WO2009024657A1 - Tronçon arriere de nacelle d'aeronef, et nacelle equipee d'un tel tronçon arriere - Google Patents
Tronçon arriere de nacelle d'aeronef, et nacelle equipee d'un tel tronçon arriere Download PDFInfo
- Publication number
- WO2009024657A1 WO2009024657A1 PCT/FR2008/000835 FR2008000835W WO2009024657A1 WO 2009024657 A1 WO2009024657 A1 WO 2009024657A1 FR 2008000835 W FR2008000835 W FR 2008000835W WO 2009024657 A1 WO2009024657 A1 WO 2009024657A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rear section
- cavity
- nacelle
- central portion
- halves
- 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
- B64D29/00—Power-plant nacelles, fairings or cowlings
Definitions
- the present invention relates to a rear section of aircraft nacelle, and to a nacelle equipped with such a rear section.
- At least one six-hour cavity disposed under said central portion.
- the cavity six hours whose name comes from its position on the circular section of the nacelle section (by analogy to the positions of the hands on the dial of a watch), is intended to accommodate different pipelines and electrical cables intended for the operation of the turbojet engine and the nacelle.
- the present invention is intended to overcome these disadvantages.
- At least one six-hour cavity disposed under said central portion characterized in that it comprises at least one conduit placing in fluid communication said annular vein with said cavity six hours. Thanks to the presence of this pipe, it is possible to take cold air into the annular vein of cold air and to bring this cold air into the cavity for six hours.
- This cold air makes it possible to compensate for air leakage from inside the cavity six hours outwards, and to bring this cavity to a pressure greater than that prevailing in the central part where the turbojet engine is located.
- the temperature inside the six-hour cavity can be maintained in a relatively low range, compatible with the thermal specifications of the various members (pipes, cables) located inside this cavity.
- this rear pod section According to other optional features of this rear pod section:
- this section comprises a pipe on each of the said halves: this particular arrangement makes it possible to bring a large amount of cold air into the cavity for six hours; - Said pipe passes through a panel of the internal structure of this section: this arrangement has the advantage of simplicity because it does not require any significant modification of a rear section of existing nacelle;
- This section comprises at least one lock connecting said halves and disposed between said central portion and said cavity six hours: such a lock is necessary to contribute to the attachment of the two section halves to each other; due to the overpressure existing inside the cavity six hours, this lock is no longer subject to a circulation of hot air detrimental to the durability of the parts that compose it;
- said six-hour cavity comprises at least one overpressure door: such a door is designed to open in the event of an explosion of a pipe, in particular compressed air located in the cavity for six hours; due to the arrival of cold air in this cavity, the air leakage to the outside occurring at the periphery of this door, are compensated; said cavity comprises firewalls;
- this rear section comprises means of thrust reversal; said thrust reversing means are of the grid type.
- the present invention also relates to an aircraft nacelle, remarkable in that it comprises a rear section in accordance with the foregoing.
- Other characteristics and advantages of the present invention will become apparent in the light of the description which follows and the examination of the appended figures in which:
- FIG. 1 shows in perspective a nacelle according to the invention, equipped with a rear section according to the invention
- FIG. 2 represents a cross-sectional view of the zone of the nacelle of FIG. 1 indicated by the arrow II. of this figure, and
- FIG. 3 represents a view on a larger scale of the zone III of FIG. 2.
- a nacelle 1 attached to a mast 3 to be mounted under an aircraft wing (not shown).
- the nacelle 1 comprises a front section 5 for channeling the outside air to the turbojet engine 7 located inside the nacelle 1, an intermediate section 9 surrounding a fan (not visible) and a section rear 11 disposed around the turbojet engine 7.
- the rear section 11 is formed of two halves 13a, 13b, which can deviate from each other for maintenance operations.
- each half 13a, 13b rear section 11 comprises a panel of internal structure 19a, 19b fixed on a lower beam 21a, 21b, each lower beam supporting a primary rail 23a, 23b and a secondary rail 25a, 25b for receiving a sliding reverse thrust cover (not shown).
