventilation system of a computer of the aforementioned type must therefore be currently oversized, for example by greatly increasing the flow of ventilation air, to be sure that the computer is ventilated optimally. Moreover, even with such a system, the thermal margins on the computer can remain reduced with a strong impact on the reliability of the electronic cards.
- the other equipment of the nacelle does not necessarily include dedicated ventilation systems and therefore undergo the thermal environment of the nacelle.
- the active ventilation of the EEC computer generates a tangential vortex in the annular space of the nacelle, which brings heat from the AGB and other hot springs to heat sensitive equipment, which is problematic.
- the present invention provides in particular a simple, effective and economical solution to at least some of these problems.
- the invention proposes an electronic turbomachine equipment, comprising a wall whose inner surface defines at least one channel of passage of a ventilation air flow whose outlet opens on an outer surface of the wall for the evacuation of the ventilation air flow to the outside of the equipment, characterized in that it comprises , at this outlet, means for deflecting and / or guiding at least a portion of the exhaust air flow, on at least a portion of said outer surface of the wall.
- the flow of ventilation air leaving the equipment is deflected and / or guided to scan the equipment and thus improve its ventilation.
- This air flow circulates on the wall of the equipment comprising or defining the outlet of the channel, and thus limits the heating of this wall by the flow of ambient air around the equipment. This also reduces the temperature of the channel output. It is therefore possible to either increase the thermal margins on the computer by about ten degrees or to reduce the ventilation rate by maintaining the previous margins.
- thermal margin is understood to mean the difference between the manufacturer's specification defining the maximum admissible thermal resistance and a measurement made on a real motor or in the laboratory.
- the equipment according to the invention is for example an onboard computer of the EEC type and comprises a housing comprising electronic boards, said wall covering the housing.
- the deflection and / or guiding means may comprise at least one insert and attached to the wall and / or the equipment, for example by gluing, soldering, welding, etc.
- This or organs may be metallic, plastic or composite.
- the outlet of the channel is formed by a slot, the deflection means and / or guide comprising at least one sheet which extends along the slot and covers at least partially .
- the slot may be formed in the wall of the equipment or may be defined, in the mounting position of the wall, between a peripheral edge of this wall and an edge opposite the housing of the equipment.
- the sheet is at least partly inclined relative to the plane of the wall, at an angle of, for example, between 30 and 60 °. This range of values makes it possible to limit the pressure drops of the ventilation air flow.
- the sheet may comprise a portion parallel to the plane of the wall.
- the sheet may extend at least partly inside the channel. The sheet can be folded or stamped.
- the equipment according to the invention may comprise a second wall, opposite to said first wall, the inner surface of this second wall also defining at least one passage channel of a ventilation air flow whose outlet opens onto a surface external of this second wall.
- this outlet is devoid of guide and / or deflection means of the aforementioned type, so that the direction of the air flow discharged by this outlet is substantially opposite to that of the air flow discharged by the outlet of the first wall.
- the present invention also relates to a turbomachine, characterized in that it comprises at least one equipment as described above.
- the turbomachine may include two such equipment, such as two EEC computers.
- the invention also relates to a kit for modifying an electronic turbine engine equipment, with a view to improving its ventilation, characterized in that it comprises means for deflecting and / or guiding an air flow, such as that at least one sheet, intended to be reported and fixed on the equipment, at the outlet of a passage channel of a ventilation air flow of the equipment, so that a Ventilation airflow flows on an external surface of the equipment.
- This kit allows simple and fast modification of existing electronic equipment to improve its ventilation, which is more economical than replacing the complete equipment with another.
- the invention also relates to a method for modifying an electronic turbine engine equipment, with a view to improving its ventilation, characterized in that it comprises the steps of report and fix on the equipment means for deflecting and / or guiding an air flow, such as at least one sheet, on the equipment, at the outlet of a passage channel of a ventilation airflow from the equipment, so that a flow of ventilation air circulates on an external surface of the equipment.
- the invention relates to a method for ventilating a turbomachine nacelle, this nacelle defining an annular space in which are mounted equipment including one as described above (of the type comprising a first and a second wall), characterized in that it consists in ventilating a circumferential portion of the annular space with the flow of air discharged through the outlet of the first wall and the remaining circumferential portion of the annular space with the flow of air discharged through the outlet of the second wall.
