WO2009024660A1 - Nacelle a section de sortie adaptable - Google Patents
Nacelle a section de sortie adaptable Download PDFInfo
- Publication number
- WO2009024660A1 WO2009024660A1 PCT/FR2008/000859 FR2008000859W WO2009024660A1 WO 2009024660 A1 WO2009024660 A1 WO 2009024660A1 FR 2008000859 W FR2008000859 W FR 2008000859W WO 2009024660 A1 WO2009024660 A1 WO 2009024660A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nacelle
- spacing means
- rigid
- section
- designed
- 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.)
- Ceased
Links
Classifications
-
- 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—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/04—Arrangement in aircraft of power plant parts or auxiliaries not otherwise provided for of exhaust outlets or jet pipes
-
- 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
- B64D29/00—Power-plant nacelles, fairings or cowlings
- B64D29/06—Attaching of nacelles, fairings or cowlings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/06—Varying effective area of jet pipe or nozzle
- F02K1/08—Varying effective area of jet pipe or nozzle by axially moving or transversely deforming an internal member, e.g. the exhaust cone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
- F02K1/06—Varying effective area of jet pipe or nozzle
- F02K1/08—Varying effective area of jet pipe or nozzle by axially moving or transversely deforming an internal member, e.g. the exhaust cone
- F02K1/085—Varying effective area of jet pipe or nozzle by axially moving or transversely deforming an internal member, e.g. the exhaust cone by transversely deforming an internal member
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/0536—Highspeed fluid intake means [e.g., jet engine intake]
Definitions
- the invention relates to a jet engine nacelle for an aircraft.
- An aircraft is driven by several turbojets each housed in a nacelle also housing a set of ancillary actuators related to its operation and providing various functions when the turbojet engine is in operation or stopped.
- These ancillary actuating devices may comprise in particular a mechanical system for actuating thrust reversers.
- a nacelle generally has a tubular structure comprising an air inlet in front of the turbojet engine, a median section intended to surround a fan of the turbojet engine, a rear section housing thrust reverser means and intended to surround the combustion chamber of the turbojet engine. , and is generally terminated by an ejection nozzle whose output is located downstream of the turbojet engine.
- Modern nacelles are often intended to house a turbofan engine capable of generating through the blades of the rotating fan a hot air flow (also called primary flow) from the combustion chamber of the turbojet engine.
- a nacelle generally has an external structure, called Outer Fixed Structure (OFS), which defines, with a concentric internal structure of the rear section, called Inner Fixed Structure (IFS), surrounding the structure of the turbojet itself behind the fan, an annular flow channel, also called a secondary vein, for channeling a cold air flow, said secondary, which circulates outside the turbojet engine.
- OFS Outer Fixed Structure
- IFS Inner Fixed Structure
- the internal structure and the ejection nozzle define an outlet section of the ventilation of the engine compartment whose main object is to renew the air which circulates between I 1 and IFS the engine, but which can be used to recover some of the thrust lost by the air taken from the secondary vein by the geometric control of the passage surface of the air flow.
- spacing means in the form of rigid spacers are arranged in the outlet section and held by belting. In flight, the turbojet engine however tends to twist, and this differently from the nacelle, which causes very large loads of said turbojet compartment on the nacelle.
- the object of the present invention aims to remedy this problem, and consists of a turbojet engine nacelle comprising a rear section having an internal structure intended to surround a rear part of a engine compartment and to delimit, with a ejection nozzle, a calibrated outlet section of the ventilation of the engine compartment by means of spacing means arranged in the outlet section, characterized in that the spacing means are decomposed into rigid spacing means designed to ensure a constant spacing, and compensation means designed to be able to adapt to the relative movements of the turbojet relative to the nacelle.
- the compensation means are attached to rigid spacing means.
- the compensation means are designed to form a valve.
- the spacing means can thereby adapt to an increased pressure occurring in the engine compartment.
- the compensation means may be arranged to disappear under the action of this increased pressure, so that an additional passage will be opened to increase the ejected air flow.
- the rigid spacing means are fixed in the internal structure.
- the rigid spacing means are fixed in the ejection nozzle.
- the rigid spacing means comprise a plurality of U-shaped elements forming spacers distributed over the periphery of the outlet section.
- the compensation means comprise a plurality of elements having a first end attached to the rigid spacing means, and a second free end.
- the compensation means are in the form of a ring comprising a plurality of longitudinal slots forming longitudinal fingers.
- the second free end of each element is pressed against the ejection nozzle.
- the second free end of each element is pressed against the internal structure.
