WO2012156637A1 - Dispositif de degivrage d'un bec de separation de turbomachine - Google Patents
Dispositif de degivrage d'un bec de separation de turbomachine Download PDFInfo
- Publication number
- WO2012156637A1 WO2012156637A1 PCT/FR2012/051077 FR2012051077W WO2012156637A1 WO 2012156637 A1 WO2012156637 A1 WO 2012156637A1 FR 2012051077 W FR2012051077 W FR 2012051077W WO 2012156637 A1 WO2012156637 A1 WO 2012156637A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- separation
- turbomachine
- tube
- spout
- Prior art date
Links
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
- F01D25/02—De-icing means for engines having icing phenomena
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/04—Air intakes for gas-turbine plants or jet-propulsion plants
- F02C7/047—Heating to prevent icing
-
- 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
- F05D2260/00—Function
- F05D2260/30—Retaining components in desired mutual position
Definitions
- the present invention relates to a device for de-icing the front parts of a turbomachine, and more specifically to the separation spout of a turbomachine.
- the invention also relates to a defrosting spout provided with such a defrosting device, and a turbomachine comprising such a defrosting device.
- the components located at the front of the turbomachine are sensitive to frost and do not undergo or insufficiently the effects of centrifugal force capable of protecting them from a large accumulation of ice during a extended flight in icing conditions.
- a solution usually used to limit the consequences of frost and defrost parts is to use a heating system with hot air that is taken from the compressor of the turbomachine.
- the state of the art proposes to insert into the separation nozzle an air inlet duct which injects air from the high pressure compressor into the separation nozzle.
- the separation nozzles have smaller and smaller dimensions, so that it is more and more difficult to insert ducts in the separation spout.
- the internal space of the separation spout is already occupied by a centering diameter which allows to center the outer shell of the spout of separation from the inner ferrule of the separation spout. Consequently, once this centering diameter has been placed in the separation spout, the space left free for the air intake duct is reduced, so that the quantity of air coming from the high pressure compressor that the can be injected into the separator nozzle is limited.
- the efficiency of the separator nozzle defrost decreases as the dimensions of the separator nozzle decrease.
- the invention aims to overcome the drawbacks of the state of the art by proposing a de-icing device of a turbomachine separation nozzle which effectively de-icers the separating nozzle, even if it has reduced dimensions.
- a device for deicing a turbomachine separation nozzle the separation nozzle being formed by an inner ferrule and an outer ferrule, the inner ferrule being provided with a first fastening flange and a second fastening flange, the deicing device comprising:
- an inner air supply duct capable of injecting air into the separation spout, said inner supply duct being connected to an air inlet (21), the air inlet (21) forming a projection external to the defrosting device (16) allowing a flexible connection with a tube for conveying hot air;
- second fastening means capable of being fixed to the second fastening flange.
- the invention allows a flexible fitting between an intermediate tube or an air conveying tube with the deicing device.
- the deicing device forms a bridge allowing a simple assembly, sufficiently robust for the maintenance of the tube and for absorbing part of the forces of the parts deforming under the effect of thermal expansion.
- the flexible connection is made by fitting an air conveying tube into the inlet of the deicing device.
- the flexible connection is made by means of a seal disposed in the air inlet so that the tube is fitted and held directly in the seal.
- the device forms a bridge to accommodate a tube of diameter less than the diameter of the air inlet.
- the deicing device comprises on its upper outer wall fixing means.
- the upper wall is arranged so that the outer ring can be fixed in abutment on this upper outer wall;
- the invention proposes to eliminate the centering diameter of the separation spout and the air inlet duct, which were in the prior art two separate parts, and to replace these two separate pieces of the prior art by the deicing device according to the invention which allows both to inject air into the separation nozzle and to achieve the centering of the outer shell relative to the inner shell.
- the fact of using a single piece instead of two saves space inside the separation spout, which allows to inject larger amounts of air into the splitter, even when the one It has reduced dimensions, which allows to have an effective defrost.
- the defrosting device thus makes it possible both to center the separation spout, and to convey air into the thinnest zone of the separation spout.
- the first centering function is therefore performed by the outer part of the deicing device, while the defrosting function is performed by the inner part of the deicing device.
