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規格・テクニカルリポート類

はく離直前に現れる不安定波動

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はく離直前に現れる不安定波動

Material type
規格・テクニカルリポート類
Author
望月, 修ほか
Publisher
航空宇宙技術研究所
Publication date
2000-12
Material Format
Digital
Capacity, size, etc.
-
NDC
-
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Notes on use

Note (General):

27-28 Sept. 1999 (25th). 27-28 Mar. 2000 (26th)The surface pressure change during a pitching motion of an airfoil was measured, and was analyzed to ob...

Detailed bibliographic record

Summary, etc.:

翼のピッチング運動時の翼表面圧力変化を計測し、はく離の兆候を得るため解析した。他の信号から兆候信号を区別するには、はく離開始時間を正確に知ることが必要であるため、予測可能なはく離を作り出すのにピッチング翼を採用した。時間に対し指数関数的に増幅された正弦波ははく離の直前に出現することが分かった。この変...

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Digital

Material Type
規格・テクニカルリポート類
Author/Editor
望月, 修
Mochizuki, Osamu
Publication, Distribution, etc.
Publication Date
2000-12
Publication Date (W3CDTF)
2000-12
Alternative Title
Instability waves appearing before separation
Periodical title
航空宇宙技術研究所特別資料
No. or year of volume/issue
47
Volume
47
Pages
23-24
ISSN (Periodical Title)
ISSN : 0289-260X
Text Language Code
jpn
Target Audience
一般
Note (General)
27-28 Sept. 1999 (25th). 27-28 Mar. 2000 (26th)
The surface pressure change during a pitching motion of an airfoil was measured, and was analyzed to obtain a precursor of separation. A pitching airfoil was adopted to produce a predictable separation, because it is necessary to know a precise time to start separation to distinguish the precursor from other signals. The sinusoidal wave amplified exponentially in time was found to appear just before separation. This fluctuation is regarded as an instability wave of boundary layer based on the velocity profile with an inflection point.
資料番号: AA0028636007
レポート番号: NAL SP-47
Access Restrictions
インターネット公開
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)
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