- the present invention also relates to an aircraft, characterized in that it comprises at least one nacelle according to the invention.
- Figure 1 is a schematic longitudinal sectional view of a nacelle according to the invention in the closed state
- Figure 2 is an enlarged schematic perspective view from the rear of the nacelle shown in Figure 1;
- Figure 3 is an enlarged schematic view of the exit section from the rear of the nacelle shown in Figure 2;
- Figure 4 is a partial schematic view from the front of the outlet section shown in Figure 3;
- Figure 5 is a schematic longitudinal sectional view of the outlet section of the nacelle shown in Figure 1;
- Figure 6 is a schematic view similar to Figure 5, during an increase in pressure in the combustion chamber of the turbojet engine.
- a nacelle 1 of an aircraft according to the invention comprises, in a manner known per se, a front air intake section 2, a median section 3 intended to surround the fan 4, and a rear section 5 for surrounding a motor compartment (not shown) and terminated by an ejection nozzle 6 whose output is located behind the turbojet engine.
- This nacelle 1 comprises an external structure 7, called OFS, which defines an annular flow channel 8 with a concentric internal structure 9, called IFS, surrounding the structure of the turbojet itself behind the fan 4.
- OFS external structure 7
- IFS concentric internal structure 9
- the internal structure 9 and the ejection nozzle 6 delimit an outlet section 10 of the ventilation of the engine compartment which can be used to recovering part of the thrust lost by the air taken from the annular channel 8 by the geometric control of the air flow passage surface.
- spacing means made of metal, in particular of titanium, are arranged in the outlet section 10.
- spacing means are decomposed into rigid spacing means 11, 12 designed to ensure a constant spacing, and compensation means 13 designed to be able to adapt to the relative movements of the turbojet engine relative to the platform 1 .
- the rigid spacing means 11, 12 are made using a plurality of U-shaped elements in section, and forming spacers.
- the rigid spacing means 11 are arranged in such a way that the free branches of the U are parallel to the axis 14 of the nacelle 1, and directed towards the front.
- the rigid spacing means 12 are positioned in such a way as to be positioned in a plane transverse to the axis 14 of the nacelle 1.
- the rigid spacing means 11, 12 are uniformly distributed in the same plane on the periphery of the outlet section 10, so that a rigid spacing means 12 is interposed between two rigid spacing means 11, as more specifically shown in Figures 3 and 4.
- the rigid spacing means 11, 12 are each fixed by riveting in the internal structure 9, as shown schematically in FIG. 5 under the reference 20.
- the spaces between the different rigid spacing means 11, 12 thus define passages allowing calibrated ventilation at the outlet section 10.
- each rigid spacing means 12 which also defines a passage allowing calibrated ventilation at the outlet section 10.
- the compensation means 13 are made in the form of a ring 15 comprising a plurality of longitudinal slots 16 forming longitudinal fingers 17 parallel to the axis 14.
- This ring 15 is fixed by means of rivets 18 in each of the rigid spacing means 11, 12 at the front end of each finger 17, and the free rear end thereof is resting on the outer face of the ejection nozzle 6.
- the spacing means 11 have in particular the function of making stops in case of strong relative displacements of the motor relative to the nacelle 1, in addition to maintaining the front end of each finger 17.
- the spacing means 12 have their function to maintain the front end of each finger 17, while not obstructing the ventilation outlet 10.
- each finger 17 schematically comprises a first portion 17a before secured to a second portion 17b rear via a bend 19.
- This finger 17 is designed so that, once the ring 15 fixed in the rigid spacing means 11, 12, it is necessary to radially spread the second portion 17b in order to be able to press against the nozzle of ejection 6. Each finger 17 is then constantly under tension, the second portion 17b tends to recover its rest position shown schematically in phantom in Figure 5.
