IT1031366B - ACOUSTIC DUCT WITH ASYMMETRIC PA RTIC LARLY ACOUSTIC TREATMENT FOR GAS TURBOMOTORS - Google Patents

ACOUSTIC DUCT WITH ASYMMETRIC PA RTIC LARLY ACOUSTIC TREATMENT FOR GAS TURBOMOTORS

Info

Publication number
IT1031366B
IT1031366B IT19841/75A IT1984175A IT1031366B IT 1031366 B IT1031366 B IT 1031366B IT 19841/75 A IT19841/75 A IT 19841/75A IT 1984175 A IT1984175 A IT 1984175A IT 1031366 B IT1031366 B IT 1031366B
Authority
IT
Italy
Prior art keywords
acoustic
turbomotors
rtic
larly
asymmetric
Prior art date
Application number
IT19841/75A
Other languages
Italian (it)
Original Assignee
Gen Electric
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 Gen Electric filed Critical Gen Electric
Application granted granted Critical
Publication of IT1031366B publication Critical patent/IT1031366B/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • 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
    • 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
    • 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
    • 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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
IT19841/75A 1974-02-15 1975-01-31 ACOUSTIC DUCT WITH ASYMMETRIC PA RTIC LARLY ACOUSTIC TREATMENT FOR GAS TURBOMOTORS IT1031366B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US442893A US3890060A (en) 1974-02-15 1974-02-15 Acoustic duct with asymmetric acoustical treatment

Publications (1)

Publication Number Publication Date
IT1031366B true IT1031366B (en) 1979-04-30

Family

ID=23758566

Family Applications (1)

Application Number Title Priority Date Filing Date
IT19841/75A IT1031366B (en) 1974-02-15 1975-01-31 ACOUSTIC DUCT WITH ASYMMETRIC PA RTIC LARLY ACOUSTIC TREATMENT FOR GAS TURBOMOTORS

Country Status (7)