- FIG. 1 is a partial schematic view of an aircraft turbomachine, this turbomachine being equipped with a ventilation system of an onboard computer of the EEC type
- FIG. 2 is a schematic perspective view of the on-board computer of the turbine engine of FIG. 1,
- FIG. 3 is a schematic sectional view of the onboard computer of FIG. 2, and represents the prior art to the invention
- FIG. 4 is a diagrammatic perspective view in section along the line IV-IV of FIG. 3;
- FIG. 5 is a diagrammatic sectional view of an on-board computer according to the invention.
- FIG. 6 is a partial schematic sectional view of an on-board computer according to the invention, and represents a first embodiment of the invention
- FIG. 7 is an enlarged view of part of FIG. 6,
- FIGS. 8 and 9 are views corresponding to FIG. 7 and showing variant embodiments of the invention.
- FIG. 10 is a very schematic cross-sectional view of a turbomachine nacelle according to the prior art.
- FIG. 1 showing an aircraft turbine engine 10, such as a turbofan engine.
- This turbomachine typically comprises a nacelle 12 surrounding a motor (not visible) which comprises from upstream to downstream (from right to left in FIG. 1), in the direction of flow of the gases in the turbomachine, a fan, stages of compression, a combustion chamber, turbine stages and an exhaust nozzle.
- the nacelle 12 comprises at its upstream end an air inlet sleeve 14 and defines an annular space between an inner surface formed by an inner casing 16 and an outer surface formed by covers 17.
- Electronic equipment and modules such as that a computer 18 of EEC (Electronic Engine Control) type are mounted in this annular space.
- the air flow contained in the annular space of the nacelle 12 is relatively hot.
- the computer 18, which comprises electronic cards having a low thermal resistance, must therefore be ventilated by a system 20 drawing cooler air flowing along the nacelle.
- the air taken has a temperature of between 0 and 55 ° C when the engine is on the ground.
- the system 20 comprises a conduit 22 for supplying the air taken from the housing 24 of the computer, which comprises channels 26, 26 'for passage of ventilation air flow.
- the housing 24 of the computer comprises one or more digital inputs and one or more digital outputs. It has a generally parallelepipedal shape and comprises an upper wall 28 and a bottom or bottom wall 29 ( Figure 4) which each cover and define a plurality of channels 26, 26 '. In the example shown in FIG. 4, the channels 26, 26 'are rectilinear and parallel, and are separated from each other by rectilinear fins 33
- the channels 26 may have a common air outlet in the form of an elongated slot, as shown in FIGS. 2 and 4.
- the airflow leaving the channels 26 has a temperature which is generally not greater than 90 ° C, while the air flow contained in the annular space may have a temperature greater than 100 ° C.
- the invention proposes to deflect and / or guide at least a portion of the air flow leaving the housing (arrow 35 ') so that a flow of air circulates on the surface. external 34 of the wall 28 (arrow 40).
- This air flow 40 is thus reused to ventilate the computer 18 from the outside, by allowing convection heat exchange (arrow 38 ') with the wall 28.
- the air flow 40 thus protects the wall 28 of the airflow 36 by "screen effect".
- outlet 32 of the channels 26 is also in the form of an elongated rectilinear slot.
- a deflection and guide plate 50 is here attached and fixed to the wall 28, for example by gluing, brazing or welding.
- the sheet 50 has a generally elongated shape and extends along the outlet 32. It has a length at least equal to that of the outlet 32. In addition, it has a width or transverse dimension greater than that of the outlet and cover completely while allowing the evacuation of the ventilation air flow between the sheet and the wall.
- the sheet 50 has a cross sectional shape and comprises two longitudinal portions 52, 54 adjacent inclined relative to each other.
- a first longitudinal portion 52 has a longitudinal edge 56 connected to a longitudinal edge of the outlet 32, and extends outwardly of the housing 24 by being inclined relative to the plane P of the wall.
- the portion 52 of the sheet is inclined at an angle ⁇ of between 30 and 60 °, and for example 45 °, relative to the plane P.
- This first portion 52 covers a portion of the width or transverse dimension of the outlet 32.
- FIG. 8 differs from the embodiment described in the foregoing essentially in that the sheet 50 'comprises only a part 52, and therefore no part 54. Due to the absence of the part 54, the flow of air leaving the channels 26 (arrow 40 ') has an orientation which depends on the angle of inclination of the portion 52 relative to the plane P, this angle being here of the order of 45 °.