- the inner air supply duct may have larger dimensions than in the prior art, so that defrosting is more efficient.
- the deicing device may also have one or more of the following characteristics taken individually or in any possible technical combination.
- the inner air supply duct has an oblong section, which makes it possible to inject a large quantity of air into the separation spout, while having a shape adapted to the interior space of the spout. of seperation.
- the defrosting device preferably has an oblong section so as to have a shape adapted to the interior space of the separation spout and to be able to inject the maximum amount of air into the separation spout.
- the fact that the deicing device has a large upper surface makes it possible to have a large bearing surface for the outer shell so as to improve its centering and fixing.
- the deicing device preferably comprises an air inlet connected to the inner air supply duct, the air inlet being adapted to be connected to means for withdrawing air from a compressor of the air. turbine engine.
- the air inlet preferably has standard dimensions, that is to say similar to the dimensions of the air inlets of the de-icing devices of the prior art so that this air inlet can be connected. existing defrost air withdrawal means.
- each fixing means comprises two fixing lugs each pierced by a hole.
- Each fixing lug is preferably arranged so that, when said lug bears against the inner ferrule, the hole of said lug is aligned with a hole in one of the fixing flanges.
- the upper outer wall is provided with two orifices, each orifice being adapted to receive a prison nut.
- the two orifices make it possible to fix the outer shell on the upper outer wall of the deicing device.
- the fact that the orifices are able to receive captive nuts is particularly advantageous, because thus, the outer shell can be attached to the deicing device, even if its upper outer wall is difficult to access.
- the defrosting device is preferably made by means of lost wax in fact many cavities it contains.
- the separation nozzle comprises an outer shell formed by a plurality of panels, at least a portion of these panels being assembled together by means of the deicing device.
- the deicing device not only allows air to be injected into the separation nozzle, to center the outer shell, but also to assemble panels of the outer shell. This saves the number of assembly components used.
- the separation spout preferably comprises several de-icing devices according to the first aspect of the invention.
- defrosting devices are preferably distributed circumferentially in the defrosting nozzle.
- a plurality of defrosting devices is disposed between two flanges at different circumferential positions so as to convey air into the nozzle through different air inlets.
- a circumferential distribution element comprises a plurality of air outlets for supplying air to a plurality of de-icing devices and having a plurality of inlets for connecting a plurality of air conveying tubes. This configuration distributes the air evenly in the separation spout.
- the distribution element is a circumferential tube circling a stator ring near one end of the secondary flange.
- a third aspect of the invention also relates to a turbomachine comprising a separation nozzle according to one of the aspects of the invention.
- FIG. 1 a sectional view of a turbomachine in which a deicing device according to one embodiment of the invention can be installed;
- FIG. 2 a schematic sectional view of the separation nozzle of the turbomachine of Figure 1;
- FIG. 3 a perspective view of a deicing device according to one embodiment of the invention.
- FIG. 5 a side view of the interior space of the defrosting spout of FIG. 2 in which the deicing device of FIG. 3 has been installed;
- FIGS. 6 to 8 the different steps for fixing the external ferrule of the separation spout on the deicing device of FIG. 3.
- the identical or similar elements are marked with identical reference signs on FIG. set of figures.
- FIG. 1 represents in section a turbomachine in which the deicing device according to the invention is preferably installed.
- the turbomachine extends along a reference axis 13.
- the term “axial” designates a direction parallel to this reference axis and “radial” a direction perpendicular to this reference axis.
- This turbomachine comprises a first fan 1 behind which the air flow is separated into a primary flow 2 which circulates in a primary vein 4 and a secondary flow 3 which circulates in a secondary vein 5.
- the primary flow 2 and the secondary flow 3 are separated by a separator nozzle 6 shown more precisely in FIG. 2.
- This separation nozzle 6 is formed by the intersection of an inner ferrule 7 and an outer ferrule 8.
- the inner ferrule 7 is formed by the assembly of rings 9a, 9b, 9c capable of carrying blades or rectifiers.
- the first ring 9a is connected to the second ring 9b by means of a first fastening flange 10a.
- the second crown 9b is assembled at the third ring 9c via a second attachment flange 10b.