Country Link
US (1) US3890060A (en)
JP (1) JPS6010168B2 (en)
BE (1) BE825517A (en)
DE (1) DE2504073C2 (en)
FR (1) FR2261583B1 (en)
GB (1) GB1499724A (en)
IT (1) IT1031366B (en)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1483590A (en) * 1973-12-27 1977-08-24 Chrysler Uk Fan assemblies
US4104002A (en) * 1976-12-02 1978-08-01 General Electric Company Spiral strip acoustic treatment
US4989886A (en) * 1988-12-30 1991-02-05 Textron Inc. Braided filamentary sealing element
US5029875A (en) * 1989-07-07 1991-07-09 Textron Inc. Fluid seal structure
JP2630652B2 (en) * 1989-08-09 1997-07-16 三菱電機ホーム機器株式会社 Blower
US5594218A (en) * 1995-01-04 1997-01-14 Northrop Grumman Corporation Anechoic chamber absorber and method
US5709529A (en) * 1995-11-14 1998-01-20 Westinghouse Electric Corporation Optimization of turbomachinery harmonics
US5702231A (en) 1996-08-09 1997-12-30 The Boeing Company Apparatus and method for reducing noise emissions from a gas turbine engine inlet
FR2787513B1 (en) 1998-12-17 2001-01-19 Turbomeca MULTICHANNEL EXHAUST DEVICE FOR ACOUSTICALLY TREATED TURBOMACHINE
SE515528C2 (en) * 1999-12-07 2001-08-20 Saab Ab Device for an acoustic absorbent
FR2820716B1 (en) 2001-02-15 2003-05-30 Eads Airbus Sa PROCESS FOR DEFROSTING BY FORCED CIRCULATION OF A FLUID, OF A REACTION ENGINE AIR INLET COVER AND DEVICE FOR ITS IMPLEMENTATION
FR2820715B1 (en) 2001-02-15 2003-05-30 Eads Airbus Sa PROCESS FOR DEFROSTING AN AIR INTAKE COVER OF A REACTION ENGINE AND DEVICE FOR IMPLEMENTING SAME
US6557799B1 (en) 2001-11-09 2003-05-06 The Boeing Company Acoustic treated thrust reverser bullnose fairing assembly
GB2385378B (en) * 2002-02-14 2005-08-31 Rolls Royce Plc Engine casing
FR2898870B1 (en) * 2006-03-24 2008-05-23 Aircelle Sa AIR INLET VIROLET STRUCTURE
GB0608236D0 (en) * 2006-04-26 2006-06-07 Rolls Royce Plc Aeroengine noise reduction
FR2905734B1 (en) * 2006-09-07 2012-07-13 Airbus France DEVICE FOR ENHANCING THE EFFICIENCY OF ACOUSTIC TREATMENTS IN A CONDUIT OF AN AIRCRAFT ENGINE
US8780550B2 (en) * 2006-09-26 2014-07-15 Hewlett-Packard Development Company, L.P. Dampening acoustic vibrations within an electronic system
US20080110695A1 (en) * 2006-11-15 2008-05-15 Mc Clellan W Thomas High efficiency, frequency-tunable, acoustic wool and method of attenuating acoustic vibrations
DE102007019762A1 (en) * 2007-04-25 2008-10-30 Eads Deutschland Gmbh Soundproofing device for a jet engine or a turbine
JP2009062977A (en) * 2007-08-15 2009-03-26 Rohr Inc Linear acoustic liner
FR2926704B1 (en) * 2008-01-25 2013-02-01 Velecta Paramount SILENCER FOR DRYING APPARATUS AND SILENT HAIR DRYER
DE102011006273A1 (en) 2011-03-28 2012-10-04 Rolls-Royce Deutschland Ltd & Co Kg Rotor of an axial compressor stage of a turbomachine
DE102011006275A1 (en) 2011-03-28 2012-10-04 Rolls-Royce Deutschland Ltd & Co Kg Stator of an axial compressor stage of a turbomachine
DE102011007767A1 (en) * 2011-04-20 2012-10-25 Rolls-Royce Deutschland Ltd & Co Kg flow machine
US8943792B2 (en) * 2011-06-29 2015-02-03 United Technologies Corporation Gas-driven propulsor with tip turbine fan
DE102011056826B4 (en) 2011-12-21 2014-06-26 Eads Deutschland Gmbh Soundproofing device and thus provided engine and method of providing
US9476385B2 (en) * 2012-11-12 2016-10-25 The Boeing Company Rotational annular airscrew with integrated acoustic arrester
US9957840B2 (en) 2013-02-26 2018-05-01 United Technologies Corporation Acoustic treatment to mitigate fan noise
EP2971659B1 (en) 2013-03-15 2021-09-22 Raytheon Technologies Corporation Acoustic liner with varied properties
US10415505B2 (en) * 2013-08-12 2019-09-17 United Technologies Corporation Non-axisymmetric fan flow path
US9850850B2 (en) * 2013-10-23 2017-12-26 Rohr, Inc. Acoustically treated thrust reverser track beam
DE102014006112A1 (en) * 2014-04-29 2015-10-29 Autogyro Ag aircraft
AU2016267963B2 (en) 2015-05-25 2020-08-13 Dotterel Technologies Limited A shroud for an aircraft
US9587563B2 (en) 2015-07-21 2017-03-07 The Boeing Company Sound attenuation apparatus and method
US9771868B2 (en) * 2015-07-21 2017-09-26 The Boeing Company Sound attenuation apparatus and method
US10823060B2 (en) * 2015-12-18 2020-11-03 Raytheon Technologies Corporation Gas turbine engine with short inlet, acoustic treatment and anti-icing features
US10161357B2 (en) 2016-06-17 2018-12-25 Rohr, Inc. Acoustically treated thrust reverser track beam
AU2018306554A1 (en) 2017-07-24 2020-02-20 Dotterel Technologies Limited Shroud
FR3078107B1 (en) 2018-02-19 2020-07-31 Safran Aircraft Engines TURBOMACHINE NACELLE WITH ACOUSTICALLY POROUS WALLS
AU2019271730A1 (en) 2018-05-16 2020-12-24 Dotterel Technologies Limited Systems and methods for audio capture
DE102018116062A1 (en) * 2018-07-03 2020-01-09 Rolls-Royce Deutschland Ltd & Co Kg Structure assembly for a compressor of a turbomachine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909235A (en) * 1955-11-03 1959-10-20 Gen Dynamics Corp Muffler
US3263771A (en) * 1964-05-21 1966-08-02 Seifert Kurt Sound absorbing pipe lining having packing with different densities
US3542152A (en) * 1968-04-08 1970-11-24 Gen Electric Sound suppression panel
FR1580553A (en) * 1968-07-26 1969-09-05
US3508838A (en) * 1968-09-16 1970-04-28 Gen Electric Sound suppression of compressors used in gas turbine engines
US3655008A (en) * 1971-01-28 1972-04-11 Rohr Corp Sound suppressing apparatus

Also Published As

Publication number Publication date
JPS50118114A (en) 1975-09-16
JPS6010168B2 (en) 1985-03-15
DE2504073A1 (en) 1975-08-21
BE825517A (en) 1975-05-29
GB1499724A (en) 1978-02-01
FR2261583A1 (en) 1975-09-12
DE2504073C2 (en) 1983-12-01
US3890060A (en) 1975-06-17
FR2261583B1 (en) 1981-02-13

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