GB201204586D0 - Seamless acoustic liner - Google Patents

Seamless acoustic liner

Info

Publication number
GB201204586D0
GB201204586D0 GBGB1204586.0A GB201204586A GB201204586D0 GB 201204586 D0 GB201204586 D0 GB 201204586D0 GB 201204586 A GB201204586 A GB 201204586A GB 201204586 D0 GB201204586 D0 GB 201204586D0
Authority
GB
United Kingdom
Prior art keywords
layer
face
composite material
acoustic panel
acoustic liner
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.)
Granted
Application number
GBGB1204586.0A
Other versions
GB2486120B (en
GB2486120A (en
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.)
GKN Aerospace Services Ltd
Original Assignee
GKN Aerospace Services Ltd
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 GKN Aerospace Services Ltd filed Critical GKN Aerospace Services Ltd
Priority to GB1204586.0A priority Critical patent/GB2486120B/en
Publication of GB201204586D0 publication Critical patent/GB201204586D0/en
Publication of GB2486120A publication Critical patent/GB2486120A/en
Application granted granted Critical
Publication of GB2486120B publication Critical patent/GB2486120B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

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    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/08—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers
    • B29C70/088—Fibrous reinforcements only comprising combinations of different forms of fibrous reinforcements incorporated in matrix material, forming one or more layers, and with or without non-reinforced layers and with one or more layers of non-plastics material or non-specified material, e.g. supports
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    • B29C70/28—Shaping operations therefor
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    • 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
    • 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
    • B64D2033/0266—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes specially adapted for particular type of power plants
    • B64D2033/0286—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes specially adapted for particular type of power plants for turbofan engines
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • 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
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/612—Foam
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Landscapes

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

Abstract

A composite acoustic panel employed in an inlet passage of a gas turbine engine or turbofan engine of the type fitted to commercial aircraft and comprises a permeable face-layer 8 made of a composite material, an impermeable backing sheet 9 made of a composite material and a sound absorbing layer 10 which may be a metallic foam or metallic honeycomb structure. It is manufactured by a double polymerisation process for the face- layer and the remainder of the acoustic panel and finally a perforation step, such as by drilling spindles or laser to perforate the face-layer according to a pre-determined perforation distribution
GB1204586.0A 2010-03-02 2010-03-02 Seamless acoustic liner Active GB2486120B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1204586.0A GB2486120B (en) 2010-03-02 2010-03-02 Seamless acoustic liner

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Application Number Priority Date Filing Date Title
GB1204586.0A GB2486120B (en) 2010-03-02 2010-03-02 Seamless acoustic liner

Publications (3)

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GB201204586D0 true GB201204586D0 (en) 2012-05-02
GB2486120A GB2486120A (en) 2012-06-06
GB2486120B GB2486120B (en) 2012-10-31

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Publication number Priority date Publication date Assignee Title
SE536860C2 (en) 2012-02-23 2014-10-07 Noisetech Hb A sound absorber
NL2012692B1 (en) 2014-04-25 2016-07-18 Fokker Aerostructures Bv Panel from laminates, as well as method for manufacturing them.
DE102015113685B4 (en) 2014-11-27 2020-08-06 East-4D Carbon Technology Gmbh Air control and noise protection device in a two-stream jet engine and method for its assembly
US9447576B2 (en) * 2015-01-09 2016-09-20 Rohr, Inc. Post bond perforation of a septum in an acoustic panel
GB201521075D0 (en) * 2015-11-30 2016-01-13 Short Brothers Plc Methods, precursors and abrasive blasting masks for manufacturing noise attenuating devices
WO2018034949A1 (en) * 2016-08-19 2018-02-22 3M Innovative Properties Company Sound-absorbing panels comprising a core consisting of connected cells, wherein some of the cell walls have openings
US11027372B2 (en) * 2018-01-10 2021-06-08 Rohr, Inc. Controlling perforating of an acoustic panel based on sensed optical emissions
US20200291645A1 (en) * 2019-03-11 2020-09-17 Rohr, Inc. Acoustic panel
FR3095369B1 (en) * 2019-04-29 2023-04-07 Airbus Operations Sas Method for manufacturing a sound-absorbing structure using at least one conforming plate, sound-absorbing structure obtained from said process and aircraft comprising said sound-absorbing structure
US11260641B2 (en) 2019-05-10 2022-03-01 American Honda Motor Co., Inc. Apparatus for reticulation of adhesive and methods of use thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256611B (en) * 1991-06-13 1995-05-31 British Aerospace Manufacture of perforated composite structures
FR2927271B1 (en) * 2008-02-08 2010-07-30 Aircelle Sa METHOD FOR DRILLING AN ACOUSTIC PIECE OF A NACELLE OF AN AIRCRAFT

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GB2486120B (en) 2012-10-31
GB2486120A (en) 2012-06-06

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