- two members 60, 62 are attached and fixed in the outlet of the channels 26.
- the first member is a sheet 60 which has a rectilinear elongated shape and a longitudinal edge 64 of which is connected to a longitudinal edge of the outlet 32, this sheet 60 being inclined with respect to the plane P of the wall 28 and extending towards the The interior of the outlet 32 of the channels 26.
- the sheet 60 has a length less than or equal to that of the outlet 32 and has a width or transverse dimension less than that of the outlet.
- the sheet 60 has for example a width between 1/4 and 1/3 of that of the output. Furthermore, the height h "of the sheet 60 is between 1/3 and 1/2 of that of the channels 26.
- the sheet 60 extends towards the inside of the At the outlet, it slightly reduces the outlet section of the channels 26 and thus makes it possible to accelerate the flow of air at the outlet thereof
- the sheet 60 is inclined at an angle ⁇ of between 30 and 60 °, and by 45 ° example, relative to the plane P.
- the outer surface of the sheet 60 defines a guide surface of the air flow leaving the channels 26.
- the second member is an elongated bar 62 having a triangular section.
- This bar 62 is fixed by one of its sides 66 on the wall 28 or on the housing, along the outlet 32, so that another 68 of the sides of the bar forms a guide surface of the flow of air leaving the channels 26, which is substantially parallel to the sheet 60.
- the bar 62 has a length less than or equal to that of the outlet 32, a width or transverse dimension between 1/4 and 1/3 of that of the outlet 32, and a height H between 1/2 and 2/3 of that of the channels 26.
- the flow of air leaving the channels 26 has an orientation that depends on the angle of inclination of the guide surfaces of the plate 60 and the bar 62 relative to the plane P, this angle being here of the order of 45 °.
- FIGS. 10 and 11 represents schematically a cross-sectional view of a turbomachine nacelle.
- this nacelle defines an internal annular space in which are mounted several equipment.
- the references 70, 72, 74 and 76 respectively denote exchangers, an AGB gearbox, a pressure acquisition box (PSS), and fans connected to two EEC 18 computers, these fans being intended to suck the air flowing outside the nacelle in the conduit 22 above.
- the reference 78 designates the pylon of the turbomachine and finally the reference 80 designates an air evacuation grid of the internal space of the nacelle.
- FIG 10 shows the prior art to the present invention. It can be seen that the air flows 82 leaving the ventilation channels defined by the wall 28 and the bottom wall 29 of each computer 18 are oriented substantially in the same tangential direction, which generates a vortex 84 in the annular space, which brings heat from of the AGB gearbox 72 and the exchangers 70, to the fans 76 and the PSS 74 housing.
- the invention makes it possible to remedy this problem by virtue of the fact that the air flows 82 ', 82 "leaving the ventilation channels defined by the wall 28 and the bottom wall 29 of each Computer 18 are now oriented in substantially opposite tangential directions This is made possible by the fact that means for deflecting and / or guiding an air flow as described in the foregoing are mounted at the outlet of the channels. passing a ventilation air flow of only one of the faces of each computer 18.
- the output of the channels defined by the bottom wall (radially inner wall) of each computer is not modified, the flow of air leaving the channels defined by the wall of each computer being deflected and / or guided, as described above.
- the air flow 82 'leaving the channels defined by the bottom wall of each computer 18 are moving in a pa
- the air flow 82 "coming out of the channels defined by the wall of each computer 18 circulates in the remainder of the nacelle to ventilate firstly, in order to ventilate the housing PSS 74, then are evacuated by the grid 80.
- the fan 76 then pass around the exchangers 70 and the gearbox 72 before being evacuated by the grid 80.