- the first attachment flange 10a is formed by a shoulder 11a of the first ring 9a bearing axially against a shoulder 11b of the second ring 9b. These two shoulders 11a, 11b are each pierced by a hole and assembled by a screw-nut system 14a placed in these holes.
- the second fixing flange 10b is formed by a shoulder 12a of the second ring 9b bearing axially against a shoulder 12b of the third ring 9c. These two shoulders 12a, 12b are each pierced by a hole and assembled by a screw-nut system 14b placed in these holes.
- the outer shell 8 is formed by several plates 15a, 15b, 15c screwed together.
- a defrosting device 16 is shown in FIGS. 3 and 4.
- This defrosting device comprises an inner air supply duct 17 capable of injecting air into the separation spout 6.
- This inner duct air supply 17 has an oblong cross section.
- the inner air supply duct 17 is connected to an air inlet 21 which preferably has a cylindrical section and in which air supply tubes from the high pressure compressor can be fitted.
- the sections of the inner air supply duct 17 and the air inlet 21 can be adjusted according to the air flow that is to be injected into the separation spout.
- the inner air supply duct 17 has an upper outer wall 18 which forms the upper outer wall 18 of the defrosting device.
- This upper outer wall 18 is preferably shaped so that a panel 15b of the outer shell 8 can come into radial abutment on this upper outer wall 18.
- This upper outer wall 18 is preferably pierced by at least two apertures 19 fit to receive captive nuts. Each of these orifices 19 is surrounded by two holes 20 for tightening the prisoner nut once it is in the orifice 19.
- the defrosting device 16 also preferably comprises first fastening means 22 adapted to be fixed to the first fastening flange 10a and second fastening means 23 adapted to be fixed to the second fastening flange 10b.
- Each fastening means 22, 23 comprises two fastening lugs 25, 26 each pierced by a hole 27.
- Each fixing lug 25, 26 is arranged so that, when said fastening lug 25, 26 bears radially against the inner shell 7, the hole 27 of said bracket 25, 26 is aligned with a hole of one of the clamps 10a, 10b.
- the distance D1 between the first attachment means 22 and the second attachment means 23 is substantially equal to the distance D2 between the first attachment flange 10a and the second attachment flange 10b, so that the deicing device can be inserted between the two fixing flanges 10a, 10b and so that, when the deicing device is inserted between the two fixing flanges 10a, 10b, the fastening means 22, 23 are in axial abutment against the fixing flanges 10a, 10b.
- the deicing device is therefore dimensioned to come into radial abutment on the second ring 9b, between the two attachment flanges 10a, 10b.
- the air inlet 21 is preferably positioned so that, when the fastening lugs 25, 26 are in radial abutment against the second ring 9b, the air inlet 21 passes over the second attachment flange 10b, so that the air inlet is above the third ring 9c.
- the second fixing flange 10b is preferably cut locally so as to include local recesses 29 for passing the air inlet 21 above the second flange 10b.
- the deicing device Given the shape of the deicing device, the latter is preferably made by foundry processes such as lost wax.
- the fixation of the deicing device of FIGS. 3 and 4 in the separation nozzle of FIG. 2 is now described with reference to FIGS. 6 to 8.
- the deicing device 16 is thus placed in radial abutment on the second ring 9b.
- the deicing device is secured to the fastening flanges 10a, 10b by means of screw-nut systems which pass through both the holes of the fastening flanges and those of the fixing lugs 22, 23.
- a supply tube 28 of air coming from the high-pressure compressor is then fitted onto the air inlet 21 defrosting device 19 (FIG. 6).
- the panels 15a which form the front part of the outer shell 8 are then positioned in radial support on the upper outer wall 18 of the deicing device 16 (FIG. 7).
- the panels 15b which form a part of the outer shell 8 are then placed in radial support on the upper outer wall 18 of the deicing device.
- the captive nuts 30 are then inserted to assemble the panels 15a and 15b and the defrosting device 16.
- the panels 15a and 15b are assembled together via the deicing device 16, which reduces the number assembly parts used.
- the defrosting device 16 is thus totally included in the interior space at the separation spout.
- the defrosting device therefore has a height H1 less than the height H2 of the interior space of the separation spout at the level of the second ring 9b.
- the outer shell 8 formed by the panels 15a, 15b is centered thanks to the deicing device.
