FR3069849B1 - TURBOREACTOR NOISE REDUCTION DEVICE INCLUDING ACOUSTIC INTERFERENCE CHANNELS - Google Patents

TURBOREACTOR NOISE REDUCTION DEVICE INCLUDING ACOUSTIC INTERFERENCE CHANNELS Download PDF

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Publication number
FR3069849B1
FR3069849B1 FR1757365A FR1757365A FR3069849B1 FR 3069849 B1 FR3069849 B1 FR 3069849B1 FR 1757365 A FR1757365 A FR 1757365A FR 1757365 A FR1757365 A FR 1757365A FR 3069849 B1 FR3069849 B1 FR 3069849B1
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France
Prior art keywords
duct
exposed
pipe
acoustic interference
turboreactor
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Application number
FR1757365A
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French (fr)
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FR3069849A1 (en
Inventor
Norman Bruno Andre Jodet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aircraft Engines SAS
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Safran Aircraft Engines SAS
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Application filed by Safran Aircraft Engines SAS filed Critical Safran Aircraft Engines SAS
Priority to FR1757365A priority Critical patent/FR3069849B1/en
Publication of FR3069849A1 publication Critical patent/FR3069849A1/en
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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
    • 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
    • B64D33/02—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes
    • B64D2033/0206—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes comprising noise reduction means, e.g. acoustic liners

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne un dispositif de réduction du bruit généré par les flux d'air liés au fonctionnement d'un ensemble propulsif pour avion, ledit ensemble propulsif comprenant une première conduite de turboréacteur exposée à un flux d'air et une deuxième conduite de turboréacteur également exposée à un flux d'air, la première conduite étant identique et non coaxiale à la deuxième conduite, caractérisé en ce qu'il comprend un ensemble de canaux d'interférence acoustique, chaque canal d'interférence reliant un premier point de la première conduite exposé à des fluctuations de pression avec un deuxième point correspondant de la deuxième conduite destiné à être exposé dans le temps à des fluctuations de pression similaires, et permettant la propagation des ondes acoustiques, de manière à mettre en communication les fluctuations de pression entre le premier point et le deuxième point correspondant au sein de la première conduite et de la deuxième conduite respectivement, réalisant ainsi des interférences acoustiques destructives.The invention relates to a device for reducing the noise generated by the air flows associated with the operation of a propulsion unit for an airplane, said propulsion unit comprising a first turbojet duct exposed to an air flow and a second turbojet duct. also exposed to a flow of air, the first duct being identical and not coaxial with the second duct, characterized in that it comprises a set of acoustic interference channels, each interference channel connecting a first point of the first pipe exposed to pressure fluctuations with a second corresponding point of the second pipe intended to be exposed over time to similar pressure fluctuations, and allowing the propagation of acoustic waves, so as to communicate the pressure fluctuations between the first point and the second corresponding point within the first pipe and the second pipe respectively, thus realizing d destructive acoustic interference.

FR1757365A 2017-08-01 2017-08-01 TURBOREACTOR NOISE REDUCTION DEVICE INCLUDING ACOUSTIC INTERFERENCE CHANNELS Active FR3069849B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1757365A FR3069849B1 (en) 2017-08-01 2017-08-01 TURBOREACTOR NOISE REDUCTION DEVICE INCLUDING ACOUSTIC INTERFERENCE CHANNELS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1757365 2017-08-01
FR1757365A FR3069849B1 (en) 2017-08-01 2017-08-01 TURBOREACTOR NOISE REDUCTION DEVICE INCLUDING ACOUSTIC INTERFERENCE CHANNELS

Publications (2)

Publication Number Publication Date
FR3069849A1 FR3069849A1 (en) 2019-02-08
FR3069849B1 true FR3069849B1 (en) 2020-08-28

Family

ID=60081006

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1757365A Active FR3069849B1 (en) 2017-08-01 2017-08-01 TURBOREACTOR NOISE REDUCTION DEVICE INCLUDING ACOUSTIC INTERFERENCE CHANNELS

Country Status (1)

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FR (1) FR3069849B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951566A (en) * 1973-12-11 1976-04-20 Electricite De France (Service National) Axial-flow fan with by-pass pipe or pipes
US8033358B2 (en) * 2007-04-26 2011-10-11 Lord Corporation Noise controlled turbine engine with aircraft engine adaptive noise control tubes
FR2998267B1 (en) * 2012-11-16 2016-03-04 Snecma NACELLE FOR TURBOREACTOR
GB2544625B (en) * 2015-10-05 2021-09-22 Safran Aircraft Engines Aircraft with a propulsion unit with offset fan

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Publication number Publication date
FR3069849A1 (en) 2019-02-08

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