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 PDFInfo
- 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
- Authority
- 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
Links
- 239000011248 coating agent Substances 0.000 title abstract 4
- 238000000576 coating method Methods 0.000 title abstract 4
- 238000013016 damping Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods 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
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
-
- 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
- B64D33/04—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of exhaust outlets or jet pipes
- B64D33/06—Silencing exhaust or propulsion jets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
- F01N1/023—Helmholtz resonators
-
- 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
- F02K1/04—Mounting of an exhaust cone in the jet pipe
-
- 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
- F02K1/78—Other construction of jet pipes
- F02K1/82—Jet pipe walls, e.g. liners
- F02K1/827—Sound absorbing structures or liners
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods 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
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/161—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general in systems with fluid flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/20—Three-dimensional
- F05D2250/28—Three-dimensional patterned
- F05D2250/283—Three-dimensional patterned honeycomb
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/96—Preventing, counteracting or reducing vibration or noise
- F05D2260/963—Preventing, counteracting or reducing vibration or noise by Helmholtz resonators
Landscapes
- 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
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
ID=70008765
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)
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 |
-
2019
- 2019-12-20 FR FR1915072A patent/FR3105553B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
FR3105553A1 (fr) | 2021-06-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR3065472A1 (fr) | Panneau pour le traitement acoustique comprenant une structure acoustiquement resistive poreuse comportant des canaux de connexion | |
US20190257799A1 (en) | Inspection devices and related systems and methods | |
FR3105553B1 (fr) | 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 | |
CN104795061B (zh) | 宽带单向传声通道 | |
AR062761A1 (es) | Metodo y equipo para detectar deficiencias de sellado en sistemas de desague y ventilacion para un edificio | |
FR3070529B1 (fr) | Panneau acoustique a resonateurs pour volume reduit | |
Garnier et al. | Coupled paraxial wave equations in random media in the white-noise regime | |
Sapozhnikov | An exact solution to the Helmholtz equation for a quasi-Gaussian beam in the form of a superposition of two sources and sinks with complex coordinates | |
Bychkov et al. | On the possible mechanism of the jet noise intensification near a wing | |
EP3839238A1 (fr) | Cône de sortie d'un ensemble propulsif d'aéronef formant un système de traitement acoustique à au moins deux degrés de liberté | |
FR3044295B1 (fr) | Dispositif formant un bord de fuite d'un profil aerodynamique et comportant un systeme de soufflage | |
FR3085437B1 (fr) | Structure d’entree d’air d’une nacelle d’aeronef | |
Carrier et al. | The reflection of obliquely incident tsunamis | |
EP3660299A1 (fr) | Structure d'absorption acoustique comprenant un système de drainage de liquide et ensemble propulsif comportant une telle structure d'absorption acoustique | |
FR3061933B1 (fr) | Structure interne d'un conduit d'ejection primaire | |
Gayen et al. | Water wave diffraction by a surface strip | |
Li et al. | Study of the effect of microstructure on ultrasonic signal attenuation | |
Pisarev et al. | Influence of the shape of the sound-absorbing construction cells on their acoustic efficiency in the linear and nonlinear operation modes | |
Yu et al. | Design of sandwich acoustic window for sonar dome. | |
Burgschweiger et al. | High-performance calculation of the acoustic backscattering strength based on the Kirchhoff high-frequency approximation | |
Wang et al. | Research on Reverberation Signal under Ice Based on Physical Acoustic Modeling and Its Related Characteristics | |
Danilov | Scattering of elastic pulses by a crack | |
Su et al. | An elastic wave enhancement method based on modified bright point model | |
Mulyaningsih | Effect of Amplitude and Frequency on the Speed of Sound Waves in Air and Water Using PhET Simulation | |
Büyük | Experiment on fast scoring for GMM based speaker verification |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PLFP | Fee payment |
Year of fee payment: 2 |
|
PLSC | Publication of the preliminary search report |
Effective date: 20210625 |
|
PLFP | Fee payment |
Year of fee payment: 3 |
|
PLFP | Fee payment |
Year of fee payment: 4 |
|
PLFP | Fee payment |
Year of fee payment: 5 |