- Defrosting devices 16 such as that described with reference to FIGS. 3 and 4 are preferably installed in the separation spout all around the circumference of the separation spout.
- six defrosting devices 16 are preferably installed in the separation spout. In order to have effective defrosting, it suffices to connect four of these six defrosting devices to tubes for supplying air from the high-pressure compressor.
- the other two de-icing devices 16 serve only for fixing the panels 15a, 15b and for centering the outer shell 8.
- the local recesses 29 in the second fixing flange are preferably made only where an air inlet 21 a defrosting device passes.
- the deicing device according to the invention therefore makes it possible, in one piece at a time, to center the separation spout, but also to route a large amount of air into the separation spout.
- the invention is not limited to the embodiments described with reference to the figures and variants could be envisaged without departing from the scope of the invention.
- the number and shape of the parts that form the separator nozzle are not limiting.
- the deicing device has been described in detail in the case where it allows to deice a separation nozzle.
- the deicing device according to the invention could also be used to further de-ice the stator vanes juxtaposed with the separator nozzle.
- the de-icing device of a separation spout comprises an air inlet 21 forming an annular outer projection.
- the projection forms an opening allowing the entry of a gas.
- the shape of the entrance can be oblong, circular or bean-shaped.
- the air inlet forms a bridge for fitting an air routing tube for deicing the spout.
- the average diameter of the air inlet of the deicing device forming a projection is substantially greater than the average diameter of the tube so as to allow simple fitting and allowing relative flexibility, in particular to allow a play of mechanical parts.
- the tubes can simply interconnect by sliding from one to the other. This configuration makes it possible to absorb a part of the reports of forces exerted on the deicing device.
- the junction between the air inlet of the deicing device and the tube may comprise a seal.
- the latter allows a game between the different elements.
- an advantage is that the game allows mechanical tolerance and allows deformation so as to withstand stresses on the parts, for example during temperature variations.
- the use of a flexible junction allows adaptation to a wide range in temperature.
- the use of a seal makes it possible to absorb part of the forces of the parts under the effect of the expansion. when the temperature is high. This effect is equivalent to other flexible fastening means allowing a certain clearance between the parts including the air routing tube and the air inlet of the deicing device.
- junction By flexible junction is meant a junction allowing a mechanical clearance between the hot air routing tube and the air inlet of the deicing device.
- the use of a seal makes it possible to achieve a fastening adapted so that the tube remains held in the air inlet and sufficiently flexible to allow expansion of the parts in case of increase in temperature.
- the seal may be chosen so as to allow a temperature variation of up to 250 ° C.
- the de-icing device of the invention allows the use of small diameter tubes coming into the bridge so that the defrosting device allows a small footprint near the separation nozzle between the inner ferrule 7 and outer 8. It is possible according to an alternative embodiment to fix a plurality of defrosting devices on a ring so that they are distributed all around the circumference of said ring. These can be fixed at different positions on the ring according to the envisaged configuration.
- the fasteners used in the context of the use of several deicing devices may be those described above. This flexibility makes it possible to adapt, depending on the size of the turbomachine and the design of the separation spout, the number of deicing devices and their distribution around a ring between two rings.
- One advantage is to allow the injected air flow to be evenly distributed to de-ice the spout over the entire circumference of said partition spout.
- One advantage is to heat this area uniformly so as not to cause excessive temperature differences at different locations near the separation nozzle.
- Another beneficial effect is that the conveying tubes can be thereby increased tenfold around the crown depending on the number of deicing devices that are attached.
- the conveying tubes may have a smaller diameter than if a single air conveying tube were used. It is then possible to use tubes of small diameters, in particular less than 25,4mm. This embodiment is particularly suitable for thin separation nozzles.
- an intermediate tube may be used.
- the intermediate tube is circular or runs through a portion of an arc around the ring so as to distribute the air at the inlet of the defrosting devices, it is called circumferential tube.
- a plurality of conveying tubes can interconnect on the circumferential tube to diffuse hot air at different points.
- the circumferential tube comprises a plurality of inlets for receiving air from the conveying tubes and a plurality of outlets interfacing with the air inlets of the defrosting devices.
- the outputs of the circumferential tube interfacing with the inputs of the deicing devices may comprise oblong, circular, or bean-shaped sections.
