Title:
リブレット構造及び物体
Document Type and Number:
Japanese Patent JP6714925
Kind Code:
B2
Abstract:
[Object] To provide a riblet structure that further reduces drag, which is a sum of turbulent friction drag and pressure drag, and an object including such a riblet structure. [Solving Means] An object 1 such as an aircraft, plant, and pipeline includes a wavelike riblet pattern 3 on a surface 2. The wavelike riblet pattern 3 includes a large number of wavelike riblets 30. Each of the large number of wavelike riblets 30 includes a wavelike ridge line 31, and a height h thereof changes cyclically with respect to a fluid flow direction D. With such a configuration, drag, which is a sum of turbulent friction drag and pressure drag, can be further reduced.
Inventors:
Nozomi Okabayashi
Koshioka Yasuhiro
Kei Nishizawa
Kurita Mitsuru
Hidetoshi Iijima
Koshioka Yasuhiro
Kei Nishizawa
Kurita Mitsuru
Hidetoshi Iijima
Application Number:
JP2016041018A
Publication Date:
July 01, 2020
Filing Date:
March 03, 2016
Export Citation:
Assignee:
Japan Aerospace Exploration Agency
International Classes:
F15D1/12; B64C21/10
Domestic Patent References:
| JP2005522644A |
Foreign References:
| US20120025025 | ||||
| FR2899945A1 | ||||
| WO2009000703A1 |
Attorney, Agent or Firm:
Junichi Omori
Mitsuru Takahashi
Ori Akira
Masayoshi Sekine
Teppei Nakamura
Ayako Kaneko
Nozomi Yoshida
Shintaro Kanayama
Chiba Ayako
Shiraka Tomohisa
Mitsuru Takahashi
Ori Akira
Masayoshi Sekine
Teppei Nakamura
Ayako Kaneko
Nozomi Yoshida
Shintaro Kanayama
Chiba Ayako
Shiraka Tomohisa