GB1462393A - Suppressing sound from a fluid flowing in a duct - Google Patents

Suppressing sound from a fluid flowing in a duct

Info

Publication number
GB1462393A
GB1462393A GB265874A GB265874A GB1462393A GB 1462393 A GB1462393 A GB 1462393A GB 265874 A GB265874 A GB 265874A GB 265874 A GB265874 A GB 265874A GB 1462393 A GB1462393 A GB 1462393A
Authority
GB
United Kingdom
Prior art keywords
duct
perforations
silencing
passages
walls
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.)
Expired
Application number
GB265874A
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.)
Airbus Group SAS
Original Assignee
Airbus Group SAS
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 Airbus Group SAS filed Critical Airbus Group SAS
Publication of GB1462393A publication Critical patent/GB1462393A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/027—Throttle passages
    • F16L55/02763—Throttle passages using an element with multiple tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise
    • F05B2260/962—Preventing, counteracting or reducing vibration or noise by means creating "anti-noise"

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Exhaust Silencers (AREA)

Abstract

1462393 Silencing gaseous flows; gas turbine ducted fan engines - silencing SOC NATIONALE INDUSTRIELLE AEROSPATIALE 21 Jan 1974 [22 Jan 1973] 02658/74 Headings F1B; F1G and F1J A sound suppressing structure 100 for mounting in a duct to suppress sound from fluid flowing through the duct comprises perforated partition walls for sub-dividing into similar multiple passages 25 the whole cross-sectional area of the duct fluid passage, perforations 30 extending right through the walls, the cross-sectional area of the passages 25, the wall thickness and the size of the perforations 30 being such that there is resonance between each stream and the stream in the adjacent passages to silence the streams by destructive interference. The walls may be formed by welding folded sheets such as 26 and 27 to flat sheets such as 28 along weld lines 29. The flow channels may be triangular, rectangular, e.g. square, hexagonal or circular. Silencing of gas flowing through the channels is by resonance between adjacent channels via the perforations 30. In Fig. 12 a gas turbine ducted fan by-pass engine 200 has structures 33, 35, 37 with perforated partitions to silence the various gas flows.
GB265874A 1973-01-22 1974-01-21 Suppressing sound from a fluid flowing in a duct Expired GB1462393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7302109A FR2214855B1 (en) 1973-01-22 1973-01-22

Publications (1)

Publication Number Publication Date
GB1462393A true GB1462393A (en) 1977-01-26

Family

ID=9113627

Family Applications (1)

Application Number Title Priority Date Filing Date
GB265874A Expired GB1462393A (en) 1973-01-22 1974-01-21 Suppressing sound from a fluid flowing in a duct

Country Status (3)

Country Link
DE (1) DE2402902A1 (en)
FR (1) FR2214855B1 (en)
GB (1) GB1462393A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5575538A (en) * 1978-12-01 1980-06-06 Gen Electric Method of and apparatus for checking low frequency noise generated inside gas turbine
GB2259115A (en) * 1991-08-28 1993-03-03 Gen Electric Aircraft engine nacelle profile
CN101278157B (en) * 2005-09-29 2010-04-21 空中客车德国有限公司 Low-noise volume flow rate throttling of fluid-carrying pipes
US9039499B2 (en) 2008-10-22 2015-05-26 Airbus Operations Gmbh Air guiding element having a flow control element
US9624791B2 (en) 2014-09-11 2017-04-18 Honeywell International Inc. Noise suppression apparatus and methods of manufacturing the same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0105990A1 (en) * 1982-10-15 1984-04-25 International Combustion Australia Limited Vibration damping system for boilers
US5243683A (en) * 1992-07-09 1993-09-07 Yang Chiung Hsiang Laminar streamflow-guided hair dryer with finned PTC heating means
DE19737507A1 (en) * 1997-08-28 1999-03-11 Dampers Engineering Gmbh Twist influencing device of exhaust gas flow in turbine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2708006A (en) * 1953-11-05 1955-05-10 Backman Hans Fredrik Muffler assembly for internal combustion engines

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5575538A (en) * 1978-12-01 1980-06-06 Gen Electric Method of and apparatus for checking low frequency noise generated inside gas turbine
JPH0319366B2 (en) * 1978-12-01 1991-03-14 Gen Electric
GB2259115A (en) * 1991-08-28 1993-03-03 Gen Electric Aircraft engine nacelle profile
CN101278157B (en) * 2005-09-29 2010-04-21 空中客车德国有限公司 Low-noise volume flow rate throttling of fluid-carrying pipes
US9039499B2 (en) 2008-10-22 2015-05-26 Airbus Operations Gmbh Air guiding element having a flow control element
US9624791B2 (en) 2014-09-11 2017-04-18 Honeywell International Inc. Noise suppression apparatus and methods of manufacturing the same

Also Published As

Publication number Publication date
FR2214855B1 (en) 1976-04-30
FR2214855A1 (en) 1974-08-19
DE2402902A1 (en) 1974-08-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee