壁乱流構造に対する境界層吸込みの影響:再層流化と再遷移過程

Material type: 文書・図像類

Author: 浅井, 雅人ほか

Publisher: 航空宇宙技術研究所

Publication date: 2000-12

Material Format: Digital

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Note (General)：: 27-28 Sept. 1999 (25th). 27-28 Mar. 2000 (26th)吸込み領域下流における再遷移過程時の壁近傍コヒーレント構造の発達を調べるため、短尺多孔質板を通して乱流境界層に境界層吸込みを適用させた。吸込み作用のため再層流化時に壁近傍では低周波変動が著しく抑制され、その...

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Material Type: 文書・図像類
Title: 壁乱流構造に対する境界層吸込みの影響:再層流化と再遷移過程
Author/Editor: 浅井, 雅人
星, 武志
田部井, 康一
Asai, Masahito
Hoshi, Takeshi
Tabei, Koichi
Author Heading: 浅井, 雅人
星, 武志
田部井, 康一
Asai, Masahito
Hoshi, Takeshi
Tabei, Koichi
Publication, Distribution, etc.: 航空宇宙技術研究所
Publication Date: 2000-12
Publication Date (W3CDTF): 2000-12
Alternative Title: Influence of boundary-layer suction on wall turbulence structures: Laminarization and re-transition processes
Periodical title: 航空宇宙技術研究所特別資料 = Special Publication of National Aerospace Laboratory
No. or year of volume/issue: 47
Volume: 47
Pages: 43-46
ISSN (Periodical Title): ISSN : 0289-260X
Text Language Code: jpn
Subject Heading: 乱流境界層
境界層吸込み
壁乱流構造
再層流化
再遷移過程
コヒーレント構造
低周波変動
低速ストリーク
バックグラウンド乱流
吸込み領域
turbulent boundary layer
boundary layer suction
wall turbulence structure
relaminarization
retransition process
coherent structure
low frequency fluctuation
low speed streak
background turbulence
suction area
Target Audience: 一般
Note (General): 27-28 Sept. 1999 (25th). 27-28 Mar. 2000 (26th)
吸込み領域下流における再遷移過程時の壁近傍コヒーレント構造の発達を調べるため、短尺多孔質板を通して乱流境界層に境界層吸込みを適用させた。吸込み作用のため再層流化時に壁近傍では低周波変動が著しく抑制され、その変動が吸込み領域のすぐ下流で成長を開始し壁乱流になる。再遷移過程時の壁近傍低周波変動の成長が、壁近傍低速ストリークの出現と蛇行に関連すること、ストリークが高強度バックグラウンド乱流により引き起こされるバイパス境界層遷移の原因であることが分かった。
Boundary layer suction is applied to a turbulent boundary layer through a short porous strip to examine the development of near-wall coherent structures in the re-transition process downstream of the suction area. Low-frequency fluctuations are markedly suppressed near the wall during re-laminarization due to the suction, and they start to grow immediately downstream of the suction area, leading to wall turbulence. The growth of near-wall low-frequency fluctuations in the re-transition process is found to be associated with the appearance and meandering of near-wall low-speed streaks, which are responsible for the by-pass boundary-layer transition caused by high-intensity background turbulence.
資料番号: AA0028636014
レポート番号: NAL SP-47
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