- the halves 13a, 13b of the rear section 11 of the nacelle 1 are secured to each other in particular by a latch 27, the two complementary halves are mounted respectively on the beams 21a and 21b.
- the space E located at the joint of the two beams 21a, 21b allows the passage of a stream of air.
- the peripheral edges of the door 17 cooperate in a non-completely sealed manner with fixed parts secured respectively to the beams 21a and 21b.
- Pipes 29a and 29b respectively pass through the fixed walls 19a and 19b, and each open on the one hand into the cold air duct 31 of the nacelle and on the other hand into a zone Z delimited by a wall P, this communicating zone with the space E defined by the two beams 21a, 21b.
- the door 17 is an overpressure door, that is to say a door adapted to open in case a pipe including compressed air disposed inside the cavity 15 would explode.
- This door is pivotally mounted on the beam 21a by means of a gooseneck hinge 33, and it comprises one or more calibrated locks 35 cooperating with the other beam 21b.
- fireproofing members 37 are disposed inside the cavity 15.
- the turbojet engine 7 When the turbojet engine 7 is in operation, it releases a very high heat in the central portion C located between the fixed walls 19a and 19b.
- the cavity 15 can be filled with cold air at a pressure greater than that prevailing in the central area C.
- This flow of cold air is indicated by the arrows f1, f2, f3 visible in FIGS. 2 and 3.
- This overpressure of the cavity 15 can be obtained despite a certain loss of cold air to the outside at the periphery of the gate 17 (see arrows 39a, 39b).
- the hot air generated by the turbojet engine 7 encounters a pressure barrier preventing it from migrating toward the cavity 15. In this way it is possible to maintain this cavity 15 as well as all the organs that are there at a relatively low temperature, which prevents any deterioration of these organs.
- the precepts of the invention can be applied to a rear section of gondola with thrust reverser, as in the case described above, but also and more generally to a rear section of nacelle equipped with an inverter thrust door or even a rear section of nacelle devoid of thrust reverser.
- the invention is not limited to the embodiment described and shown above, provided as a simple example.
- the pipes 29 comprise a part extending inside the cold air duct 31, this part then being provided with a plurality of orifices (at the way of a piccolo tube) allowing the collection of cold air.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Wind Motors (AREA)
- Toys (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)
Abstract
Description
Claims
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI0813035-3A2A BRPI0813035A2 (pt) | 2007-08-20 | 2008-06-16 | "seção traseira de nacela de avião e nacela de avião" |
| CA2696358A CA2696358C (fr) | 2007-08-20 | 2008-06-16 | Troncon arriere de nacelle d'aeronef, et nacelle equipee d'un tel troncon arriere |
| AT08828037T ATE496827T1 (de) | 2007-08-20 | 2008-06-16 | Heckteil einer flugzeuggondel und mit einem solchen heckteil ausgestattete flugzeuggondel |
| CN200880102869.XA CN101784443B (zh) | 2007-08-20 | 2008-06-16 | 飞行器短舱的尾段以及配备这种尾段的短舱 |
| US12/673,288 US8943793B2 (en) | 2007-08-20 | 2008-06-16 | Rear section of aircraft nacelle and nacelle equipped with such rear section |
| DE602008004781T DE602008004781D1 (de) | 2007-08-20 | 2008-06-16 | Heckteil einer flugzeuggondel und mit einem solchen heckteil ausgestattete flugzeuggondel |
| EP08828037A EP2178752B1 (fr) | 2007-08-20 | 2008-06-16 | Tronçon arriere de nacelle d'aeronef, et nacelle equipee d'un tel tronçon arriere |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0705896 | 2007-08-20 | ||
