自由落下球体の境界層制御

Material type: 文書・図像類

Author: 幾島, 康夫ほか

Publisher: 航空宇宙技術研究所

Publication date: 1991-09

Material Format: Digital

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Note (General)：: The effect of surface roughness on a sphere at free fall has been investigated. The test sphere is of 100 mm in diameter, and is equipped with built-i...

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Material Type: 文書・図像類
Title: 自由落下球体の境界層制御
Author/Editor: 幾島, 康夫
大路, 通雄
Ikushima, Yasuo
Ooji, Michio
Author Heading: 幾島, 康夫
大路, 通雄
Ikushima, Yasuo
Ooji, Michio
Publication, Distribution, etc.: 航空宇宙技術研究所
Publication Date: 1991-09
Publication Date (W3CDTF): 1991-09
Alternative Title: Boundary-Layer Control on a Freely Falling Sphere
Periodical title: 航空宇宙技術研究所特別資料 = Special Publication of National Aerospace Laboratory SP-15
No. or year of volume/issue: 15
Volume: 15
Pages: 43-48
ISSN (Periodical Title): ISSN : 0289-260X
Text Language Code: jpn
Subject Heading: transition; built-in processors; freely falling sphere; unsteady flow; surface roughness; trip ring
Target Audience: 一般
Note (General): The effect of surface roughness on a sphere at free fall has been investigated. The test sphere is of 100 mm in diameter, and is equipped with built-in processors such as a pressure sensor, a tension sensor, an amplifier, a memory, a power supply and a CPU. The surface roughness was obtained by a ring of phi 1 mm wire attached to the surface at angles phi r = 25 degrees and 55 degrees , respectively, measured from the stagnation point. In the case of phi r = 25 degrees , the pressure distributions were same as a smooth sphere at Re less than equal to 105. In the case of phi r = 55 degrees , on the other hand, the effects of trip ring were striking, indicating the laminar-turbulent transition of the boundary layer at Re = 5 by 104.
資料番号: NALSP0015010
レポート番号: NAL SP-15
Access Restrictions: 限定公開
Periodical Title (NCID): AN10097345
https://ci.nii.ac.jp/ncid/AN10097345
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 宇宙航空研究開発機構 : 宇宙航空研究開発機構リポジトリ