- additional securing means may be added as needed to strengthen and maintain the hot air delivery structure while maintaining flexibility in the interconnect joint with the defrosting device.
- the fastenings of the circumferential tube may make it possible to fix the circumferential tube to the shell 7, for example at the level of the ring 9c.
- the circumferential tube is a tube encircling the stator portion of the booster of the turbomachine.
- FIG. 9 represents a perspective view of an embodiment in which is shown a circumferential tube 40 and an air routing tube 41. This embodiment allows an optimization of the axial and circumferential flexibility of the air routing tubes and the circumferential tube which are assembled around the ring and through the inputs of the deicing devices.
- the flexibility of the system can be improved by the use of ball joints for interconnecting the outputs of the circumferential tube with the inlets of the defrosting devices.
- the uniform distribution of air is also due to the equivalent lengths to flow through hot air streams from a compressor to the nozzle of separation since the lengths of conveying tubes are identical.
- Identical routing tubes can be used to facilitate the design and assembly of the system. In this case the losses of heat or charge are identical at all points of entry of the deicing device.
- an improved mode of the invention allows the use of tubes of identical length so as to avoid differential pressure drop.
- a single routing tube is interconnected with the circumferential tube.
- the circumferential tube has a single inlet and a plurality of outlet for uniformly distributing the hot air of the conveying tube.
- the solution of the circumferential tube allows a favorable mechanical play including a tolerance to thermal expansion. This game is also favorable for mounting the system. In addition, it allows a better reaction of the mechanical parts vis-à-vis the constraints.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/118,092 US9759088B2 (en) | 2011-05-16 | 2012-05-15 | Device for de-icing a turbomachine separator |
GB1322229.4A GB2506051B (en) | 2011-05-16 | 2012-05-15 | Device for de-icing a turbomachine separator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1154249 | 2011-05-16 | ||
FR1154249A FR2975435B1 (fr) | 2011-05-16 | 2011-05-16 | Dispositif de degivrage d'un bec de separation de turbomachine |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012156637A1 true WO2012156637A1 (fr) | 2012-11-22 |
Family
ID=46321111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2012/051077 WO2012156637A1 (fr) | 2011-05-16 | 2012-05-15 | Dispositif de degivrage d'un bec de separation de turbomachine |
Country Status (4)
Country | Link |
---|---|
US (1) | US9759088B2 (fr) |
FR (1) | FR2975435B1 (fr) |
GB (1) | GB2506051B (fr) |
WO (1) | WO2012156637A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3004485B1 (fr) * | 2013-04-11 | 2015-05-08 | Snecma | Dispositif de degivrage d'un bec de separation de turbomachine aeronautique |
BE1023289B1 (fr) * | 2015-07-17 | 2017-01-24 | Safran Aero Boosters S.A. | Bec de separation de compresseur basse pression de turbomachine axiale avec conduit annulaire de degivrage |
US10189572B2 (en) * | 2016-05-02 | 2019-01-29 | The Boeing Company | Systems and methods for preventing ice formation on portions of an aircraft |
FR3087477A1 (fr) * | 2018-10-22 | 2020-04-24 | Safran Aircraft Engines | Dispositif de degivrage d'un bec de turbomachine |
US20210189960A1 (en) * | 2019-10-21 | 2021-06-24 | American Aviation, Inc. | Aircraft turboprop engine inlet compact profile configuration |
FR3103520B1 (fr) * | 2019-11-27 | 2022-07-29 | Safran Nacelles | Entrée d’air et procédé de dégivrage d'une entrée d'air d’une nacelle d'un turboréacteur d'aéronef |
