Title:
騒音低減装置、航空機及び騒音低減方法
Document Type and Number:
Japanese Patent JP6631977
Kind Code:
B2
Abstract:
[Object] To provide a noise reduction apparatus, an aircraft, and a noise reduction method capable of increasing the amount of noise reduction.[Solving Means] The noise reduction apparatus 1 includes a porous plate 2 disposed to face a fluid flow, the porous plate 2 including a bend region 5 bent toward an upstream side of the fluid flow. The bend region 5 is provided at the end portion 6 of the porous plate 2, and has a concave R-shape on an upstream side of the fluid flow. Although the direction of the fluid flow is typically deflected toward the outside from the center of the porous plate 2 due to the porous plate 2, the deflected fluid easily passes through the porous plate 2 since the porous plate has the bend region 5. Thus, the shear layer of the fluid flow is weakened, the noise induced by the vortex is reduced, and it is possible to increase the reduction amount of noise.
Inventors:
Toru Hirai
Murahiro Murayama
Yamamoto Kazuomi
Yasushi Ito
Kentaro Tanaka
Takehisa Takaishi
Yokogawa
Murahiro Murayama
Yamamoto Kazuomi
Yasushi Ito
Kentaro Tanaka
Takehisa Takaishi
Yokogawa
Application Number:
JP2018031578A
Publication Date:
January 15, 2020
Filing Date:
February 26, 2018
Export Citation:
Assignee:
Japan Aerospace Exploration Agency
International Classes:
F15D1/00; B64C7/00; B64C25/04
Domestic Patent References:
| JP2010522110A | ||||
| JP2014514502A | ||||
| JP2003219506A |
Foreign References:
| WO2004039671A1 |
Attorney, Agent or Firm:
Junichi Omori
Mitsuru Takahashi
Teppei Nakamura
Ori Akira
Masayoshi Sekine
Ayako Kaneko
Shintaro Kanayama
Chiba Ayako
Shiraka Tomohisa
Mitsuru Takahashi
Teppei Nakamura
Ori Akira
Masayoshi Sekine
Ayako Kaneko
Shintaro Kanayama
Chiba Ayako
Shiraka Tomohisa