- these fingers 17 are designed to form a valve. This is a considerable advantage insofar as the compensation means 13 can thus adapt to an increase in pressure occurring in the engine compartment, as shown in FIG. 6. Indeed, the second portion 17b of each finger 17 may deviate radially from the ejection nozzle 6 under the action of this increased pressure, so that an additional passage, marked by the arrow, is open to increase the flow of ejected air.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Supercharger (AREA)
Abstract
Description
Claims
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2696792A CA2696792C (fr) | 2007-08-20 | 2008-06-19 | Nacelle a section de sortie adaptable |
| BRPI0813603 BRPI0813603A2 (pt) | 2007-08-20 | 2008-06-19 | "nacela para um turbojato e aeronave" |
| RU2010109801/11A RU2469923C2 (ru) | 2007-08-20 | 2008-06-19 | Гондола с регулируемой выпускной секцией |
| CN200880102592.0A CN101784449B (zh) | 2007-08-20 | 2008-06-19 | 具有可适性出口部分的发动机舱 |
| US12/674,237 US8875518B2 (en) | 2007-08-20 | 2008-06-19 | Nacelle with an adaptable outlet section |
| EP08828022A EP2181041A1 (fr) | 2007-08-20 | 2008-06-19 | Nacelle a section de sortie adaptable |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0705920A FR2920146B1 (fr) | 2007-08-20 | 2007-08-20 | Nacelle a section de sortie adaptable |
| FR0705920 | 2007-08-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009024660A1 true WO2009024660A1 (fr) | 2009-02-26 |
Family
ID=39204058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2008/000859 Ceased WO2009024660A1 (fr) | 2007-08-20 | 2008-06-19 | Nacelle a section de sortie adaptable |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US8875518B2 (fr) |
| EP (1) | EP2181041A1 (fr) |
| CN (1) | CN101784449B (fr) |
| BR (1) | BRPI0813603A2 (fr) |
| CA (1) | CA2696792C (fr) |
| FR (1) | FR2920146B1 (fr) |
| RU (1) | RU2469923C2 (fr) |
| WO (1) | WO2009024660A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012056138A1 (fr) | 2010-10-25 | 2012-05-03 | Aircelle | Nacelle de turboréacteur à section de sortie de ventilation adaptable |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9624831B2 (en) | 2011-03-17 | 2017-04-18 | Bombardier Inc. | System and method for operating a precooler in an aircraft |
| FR2978989B1 (fr) * | 2011-08-12 | 2013-07-26 | Aircelle Sa | Cone d'ejection pour turboreacteur d'aeronef |
| US10294863B2 (en) | 2013-07-09 | 2019-05-21 | United Technologies Corporation | Preloaded AFT vent area for low pressure fan ducts |
| CN106573682B (zh) | 2014-08-20 | 2020-03-27 | 庞巴迪公司 | 用于飞机高温排气的致动出口门 |
| FR3075865B1 (fr) * | 2017-12-21 | 2020-07-17 | Safran Nacelles | Ensemble propulsif pour aeronef et procede de ventilation d’une enceinte moteur |
| FR3099916B1 (fr) * | 2019-08-16 | 2022-08-05 | Safran Aircraft Engines | Structure interne pour nacelle de turbomachine |
| US11685539B2 (en) * | 2019-09-27 | 2023-06-27 | Rohr, Inc. | Passive internal compartment exhaust for an aircraft propulsion system |
| US11518535B2 (en) * | 2019-09-30 | 2022-12-06 | Rohr, Inc. | Nacelle cowl deflection limiter |
| FR3103226B1 (fr) * | 2019-11-15 | 2021-11-12 | Airbus Operations Sas | Turbomachine d’aeronef comportant une tuyere primaire equipee d’une cale d’usure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5704207A (en) * | 1995-02-03 | 1998-01-06 | The Boeing Company | Flow control apparatus for gas turbine engine installation pressure relief doors |
| EP0867366A2 (fr) * | 1997-03-28 | 1998-09-30 | The Boeing Company | Régulateur de flux pour turbine à gaz avec éléments segmentés |
| US5906097A (en) * | 1997-03-28 | 1999-05-25 | The Boeing Company | Engine flow control device |
| WO2005021934A2 (fr) * | 2003-02-21 | 2005-03-10 | The Nordam Group, Inc. | Tuyere d'echappement ventilee a confluence |
Family Cites Families (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1058933A (en) * | 1963-10-02 | 1967-02-15 | Bristol Siddeley Engines Ltd | Improvements in jet propulsion nozzles |
| US3598318A (en) * | 1970-04-10 | 1971-08-10 | Boeing Co | Movable acoustic splitter for nozzle area control and thrust reversal |
| GB1318748A (en) * | 1970-08-11 | 1973-05-31 | Secr Defence | Gas turgine ducted fan engines for aircraft |