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EP0918150A1 (fr) * | 1997-11-21 | 1999-05-26 | Aerospatiale Societe Nationale Industrielle | Dispositif de dégivrage pour capot d'entrée d'air de moteur à réaction |
US20030035719A1 (en) * | 2001-08-17 | 2003-02-20 | Wadia Aspi Rustom | Booster compressor deicer |
FR2859500A1 (fr) * | 2003-09-05 | 2005-03-11 | Gen Electric | Procede d'assemblage d'un moteur a turbines prevenant l'accumulation de glace dans le moteur et systeme de protection contre le gel |
FR2921901A1 (fr) * | 2007-10-08 | 2009-04-10 | Aircelle Sa | Structure d'entree d'air apte a etre montee en amont d'une structure mediane de nacelle pour moteur d'aeronef, et nacelle equipee d'une telle structure d'entree d'air |
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US2686631A (en) * | 1948-05-08 | 1954-08-17 | United Aircraft Corp | Coolant injection system for gas turbines |
US2746671A (en) * | 1950-04-14 | 1956-05-22 | United Aircraft Corp | Compressor deicing and thrust balancing arrangement |
US2712727A (en) * | 1950-05-17 | 1955-07-12 | Rolls Royce | Gas turbine power plants with means for preventing or removing ice formation |
US2832528A (en) * | 1953-10-01 | 1958-04-29 | Gen Motors Corp | Alcohol mist icing prevention |
CH405027A (de) * | 1963-01-29 | 1965-12-31 | Oetiker Hans | Schlauchbride |
US4193435A (en) * | 1978-08-31 | 1980-03-18 | Nasa | Floating nut retention system |
US4312101A (en) * | 1978-09-26 | 1982-01-26 | Hans Oetiker | Hose clamp with insert member |
US4351150A (en) * | 1980-02-25 | 1982-09-28 | General Electric Company | Auxiliary air system for gas turbine engine |
US4782658A (en) * | 1987-05-07 | 1988-11-08 | Rolls-Royce Plc | Deicing of a geared gas turbine engine |
US5085559A (en) * | 1990-04-16 | 1992-02-04 | The United States Of America As Represented By The Secretary Of The Air Force | Composite vane |
FR2746141B1 (fr) * | 1996-03-14 | 1998-04-17 | Dispositif de commande pour pivot integre dans un collecteur | |
US6637076B2 (en) * | 2002-01-22 | 2003-10-28 | Hai Tran | Fabricated steel lug pipe repair clamp |
US7131612B2 (en) * | 2003-07-29 | 2006-11-07 | Pratt & Whitney Canada Corp. | Nacelle inlet lip anti-icing with engine oil |
FR2887294B1 (fr) * | 2005-06-21 | 2007-08-10 | Airbus France Sas | Systeme pour le degivrage du bord d'attaque d'un capot d'entree d'air pour turbomoteur |
US8205426B2 (en) * | 2006-07-31 | 2012-06-26 | General Electric Company | Method and apparatus for operating gas turbine engines |
FR2927882B1 (fr) * | 2008-02-27 | 2010-02-12 | Aircelle Sa | Structure d'entree d'air pour une nacelle d'un aeronef |
-
2011
- 2011-05-16 FR FR1154249A patent/FR2975435B1/fr active Active
-
2012
- 2012-05-15 WO PCT/FR2012/051077 patent/WO2012156637A1/fr active Application Filing
- 2012-05-15 US US14/118,092 patent/US9759088B2/en active Active
- 2012-05-15 GB GB1322229.4A patent/GB2506051B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0918150A1 (fr) * | 1997-11-21 | 1999-05-26 | Aerospatiale Societe Nationale Industrielle | Dispositif de dégivrage pour capot d'entrée d'air de moteur à réaction |
US20030035719A1 (en) * | 2001-08-17 | 2003-02-20 | Wadia Aspi Rustom | Booster compressor deicer |
FR2859500A1 (fr) * | 2003-09-05 | 2005-03-11 | Gen Electric | Procede d'assemblage d'un moteur a turbines prevenant l'accumulation de glace dans le moteur et systeme de protection contre le gel |
FR2921901A1 (fr) * | 2007-10-08 | 2009-04-10 | Aircelle Sa | Structure d'entree d'air apte a etre montee en amont d'une structure mediane de nacelle pour moteur d'aeronef, et nacelle equipee d'une telle structure d'entree d'air |
Also Published As
Publication number | Publication date |
---|---|
US9759088B2 (en) | 2017-09-12 |
GB2506051B (en) | 2018-12-05 |
GB201322229D0 (en) | 2014-01-29 |
FR2975435B1 (fr) | 2016-09-02 |
GB2506051A (en) | 2014-03-19 |
US20140072405A1 (en) | 2014-03-13 |
FR2975435A1 (fr) | 2012-11-23 |
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