JP6631977B2 - 騒音低減装置、航空機及び騒音低減方法 - Google Patents

騒音低減装置、航空機及び騒音低減方法 Download PDF

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Publication number
JP6631977B2
JP6631977B2 JP2018031578A JP2018031578A JP6631977B2 JP 6631977 B2 JP6631977 B2 JP 6631977B2 JP 2018031578 A JP2018031578 A JP 2018031578A JP 2018031578 A JP2018031578 A JP 2018031578A JP 6631977 B2 JP6631977 B2 JP 6631977B2
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Japan
Prior art keywords
perforated plate
noise reduction
fluid
flow
reduction device
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JP2018031578A
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English (en)
Japanese (ja)
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JP2019148266A5 (enExample
JP2019148266A (ja
Inventor
亨 平井
亨 平井
光宏 村山
光宏 村山
一臣 山本
一臣 山本
伊藤　靖
靖 伊藤
健太郎 田中
健太郎 田中
武久 高石
武久 高石
譲 横川
譲 横川
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Japan Aerospace Exploration Agency JAXA
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Japan Aerospace Exploration Agency JAXA
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Publication date
Application filed by Japan Aerospace Exploration Agency JAXA filed Critical Japan Aerospace Exploration Agency JAXA
Priority to JP2018031578A priority Critical patent/JP6631977B2/ja
Priority to PCT/JP2019/002065 priority patent/WO2019163379A1/ja
Priority to EP19756790.2A priority patent/EP3760882B1/en
Priority to US16/976,020 priority patent/US11577823B2/en
Publication of JP2019148266A publication Critical patent/JP2019148266A/ja
Publication of JP2019148266A5 publication Critical patent/JP2019148266A5/ja
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C7/00—Structures or fairings not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/001—Devices not provided for in the groups B64C25/02 - B64C25/68
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface 
    • B64C25/34—Alighting gear characterised by elements which contact the ground or similar surface  wheeled type, e.g. multi-wheeled bogies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/0005—Baffle plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/10—Influencing flow of fluids around bodies of solid material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/001—Devices not provided for in the groups B64C25/02 - B64C25/68
    • B64C2025/003—Means for reducing landing gear noise, or turbulent flow around it, e.g. landing gear doors used as deflectors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/08—Boundary layer controls by influencing fluid flow by means of surface cavities, i.e. net fluid flow is null
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C2230/00—Boundary layer controls
    • B64C2230/14—Boundary layer controls achieving noise reductions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/02—Undercarriages
    • B64C25/04—Arrangement or disposition on aircraft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/008—Reduction of noise or vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/8616—Control during or prevention of abnormal conditions the abnormal condition being noise or vibration

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Tires In General (AREA)
JP2018031578A 2018-02-26 2018-02-26 騒音低減装置、航空機及び騒音低減方法 Active JP6631977B2 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2018031578A JP6631977B2 (ja) 2018-02-26 2018-02-26 騒音低減装置、航空機及び騒音低減方法
PCT/JP2019/002065 WO2019163379A1 (ja) 2018-02-26 2019-01-23 騒音低減装置、航空機及び騒音低減方法
EP19756790.2A EP3760882B1 (en) 2018-02-26 2019-01-23 Noise reducing device, aircraft, and noise reduction method
US16/976,020 US11577823B2 (en) 2018-02-26 2019-01-23 Noise reduction apparatus, aircraft, and noise reduction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018031578A JP6631977B2 (ja) 2018-02-26 2018-02-26 騒音低減装置、航空機及び騒音低減方法

Publications (3)

Publication Number Publication Date
JP2019148266A JP2019148266A (ja) 2019-09-05
JP2019148266A5 JP2019148266A5 (enExample) 2019-10-17
JP6631977B2 true JP6631977B2 (ja) 2020-01-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2018031578A Active JP6631977B2 (ja) 2018-02-26 2018-02-26 騒音低減装置、航空機及び騒音低減方法

Country Status (4)

Country Link
US (1) US11577823B2 (enExample)
EP (1) EP3760882B1 (enExample)
JP (1) JP6631977B2 (enExample)
WO (1) WO2019163379A1 (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11485471B2 (en) * 2017-08-25 2022-11-01 United States Of America As Represented By The Administrator Of Nasa Application of leading edge serration and trailing edge foam for undercarriage wheel cavity noise reduction
EP3560826B1 (en) * 2018-04-25 2022-11-30 Safran Landing Systems UK Ltd Noise reduction fairing
DE102020128400B3 (de) * 2020-10-28 2022-01-27 Airbus Defence and Space GmbH Strömungskörper für ein Fahrzeug und Verfahren zum Herstellen eines Strömungskörpers
CN114462257B (zh) * 2022-04-11 2023-01-31 中国空气动力研究与发展中心计算空气动力研究所 一种航空飞机起落架舱流动振荡控制方法
GB2633083A (en) * 2023-09-01 2025-03-05 Safran Landing Systems Uk Ltd Aircraft landing gear assembly
GB2638447A (en) * 2024-02-23 2025-08-27 Safran Landing Systems Uk Ltd Aircraft Landing Gear Assembly

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003219506A (ja) * 2002-01-22 2003-07-31 Central Japan Railway Co パンタグラフの騒音低減方法とパンタグラフカバー装置
GB0225517D0 (en) 2002-11-01 2002-12-11 Airbus Uk Ltd Landing gear
EP1753656B1 (en) 2004-03-29 2013-05-08 Goodrich Corporation Landing gear noise attenuation
FR2913948B1 (fr) * 2007-03-23 2009-04-24 Airbus France Sas Train d'atterrissage d'avion pourvu d'au moins au moyen de reduction de bruit
JP5185871B2 (ja) * 2009-03-30 2013-04-17 一般社団法人日本航空宇宙工業会 飛行体の騒音低減方法、飛行体の脚部構造及び飛行体
SE535926C2 (sv) * 2011-05-05 2013-02-19 Scania Cv Ab Anordning för dämpning av ljud och motorfordon innefattande en sådan anordning
GB2494219B (en) * 2012-02-06 2013-10-16 Messier Dowty Ltd A fairing
US9487289B2 (en) * 2013-03-15 2016-11-08 Bae Systems Plc Cavity acoustic tones suppression

Also Published As

Publication number Publication date
EP3760882A4 (en) 2021-04-28
US11577823B2 (en) 2023-02-14
US20210039773A1 (en) 2021-02-11
EP3760882A1 (en) 2021-01-06
EP3760882B1 (en) 2025-08-27
WO2019163379A1 (ja) 2019-08-29
JP2019148266A (ja) 2019-09-05

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