| US3721389A (en) * | 1971-06-10 | 1973-03-20 | Boeing Co | Exit nozzle assemblies for gas turbine power plants |
| FR2260697B1 (fr) * | 1974-02-11 | 1976-06-25 | Snecma | |
| GB1605260A (en) * | 1974-09-07 | 1986-11-12 | Rolls Royce | Gas turbine engines |
| US4232513A (en) * | 1977-10-19 | 1980-11-11 | Rolls-Royce Limited | Pressure relief panel for aircraft powerplant |
| US4271666A (en) * | 1979-08-20 | 1981-06-09 | Avco Corporation | Integral infrared radiation suppressor for a turbofan engine |
| US4825644A (en) * | 1987-11-12 | 1989-05-02 | United Technologies Corporation | Ventilation system for a nacelle |
| US4961588A (en) * | 1989-01-31 | 1990-10-09 | Westinghouse Electric Corp. | Radial seal |
| US5054281A (en) * | 1989-09-25 | 1991-10-08 | Rohr Industries, Inc. | Gas turbine engine compartment vent system |
| DE4008956A1 (de) * | 1990-03-20 | 1991-09-26 | Messerschmitt Boelkow Blohm | Einlaufsystem fuer ueber- oder hyperschallflugzeuge |
| US5174525A (en) * | 1991-09-26 | 1992-12-29 | General Electric Company | Structure for eliminating lift load bending in engine core of turbofan |
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| US5778659A (en) * | 1994-10-20 | 1998-07-14 | United Technologies Corporation | Variable area fan exhaust nozzle having mechanically separate sleeve and thrust reverser actuation systems |
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| GB2308866B (en) * | 1996-01-04 | 1999-09-08 | Rolls Royce Plc | Ducted fan gas turbine engine with secondary duct |
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| US7614210B2 (en) * | 2006-02-13 | 2009-11-10 | General Electric Company | Double bypass turbofan |
| GB0607773D0 (en) * | 2006-04-20 | 2006-05-31 | Rolls Royce Plc | A gas turbine engine |
| US8434309B2 (en) * | 2006-10-12 | 2013-05-07 | United Technologies Corporation | Translating core cowl having aerodynamic flap sections |
| FR2960216B1 (fr) * | 2010-05-19 | 2013-02-15 | Aircelle Sa | Element d'aerodynamisme pour une nacelle d'aeronef |
| US9555871B2 (en) * | 2012-03-05 | 2017-01-31 | The Boeing Company | Two-surface sandwich structure for accommodating in-plane expansion of one of the surfaces relative to the opposing surface |
-
2007
- 2007-08-20 FR FR0705920A patent/FR2920146B1/fr not_active Expired - Fee Related
-
2008
- 2008-06-19 US US12/674,237 patent/US8875518B2/en not_active Expired - Fee Related
- 2008-06-19 RU RU2010109801/11A patent/RU2469923C2/ru not_active IP Right Cessation
- 2008-06-19 EP EP08828022A patent/EP2181041A1/fr not_active Withdrawn
- 2008-06-19 CN CN200880102592.0A patent/CN101784449B/zh not_active Expired - Fee Related
- 2008-06-19 WO PCT/FR2008/000859 patent/WO2009024660A1/fr not_active Ceased
- 2008-06-19 BR BRPI0813603 patent/BRPI0813603A2/pt not_active IP Right Cessation
- 2008-06-19 CA CA2696792A patent/CA2696792C/fr not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5704207A (en) * | 1995-02-03 | 1998-01-06 | The Boeing Company | Flow control apparatus for gas turbine engine installation pressure relief doors |
| EP0867366A2 (fr) * | 1997-03-28 | 1998-09-30 | The Boeing Company | Régulateur de flux pour turbine à gaz avec éléments segmentés |
| US5906097A (en) * | 1997-03-28 | 1999-05-25 | The Boeing Company | Engine flow control device |
| WO2005021934A2 (fr) * | 2003-02-21 | 2005-03-10 | The Nordam Group, Inc. | Tuyere d'echappement ventilee a confluence |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012056138A1 (fr) | 2010-10-25 | 2012-05-03 | Aircelle | Nacelle de turboréacteur à section de sortie de ventilation adaptable |
| US9670798B2 (en) | 2010-10-25 | 2017-06-06 | Aircelle | Turbojet engine nacelle with variable ventilation outlet cross section |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2920146B1 (fr) | 2009-10-30 |
| RU2469923C2 (ru) | 2012-12-20 |
| CA2696792A1 (fr) | 2009-02-26 |
| CN101784449B (zh) | 2015-01-07 |
| CN101784449A (zh) | 2010-07-21 |
| US20110214747A1 (en) | 2011-09-08 |
| EP2181041A1 (fr) | 2010-05-05 |
| RU2010109801A (ru) | 2011-09-27 |
| CA2696792C (fr) | 2015-10-06 |
| FR2920146A1 (fr) | 2009-02-27 |
| BRPI0813603A2 (pt) | 2014-12-30 |
| US8875518B2 (en) | 2014-11-04 |
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