- the annular space of the nacelle thus comprises two zones, a relatively cold in which are located the computers EEC 18 and a relatively hot one in which the gearbox 72 is located.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1601451.6A GB2531217B (en) | 2013-08-01 | 2014-07-31 | Ventilation of a piece of equipment of a turbomachine |
US14/908,336 US9945249B2 (en) | 2013-08-01 | 2014-07-31 | Ventilation of a piece of electronic equipment of a turbomachine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1357673A FR3009340B1 (fr) | 2013-08-01 | 2013-08-01 | Ventilation d'un equipement de turbomachine |
FR1357673 | 2013-08-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015015128A1 true WO2015015128A1 (fr) | 2015-02-05 |
Family
ID=49546567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2014/052002 WO2015015128A1 (fr) | 2013-08-01 | 2014-07-31 | Ventilation d'un equipement électronique de turbomachine |
Country Status (4)
Country | Link |
---|---|
US (1) | US9945249B2 (fr) |
FR (1) | FR3009340B1 (fr) |
GB (1) | GB2531217B (fr) |
WO (1) | WO2015015128A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2587669A (en) * | 2019-10-02 | 2021-04-07 | Advanced Mobility Res And Development Ltd | Systems and methods for aircraft |
US11512640B2 (en) * | 2020-02-12 | 2022-11-29 | General Electric Company | Gas turbine module ventilation system having a controllable baffle vane |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2879564A1 (fr) * | 2004-12-20 | 2006-06-23 | Airbus France Sas | Agencement d'entree d'air de ventilation a element d'obturation mobile |
US20090175718A1 (en) * | 2007-12-31 | 2009-07-09 | Carlos Diaz | System and method for passive cooling of gas turbine engine control components |
US20110186263A1 (en) * | 2008-07-31 | 2011-08-04 | Airbus Operations Gmbh | Heat exchanger for the outer skin of an aircraft |
FR2960912A1 (fr) * | 2010-06-08 | 2011-12-09 | Snecma | Dispositif de protection d'un calculateur de turbo-machine d'aeronef en cas de feu |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3792584A (en) * | 1972-02-16 | 1974-02-19 | Boeing Co | Increased or variable bypass ratio engines |
US4156344A (en) * | 1976-12-27 | 1979-05-29 | The Boeing Company | Inlet guide vane bleed system |
US4674704A (en) * | 1985-12-03 | 1987-06-23 | The United States Of America As Represented By The Secretary Of The Air Force | Direct air cooling system for airborne electronics |
US6914779B2 (en) * | 2002-02-15 | 2005-07-05 | Microsoft Corporation | Controlling thermal, acoustic, and/or electromagnetic properties of a computing device |
JP2004071615A (ja) * | 2002-08-01 | 2004-03-04 | Elpida Memory Inc | 保護カバー、及び保護カバー付き半導体装置 |
US7448219B2 (en) * | 2004-06-21 | 2008-11-11 | Boeing Co | Hingeless flapper valve for flow control |
US7307840B2 (en) * | 2005-10-14 | 2007-12-11 | Smiths Aerospace Llc | Cross-flow redundant air cooling method for high reliability electronics |
WO2009118245A1 (fr) * | 2008-03-28 | 2009-10-01 | Alstom Technology Ltd | Aube directrice pour turbine à gaz et turbine à gaz dotée d'une aube directrice de ce type |
-
2013
- 2013-08-01 FR FR1357673A patent/FR3009340B1/fr active Active
-
2014
- 2014-07-31 GB GB1601451.6A patent/GB2531217B/en active Active
- 2014-07-31 US US14/908,336 patent/US9945249B2/en active Active
- 2014-07-31 WO PCT/FR2014/052002 patent/WO2015015128A1/fr active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2879564A1 (fr) * | 2004-12-20 | 2006-06-23 | Airbus France Sas | Agencement d'entree d'air de ventilation a element d'obturation mobile |
US20090175718A1 (en) * | 2007-12-31 | 2009-07-09 | Carlos Diaz | System and method for passive cooling of gas turbine engine control components |
US20110186263A1 (en) * | 2008-07-31 | 2011-08-04 | Airbus Operations Gmbh | Heat exchanger for the outer skin of an aircraft |
FR2960912A1 (fr) * | 2010-06-08 | 2011-12-09 | Snecma | Dispositif de protection d'un calculateur de turbo-machine d'aeronef en cas de feu |
Also Published As
Publication number | Publication date |
---|---|
US20160160683A1 (en) | 2016-06-09 |
FR3009340A1 (fr) | 2015-02-06 |
GB2531217B (en) | 2020-04-08 |
US9945249B2 (en) | 2018-04-17 |
GB201601451D0 (en) | 2016-03-09 |
FR3009340B1 (fr) | 2018-03-09 |
GB2531217A (en) | 2016-04-13 |
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