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GB2005384A - Multi-layer acoustic lining - Google Patents

Multi-layer acoustic lining

Info

Publication number
GB2005384A
GB2005384A GB7836770A GB7836770A GB2005384A GB 2005384 A GB2005384 A GB 2005384A GB 7836770 A GB7836770 A GB 7836770A GB 7836770 A GB7836770 A GB 7836770A GB 2005384 A GB2005384 A GB 2005384A
Authority
GB
United Kingdom
Prior art keywords
sheet
lining
resonators
overlies
apertured
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.)
Withdrawn
Application number
GB7836770A
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB7836770A priority Critical patent/GB2005384A/en
Publication of GB2005384A publication Critical patent/GB2005384A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/24—Heat or noise insulation
    • 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
    • G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Laminated Bodies (AREA)

Abstract

The lining for a fluid-flow duct, e.g. of a gas turbine engine, incorporates resonators of the Helmholtz type, the resonator necks of which define apertures 7 in a sheet which overlies the resonators. A sound permeable facing sheet 10 overlies the apertured sheet to provide an aerodynamically smoother flow surface for the lining. In order to minimise the combined acoustic resistance of the apertured sheet and the facing sheet 10, the latter is spaced away from the former by a small distance, e.g. by elements 8. <IMAGE>
GB7836770A 1977-10-04 1978-09-14 Multi-layer acoustic lining Withdrawn GB2005384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7836770A GB2005384A (en) 1977-10-04 1978-09-14 Multi-layer acoustic lining

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4113477 1977-10-04
GB7836770A GB2005384A (en) 1977-10-04 1978-09-14 Multi-layer acoustic lining

Publications (1)

Publication Number Publication Date
GB2005384A true GB2005384A (en) 1979-04-19

Family

ID=26264596

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7836770A Withdrawn GB2005384A (en) 1977-10-04 1978-09-14 Multi-layer acoustic lining

Country Status (1)

Country Link
GB (1) GB2005384A (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4318453A (en) * 1979-09-17 1982-03-09 Rohr Industries, Inc. Double layer attenuation panel
WO1985002640A1 (en) * 1983-12-12 1985-06-20 Lockheed Corporation Sound barrier
DE3504208A1 (en) * 1985-02-07 1986-08-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München MUFFLER BOX
JPS62500920A (en) * 1984-12-10 1987-04-16 サンドストランド・コ−ポレ−ション Centrifugal deaerator/pump
DE3807128A1 (en) * 1988-03-04 1989-09-14 Fraunhofer Ges Forschung SOUND ABSORBING WALL ELEMENT
EP0700030A3 (en) * 1994-08-31 1996-04-24 Mitsubishi Electric Home Appl Sound absorbing mechanism using a porous material
WO2005091272A1 (en) * 2004-03-17 2005-09-29 Eads Deutschland Gmbh Assembly for reducing noise in turbofan engines
EP1612769A3 (en) * 2004-06-28 2009-03-25 United Technologies Corporation High admittance acoustic liner
EP1752637A3 (en) * 2005-08-10 2009-10-28 United Technologies Corporation Architecture for an acoustic liner
FR2962586A1 (en) * 2010-07-09 2012-01-13 Airbus Operations Sas Panel for performing acoustic treatment in nacelle of aircraft, has resistive layer whose face is in contact with air flow in honeycomb structure and reflecting layer, and openings form angle with layer lower than specific degree
WO2012097998A1 (en) * 2011-01-19 2012-07-26 Rolls-Royce Deutschland Ltd & Co Kg Sound absorber for a gas turbine exhaust cone, and method for the production thereof
DE102011120979A1 (en) * 2011-12-13 2013-06-13 Rolls-Royce Deutschland Ltd & Co Kg Acoustic absorber
WO2013156739A1 (en) * 2012-04-20 2013-10-24 Aircelle Thin panel for absorbing sound waves emitted by a turbofan of an aircraft nacelle, and nacelle provided with such a panel
WO2015026421A3 (en) * 2013-07-29 2015-04-09 The Boeing Company Septumization of honeycomb sandwiches
EP2487677A4 (en) * 2010-01-08 2016-03-02 Chinese Acad Inst Acoustics Compound sound absorption device with built-in resonant cavity
FR3065472A1 (en) * 2017-04-25 2018-10-26 Airbus Operations PANEL FOR ACOUSTIC PROCESSING COMPRISING AN ACOUSTICALLY RESISTIVE POROUS STRUCTURE HAVING CONNECTION CHANNELS
US10940935B2 (en) 2017-04-25 2021-03-09 Airbus Operations (S.A.S.) Acoustic treatment panel comprising cells which each contain a plurality of conduits
EP3799030A1 (en) * 2019-09-26 2021-03-31 Rolls-Royce Deutschland Ltd & Co KG Acoustic liner and gas turbine engine with such acoustic liner
WO2021082706A1 (en) * 2019-10-29 2021-05-06 同济大学 Helmholtz resonator, and low-frequency broadband sound-absorbing and noise-reducing structure based on same
EP3706114A4 (en) * 2018-11-15 2021-07-28 CRRC Zhuzhou Locomotive Co., Ltd. Low-frequency coupling sound absorbing structure
EP3896269A1 (en) * 2020-04-13 2021-10-20 Raytheon Technologies Corporation Improved airfoil-mounted resonator
EP3916717A1 (en) * 2020-05-29 2021-12-01 Airbus Operations (S.A.S.) Honeycomb soundproofing structure including a diaphragm provided with a tube configured to process different acoustic frequencies, method for manufacturing such a honeycomb soundproofing structure, and associated tool
FR3111002A1 (en) * 2020-05-29 2021-12-03 Airbus Operations Manufacturing process of a soundproofing honeycomb structure including a diaphragm, and soundproofing honeycomb structure obtained
EP4239626A4 (en) * 2020-10-30 2024-09-25 Japan Aerospace Exploration Pressure fluctuation absorbing structural body

