NO931802L - Dempeledd - Google Patents

Dempeledd

Info

Publication number
NO931802L
NO931802L NO93931802A NO931802A NO931802L NO 931802 L NO931802 L NO 931802L NO 93931802 A NO93931802 A NO 93931802A NO 931802 A NO931802 A NO 931802A NO 931802 L NO931802 L NO 931802L
Authority
NO
Norway
Prior art keywords
mute
link
masses
facing surfaces
outlet area
Prior art date
Application number
NO93931802A
Other languages
English (en)
Other versions
NO931802D0 (no
Inventor
Alan Trevor Fry
Original Assignee
Sound Attenuators 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 Sound Attenuators Ltd filed Critical Sound Attenuators Ltd
Publication of NO931802L publication Critical patent/NO931802L/no
Publication of NO931802D0 publication Critical patent/NO931802D0/no

Links

Classifications

    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/085—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling throttling exhaust gas flow using a central core in a flow passage
    • 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
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • 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
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • 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
    • F16L55/033—Noise absorbers
    • F16L55/0331—Noise absorbers by inserting an elongated element in the pipe
    • 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
    • F16L55/033—Noise absorbers
    • F16L55/0336—Noise absorbers by means of sound-absorbing materials
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Exhaust Silencers (AREA)
  • Duct Arrangements (AREA)

Abstract

Akustisk dempeledd med i det minste to masser (102, 103) av lyddempende materialea lokalisert i en kanal (101) med en gasspassasje mellom de mot hverandre vendte overflater til i det minste to massene, gjennom hvilke gass skal strømme fra et innløpsområde av passasjen til et utløpsområde (B) derav, i det minste en av de mot hverandre vendte flater fremviser et trinn (102b) som frembringer en utvidelse av gasspassasjen l utløpsområdet.
NO1993931802A 1990-11-21 1993-05-18 Dempeledd NO931802D0 (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/GB1990/001799 WO1992009988A1 (en) 1990-11-21 1990-11-21 Improvements in attenuators

Publications (2)

Publication Number Publication Date
NO931802L true NO931802L (no) 1993-05-18
NO931802D0 NO931802D0 (no) 1993-05-18

Family

ID=10669948

Family Applications (1)

Application Number Title Priority Date Filing Date
NO1993931802A NO931802D0 (no) 1990-11-21 1993-05-18 Dempeledd

Country Status (3)

Country Link
EP (1) EP0558472B1 (no)
NO (1) NO931802D0 (no)
WO (1) WO1992009988A1 (no)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2267359B (en) * 1992-05-26 1995-07-26 Sound Attenuators Ltd Improvements in attenuating bends
SE511627C2 (sv) * 1997-11-03 1999-11-01 Stifab Farex Ab Baffel för ljuddämpere för rektangulära ventilationskanaler
SE511628C2 (sv) * 1997-11-10 1999-11-01 Stifab Farex Ab Ljuddämpare med bafflar för rektangulära ventilationskanaler
JP5947606B2 (ja) * 2012-04-17 2016-07-06 大成建設株式会社 消音器
EP2871636B1 (en) 2013-11-08 2021-01-06 Volvo Car Corporation Sound reduction system
CN103912755A (zh) * 2014-03-27 2014-07-09 中国船舶重工集团公司第七二五研究所 一种管路用周期结构阻尼以及处理方法
JP6578225B2 (ja) * 2016-02-23 2019-09-18 三菱日立パワーシステムズ株式会社 吸音スプリッタ、サイレンサ、ガスタービン用煙突、および、ガスタービン
CN109488833B (zh) * 2018-12-12 2024-04-23 华电重工股份有限公司 一种片式消声器
CN111022814A (zh) * 2019-12-17 2020-04-17 华电重工股份有限公司 一种矩阵式消声器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109750A (en) * 1977-05-24 1978-08-29 Lockheed Aircraft Corporation Zeno duct sound attenuating means
DE3132169C2 (de) * 1981-08-14 1984-11-29 První brněnská strojírna, koncernový podnik, Brno Zylinderförmiger Verbrennungsschalldämpfer des Absorptionstyps
SE450656B (sv) * 1982-05-14 1987-07-13 Bahco Ventilation Ab Ljuddempare for ventilationskanaler eller ventilationsapparater

Also Published As

Publication number Publication date
NO931802D0 (no) 1993-05-18
EP0558472B1 (en) 1998-04-08
EP0558472A1 (en) 1993-09-08
WO1992009988A1 (en) 1992-06-11

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