Device with secondary jets reducing the noise generated by an aircraft jet engine
IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0935445
(2009-03-31)
|
등록번호 |
US-8393139
(2013-03-12)
|
우선권정보 |
FR-08 52123 (2008-03-31) |
국제출원번호 |
PCT/FR2009/000376
(2009-03-31)
|
§371/§102 date |
20100929
(20100929)
|
국제공개번호 |
WO2009/133273
(2009-11-05)
|
발명자
/ 주소 |
- Huber, Jerome
- Bonnet, Jean-Paul
- Delville, Joel
- Jordan, Peter
- Strekowski, Francois
|
출원인 / 주소 |
- Airbus Operations (S.A.S.)
|
대리인 / 주소 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
2 |
초록
▼
An aircraft jet engine including a wall centered about a longitudinal axis and surrounding a stream of gas ejected at a downstream end of the wall in the direction of the axis, primary ducts distributed at the periphery of the downstream end of the wall configured on command each to eject a jet of p
An aircraft jet engine including a wall centered about a longitudinal axis and surrounding a stream of gas ejected at a downstream end of the wall in the direction of the axis, primary ducts distributed at the periphery of the downstream end of the wall configured on command each to eject a jet of primary fluid to interact with the ejected stream of gas, the primary ducts of each pair converging towards one another near the downstream end of the wall so that the primary jets ejected form two sides of a triangle that meet at the vertex thereof in a view projected onto a plane perpendicular to a transverse plane, and secondary ducts each associated with each pair of primary ducts and configured on command to eject a jet of secondary fluid directed into the triangle formed by the primary jets.
대표청구항
▼
1. An aircraft jet engine, comprising: a wall centered around a longitudinal axis and surrounding a gas stream that is ejected at a downstream end of the wall toward the axis;plural pairs of primary ducts distributed around a periphery of the downstream end of the wall, each configured to eject on c
1. An aircraft jet engine, comprising: a wall centered around a longitudinal axis and surrounding a gas stream that is ejected at a downstream end of the wall toward the axis;plural pairs of primary ducts distributed around a periphery of the downstream end of the wall, each configured to eject on command a primary fluid jet to interact with the ejected gas stream, the primary ducts of each pair converging toward one another close to the downstream end of the wall so that the ejected primary jets form two sides of a triangle that meet at a vertex thereof along a view in projection in a plane perpendicular to a transverse plane of the wall centered around the longitudinal axis,wherein at least one secondary duct is on the same surface as each pair of primary ducts and is configured to eject on command a secondary fluid jet directed into the triangle formed by the primary jets. 2. A jet engine according to claim 1, wherein the at least one secondary duct is arranged between two primary ducts of each pair, aligned with the vertex of the triangle formed by the jets originating therefrom. 3. A jet engine according to claim 1, wherein the at least one secondary duct is arranged centrally between two convergent primary ducts and is configured to eject a fluid jet in a form of a sheet. 4. A jet engine according to claim 3, wherein the at least one secondary duct is configured to eject the fluid jet in a form of a sheet through a rectangular outlet opening that is oriented parallel to a height of the triangle formed by the primary jets. 5. A jet engine according to claim 1, comprising, associated with each primary duct, plural of the secondary ducts disposed side by side and oriented parallel to the associated primary duct. 6. A jet engine according to claim 1, wherein each primary ducts converges toward one another along a converges angle ranging between 40° and 70° along a view in projection in the plane perpendicular to the transverse plane of the wall centered around the longitudinal axis. 7. A jet engine according to claim 1, wherein at least one of the primary or secondary ducts are slanted toward the longitudinal axis along a penetration angle ranging between 8° and 60°. 8. A jet engine according to claim 7, wherein at least one of the associated primary or secondary ducts have various slant angles toward the longitudinal axis. 9. An aircraft jet engine according to claim 1, wherein the primary and secondary ducts are integrated into the wall. 10. An aircraft comprising at least one jet engine according to claim 1. 11. A jet engine according to claim 1, wherein the at least one secondary duct is configured to eject a fluid jet in a form of a sheet through an opening with a width of the cross section being greater than a height of the cross section, and the height being less than half a diameter of an outlet opening of the primary ducts. 12. A jet engine according to claim 1, wherein the primary ducts converge along slanted portions of a chevron, and wherein the at least one secondary duct is configured to pass through a peak of the chevron. 13. A jet engine according to claim 1, wherein the primary ducts can be activated independently of the secondary ducts, and the secondary ducts can be activated independently of the primary ducts. 14. A jet engine according to claim 5, wherein a diameter of the secondary ducts decreases as the ducts come closer to a height of the triangle formed by the primary jets. 15. A jet engine according to claim 1, wherein a weight ratio of the primary and secondary air jets to the ejected stream is between 0.2 and 2%. 16. A jet engine according to claim 1, wherein a speed of the primary and secondary jets is on the same order as a speed of the ejected gas stream. 17. A jet engine according to claim 1, wherein at least one of the primary or secondary jets is activated in a non-steady manner. 18. A jet engine according to claim 1, wherein the primary jets intersect at a distance between 0.2 and 0.5 times a diameter of the downstream end of the wall.
이 특허에 인용된 특허 (2)
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Bonnet, Jean-Paul; Delville, Joel; Jordan, Peter; Laurendeau, Estelle, Aircraft jet engine provided with a device for reducing propulsion jet noise.
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Wright Charles P. (Seattle WA) Thornock Russel L. (Seattle WA), Jet engine multiduct noise suppressor.
이 특허를 인용한 특허 (3)
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Huber, Jerome; Bonnet, Jean Paul; Gomes, Luis; Maury, Remy, Aircraft jet engine comprising a system for reducing the noise generated by the ejection of the gases.
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Bodard, Guillaume; Vuillemin, Alexandre Alfred Gaston, Device for reducing the noise emitted by the jet of an aircraft propulsion engine.
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Alhatim, Omair M., System of support thrust from wasted exhaust.
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