Cited By (47)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4318453A (en) * 1979-09-17 1982-03-09 Rohr Industries, Inc. Double layer attenuation panel
WO1985002640A1 (en) * 1983-12-12 1985-06-20 Lockheed Corporation Sound barrier
JPS62500920A (en) * 1984-12-10 1987-04-16 サンドストランド・コ−ポレ−ション Centrifugal deaerator/pump
DE3504208A1 (en) * 1985-02-07 1986-08-07 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V., 8000 München MUFFLER BOX
WO1986004668A1 (en) * 1985-02-07 1986-08-14 Fraunhofer-Gesellschaft Zur Förderung Der Angewand Sound attenuation box
US4787473A (en) * 1985-02-07 1988-11-29 Fraunhofer Gesellschaft Sound attenuating box
DE3807128A1 (en) * 1988-03-04 1989-09-14 Fraunhofer Ges Forschung SOUND ABSORBING WALL ELEMENT
US5905234A (en) * 1994-08-31 1999-05-18 Mitsubishi Electric Home Appliance Co., Ltd. Sound absorbing mechanism using a porous material
EP0700030A3 (en) * 1994-08-31 1996-04-24 Mitsubishi Electric Home Appl Sound absorbing mechanism using a porous material
US6109388A (en) * 1994-08-31 2000-08-29 Mitsubishi Electric Home Appliance Co., Ltd. Sound absorbing mechanism using a porous material
WO2005091272A1 (en) * 2004-03-17 2005-09-29 Eads Deutschland Gmbh Assembly for reducing noise in turbofan engines
JP2007529666A (en) * 2004-03-17 2007-10-25 エーアーデーエス・ドイッチェランド・ゲゼルシャフト ミット ベシュレンクテル ハフツング Noise reduction structure in turbofan engine
US7819224B2 (en) 2004-03-17 2010-10-26 Eads Deutschland Gmbh Assembly for reducing noise in turbofan engines
JP4659021B2 (en) * 2004-03-17 2011-03-30 エーアーデーエス・ドイッチェランド・ゲゼルシャフト ミット ベシュレンクテル ハフツング Noise reduction structure in turbofan engine
EP1612769A3 (en) * 2004-06-28 2009-03-25 United Technologies Corporation High admittance acoustic liner
EP1752637A3 (en) * 2005-08-10 2009-10-28 United Technologies Corporation Architecture for an acoustic liner
EP2487677A4 (en) * 2010-01-08 2016-03-02 Chinese Acad Inst Acoustics Compound sound absorption device with built-in resonant cavity
FR2962586A1 (en) * 2010-07-09 2012-01-13 Airbus Operations Sas Panel for performing acoustic treatment in nacelle of aircraft, has resistive layer whose face is in contact with air flow in honeycomb structure and reflecting layer, and openings form angle with layer lower than specific degree
US8783412B2 (en) 2011-01-19 2014-07-22 Rolls-Royce Deutschland Ltd & Co Kg Sound absorber for a gas turbine exhaust cone, and method for the production thereof
WO2012097998A1 (en) * 2011-01-19 2012-07-26 Rolls-Royce Deutschland Ltd & Co Kg Sound absorber for a gas turbine exhaust cone, and method for the production thereof
US8689936B2 (en) 2011-12-13 2014-04-08 Rolls-Royce Deutschland Ltd & Co Kg Acoustic absorber having conical inserts
DE102011120979A1 (en) * 2011-12-13 2013-06-13 Rolls-Royce Deutschland Ltd & Co Kg Acoustic absorber
FR2989814A1 (en) * 2012-04-20 2013-10-25 Aircelle Sa THIN ACOUSTIC WAVE ABSORPTION PANEL EMITTED BY AN AIRCRAFT NACELLE TURBOJET, AND NACELLE EQUIPPED WITH SUCH A PANEL
CN104246868A (en) * 2012-04-20 2014-12-24 埃尔塞乐公司 Thin panel for absorbing sound waves emitted by a turbofan of an aircraft nacelle, and nacelle provided with such a panel
WO2013156739A1 (en) * 2012-04-20 2013-10-24 Aircelle Thin panel for absorbing sound waves emitted by a turbofan of an aircraft nacelle, and nacelle provided with such a panel
US10363726B2 (en) 2013-07-29 2019-07-30 The Boeing Company Septumization of honeycomb sandwiches
WO2015026421A3 (en) * 2013-07-29 2015-04-09 The Boeing Company Septumization of honeycomb sandwiches
US9643392B2 (en) 2013-07-29 2017-05-09 The Boeing Company Septumization of honeycomb sandwiches
CN108725748B (en) * 2017-04-25 2021-04-23 空中客车运营简化股份公司 Acoustic treatment panel and aircraft
EP3395675A1 (en) * 2017-04-25 2018-10-31 Airbus Operations (S.A.S) Acoustic treatment panel comprising a porous, acoustically resistive structure including connecting channels
US10940935B2 (en) 2017-04-25 2021-03-09 Airbus Operations (S.A.S.) Acoustic treatment panel comprising cells which each contain a plurality of conduits
FR3065472A1 (en) * 2017-04-25 2018-10-26 Airbus Operations PANEL FOR ACOUSTIC PROCESSING COMPRISING AN ACOUSTICALLY RESISTIVE POROUS STRUCTURE HAVING CONNECTION CHANNELS
US11027817B2 (en) 2017-04-25 2021-06-08 Airbus Operations (S.A.S.) Acoustic treatment panel comprising a porous acoustically resistive structure comprising connecting canals
CN108725748A (en) * 2017-04-25 2018-11-02 空中客车运营简化股份公司 acoustic treatment panel and aircraft
EP3706114A4 (en) * 2018-11-15 2021-07-28 CRRC Zhuzhou Locomotive Co., Ltd. Low-frequency coupling sound absorbing structure
EP3799030A1 (en) * 2019-09-26 2021-03-31 Rolls-Royce Deutschland Ltd & Co KG Acoustic liner and gas turbine engine with such acoustic liner
US12134996B2 (en) 2019-09-26 2024-11-05 Rolls-Royce Deutschland Ltd & Co Kg Acoustic liner and gas turbine engine with such acoustic liner
US12118973B2 (en) 2019-10-29 2024-10-15 Tongji University Helmholtz resonator and low-frequency broadband sound-absorbing and noise-reducing structure based on the same
WO2021082706A1 (en) * 2019-10-29 2021-05-06 同济大学 Helmholtz resonator, and low-frequency broadband sound-absorbing and noise-reducing structure based on same
EP3896269A1 (en) * 2020-04-13 2021-10-20 Raytheon Technologies Corporation Improved airfoil-mounted resonator
US11199107B2 (en) 2020-04-13 2021-12-14 Raytheon Technologies Corporation Airfoil-mounted resonator
FR3111002A1 (en) * 2020-05-29 2021-12-03 Airbus Operations Manufacturing process of a soundproofing honeycomb structure including a diaphragm, and soundproofing honeycomb structure obtained
US11945596B2 (en) 2020-05-29 2024-04-02 Airbus Operations Sas Method for producing an alveolar soundproofing structure including a diaphragm, and alveolar soundproofing structure obtained
US12014714B2 (en) 2020-05-29 2024-06-18 Airbus Operations Sas Cellular sound insulation structure including a diaphragm provided with a tube configured to treat different acoustic frequencies, method for manufacturing such a cellular sound insulation structure, and associated tool
FR3111003A1 (en) * 2020-05-29 2021-12-03 Airbus Operations Soundproofing honeycomb structure including a diaphragm with a tube configured to handle different acoustic frequencies, method of manufacturing such a structure, and associated tool
EP3916717A1 (en) * 2020-05-29 2021-12-01 Airbus Operations (S.A.S.) Honeycomb soundproofing structure including a diaphragm provided with a tube configured to process different acoustic frequencies, method for manufacturing such a honeycomb soundproofing structure, and associated tool
EP4239626A4 (en) * 2020-10-30 2024-09-25 Japan Aerospace Exploration Pressure fluctuation absorbing structural body

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)