FR3105553B1 - Système de traitement acoustique à au moins deux degrés de liberté comportant un revêtement quart d’onde permettant le passage d’ondes acoustiques dans un résonateur à mode de cavité - Google Patents

Système de traitement acoustique à au moins deux degrés de liberté comportant un revêtement quart d’onde permettant le passage d’ondes acoustiques dans un résonateur à mode de cavité Download PDF

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Publication number
FR3105553B1
FR3105553B1 FR1915072A FR1915072A FR3105553B1 FR 3105553 B1 FR3105553 B1 FR 3105553B1 FR 1915072 A FR1915072 A FR 1915072A FR 1915072 A FR1915072 A FR 1915072A FR 3105553 B1 FR3105553 B1 FR 3105553B1
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FR
France
Prior art keywords
quarter
wave
acoustic
freedom
degrees
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.)
Active
Application number
FR1915072A
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English (en)
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FR3105553A1 (fr
Inventor
Wolfgang Brochard
Florent Mercat
Bastian Sabathier
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Airbus Operations SAS
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Airbus Operations SAS
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Publication date
Application filed by Airbus Operations SAS filed Critical Airbus Operations SAS
Priority to FR1915072A priority Critical patent/FR3105553B1/fr
Publication of FR3105553A1 publication Critical patent/FR3105553A1/fr
Application granted granted Critical
Publication of FR3105553B1 publication Critical patent/FR3105553B1/fr
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Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/172Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D33/00Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
    • B64D33/04Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of exhaust outlets or jet pipes
    • B64D33/06Silencing exhaust or propulsion jets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00Silencing apparatus characterised by method of silencing
    • F01N1/02Silencing apparatus characterised by method of silencing by using resonance
    • F01N1/023Helmholtz resonators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02KJET-PROPULSION PLANTS
    • F02K1/00Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
    • F02K1/04Mounting of an exhaust cone in the jet pipe
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02KJET-PROPULSION PLANTS
    • F02K1/00Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
    • F02K1/78Other construction of jet pipes
    • F02K1/82Jet pipe walls, e.g. liners
    • F02K1/827Sound absorbing structures or liners
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/161Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00Geometry
    • F05D2250/20Three-dimensional
    • F05D2250/28Three-dimensional patterned
    • F05D2250/283Three-dimensional patterned honeycomb
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00Function
    • F05D2260/96Preventing, counteracting or reducing vibration or noise
    • F05D2260/963Preventing, counteracting or reducing vibration or noise by Helmholtz resonators

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Fluid Mechanics (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

L’invention porte sur un système de traitement acoustique (10) à au moins deux degrés de liberté comportant un revêtement quart d’onde (11), comportant des alvéoles (7) formant des résonateurs quart d’onde ménagées dans une épaisseur du revêtement quart d’onde (11) entre une face d’entrée et une peau arrière (13). La peau arrière (13) permet le passage d’ondes acoustiques dans une cavité (14) d’un dispositif du type résonateur de Helmholtz, de sorte que tout ou partie des ondes acoustiques entrant dans ladite cavité (14) y pénètrent en traversant l’épaisseur du revêtement quart d’onde (11). Cela permet un traitement acoustique de plusieurs plages de fréquences ou d’une large plage de fréquences par traitement de plusieurs plages qui se recouvrent, grâce à la mise en œuvre de plusieurs modes d’amortissement des ondes, avec un système de dimensions, et notamment de surface, réduites. Une application préférentielle est constituée par les groupes propulsifs d’aéronef, notamment leurs cônes de sortie ou leurs nacelles. Figure pour l’abrégé : Fig. 4
FR1915072A 2019-12-20 2019-12-20 Système de traitement acoustique à au moins deux degrés de liberté comportant un revêtement quart d’onde permettant le passage d’ondes acoustiques dans un résonateur à mode de cavité Active FR3105553B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR1915072A FR3105553B1 (fr) 2019-12-20 2019-12-20 Système de traitement acoustique à au moins deux degrés de liberté comportant un revêtement quart d’onde permettant le passage d’ondes acoustiques dans un résonateur à mode de cavité

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1915072 2019-12-20
FR1915072A FR3105553B1 (fr) 2019-12-20 2019-12-20 Système de traitement acoustique à au moins deux degrés de liberté comportant un revêtement quart d’onde permettant le passage d’ondes acoustiques dans un résonateur à mode de cavité

Publications (2)

Publication Number Publication Date
FR3105553A1 FR3105553A1 (fr) 2021-06-25
FR3105553B1 true FR3105553B1 (fr) 2022-01-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR1915072A Active FR3105553B1 (fr) 2019-12-20 2019-12-20 Système de traitement acoustique à au moins deux degrés de liberté comportant un revêtement quart d’onde permettant le passage d’ondes acoustiques dans un résonateur à mode de cavité

Country Status (1)

Country Link
FR (1) FR3105553B1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4137992A (en) * 1976-12-30 1979-02-06 The Boeing Company Turbojet engine nozzle for attenuating core and turbine noise
US7784283B2 (en) * 2006-05-03 2010-08-31 Rohr, Inc. Sound-absorbing exhaust nozzle center plug
FR2960334B1 (fr) * 2010-05-19 2012-08-03 Snecma Panneau de traitement acoustique multicouches
DE102011008921A1 (de) * 2011-01-19 2012-07-19 Rolls-Royce Deutschland Ltd & Co Kg Gasturbinenabgaskonus

Also Published As

Publication number Publication date
FR3105553A1 (fr) 2021-06-25

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