| FR0705896A FR2920132B1 (fr) | 2007-08-20 | 2007-08-20 | Troncon arriere de nacelle d'aeronef et nacelle equipee d'un tel troncon arriere |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009024657A1 true WO2009024657A1 (fr) | 2009-02-26 |
Family
ID=39227081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2008/000835 Ceased WO2009024657A1 (fr) | 2007-08-20 | 2008-06-16 | Tronçon arriere de nacelle d'aeronef, et nacelle equipee d'un tel tronçon arriere |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US8943793B2 (fr) |
| EP (1) | EP2178752B1 (fr) |
| CN (1) | CN101784443B (fr) |
| AT (1) | ATE496827T1 (fr) |
| BR (1) | BRPI0813035A2 (fr) |
| CA (1) | CA2696358C (fr) |
| DE (1) | DE602008004781D1 (fr) |
| ES (1) | ES2357874T3 (fr) |
| FR (1) | FR2920132B1 (fr) |
| RU (1) | RU2456213C2 (fr) |
| WO (1) | WO2009024657A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3081799B1 (fr) * | 2015-04-14 | 2019-08-07 | Rolls-Royce Deutschland Ltd & Co KG | Turbomachine équipée d'un système de conduit de fluide |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4679750A (en) * | 1984-06-20 | 1987-07-14 | The Boeing Company | Latch system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4926633A (en) * | 1989-06-27 | 1990-05-22 | The United States Of America As Represented By The Secretary Of The Air Force | Coolant pressure regulating apparatus |
| FR2757823B1 (fr) * | 1996-12-26 | 1999-03-12 | Aerospatiale | Nacelle de turboreacteur a ecoulement laminaire |
| US6584763B2 (en) * | 2001-08-01 | 2003-07-01 | Rohr, Inc. | Lock for the translating sleeve of a turbofan engine thrust reverser |
| FR2830051B1 (fr) * | 2001-09-27 | 2003-11-07 | Hurel Hispano Le Havre | Systeme de verrouillage sur un inverseur de poussee a grilles |
| US6848651B2 (en) * | 2002-10-07 | 2005-02-01 | Honeywell International Inc. | Electro-hydraulic thrust reverser lock actuation system and method |
| US7216475B2 (en) * | 2003-11-21 | 2007-05-15 | General Electric Company | Aft FLADE engine |
| US7762057B2 (en) * | 2007-06-05 | 2010-07-27 | The Boeing Company | Internal mixing of a portion of fan exhaust flow and full core exhaust flow in aircraft turbofan engines |
-
2007
- 2007-08-20 FR FR0705896A patent/FR2920132B1/fr not_active Expired - Fee Related
-
2008
- 2008-06-16 ES ES08828037T patent/ES2357874T3/es active Active
- 2008-06-16 DE DE602008004781T patent/DE602008004781D1/de active Active
- 2008-06-16 RU RU2010109813/11A patent/RU2456213C2/ru not_active IP Right Cessation
- 2008-06-16 BR BRPI0813035-3A2A patent/BRPI0813035A2/pt not_active IP Right Cessation
- 2008-06-16 CA CA2696358A patent/CA2696358C/fr not_active Expired - Fee Related
- 2008-06-16 CN CN200880102869.XA patent/CN101784443B/zh not_active Expired - Fee Related
- 2008-06-16 EP EP08828037A patent/EP2178752B1/fr active Active
- 2008-06-16 WO PCT/FR2008/000835 patent/WO2009024657A1/fr not_active Ceased
- 2008-06-16 AT AT08828037T patent/ATE496827T1/de not_active IP Right Cessation
- 2008-06-16 US US12/673,288 patent/US8943793B2/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4679750A (en) * | 1984-06-20 | 1987-07-14 | The Boeing Company | Latch system |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2357874T3 (es) | 2011-05-03 |
| FR2920132B1 (fr) | 2009-09-18 |
| US8943793B2 (en) | 2015-02-03 |
| FR2920132A1 (fr) | 2009-02-27 |
| CA2696358C (fr) | 2015-02-24 |
| CN101784443A (zh) | 2010-07-21 |
| CN101784443B (zh) | 2013-04-24 |
| DE602008004781D1 (de) | 2011-03-10 |
| CA2696358A1 (fr) | 2009-02-26 |
| EP2178752A1 (fr) | 2010-04-28 |
| RU2456213C2 (ru) | 2012-07-20 |
| ATE496827T1 (de) | 2011-02-15 |
| US20120000179A1 (en) | 2012-01-05 |
| RU2010109813A (ru) | 2011-09-27 |
| BRPI0813035A2 (pt) | 2014-12-23 |
| EP2178752B1 (fr) | 2011-01-26 |
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