| Item type |
テクニカルレポート / Technical Report(1) |
| 公開日 |
2015-03-26 |
| タイトル |
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タイトル |
大迎角の翼をすぎる遷音速流 |
| 言語 |
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言語 |
jpn |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_18gh |
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資源タイプ |
technical report |
| その他のタイトル（英） |
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その他のタイトル |
Computational Study of Flow around an Airfoil at High Angles of Attack by a Block Pentadiagonal Matrix Method |
| 著者 |
信太, 良文
桑原, 邦郎
Shida, Yoshifumi
Kuwahara, Kunio
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| 著者所属 |
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東京大学工学部 |
| 著者所属 |
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宇宙科学研究所 |
| 出版者 |
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出版者 |
航空宇宙技術研究所 |
| 出版者（英） |
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出版者 |
National Aerospace Laboratory(NAL) |
| 書誌情報 |
航空宇宙技術研究所特別資料
en : Special Publication of National Aerospace Laboratory SP-5
巻 5,
p. 175-184,
発行日 1985-11
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| 抄録（英） |
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内容記述タイプ |
Other |
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内容記述 |
In this paper, two unsteady flows around an airfoil are studied by numerically solving the two-dimensional compressible Navier-Stokes equations. One is the flow around an NACA0012 airfoil at Mach 0.4 at an angle of attack of 15 degrees. The Reynolds number is 1000000. The other is the dynamic stall problem around an NACA0012 airfoil. The Mach number is 0.3. The Reynolds number is 4000000. The block pentadiagonal matrix scheme, a new method which is based on the approximate factorization scheme, is adopted. In the former case, a strong suction peak is observed near the leading edge in the computational results obtained by using a fine mesh. It apeared to be maintained by turbulence-like small vortices. In the case of the dynamic stall, two noteworthy features are observed in the computation using the fine mesh. The first is that when vortex separation occurs on the upstroke, many small vortices are separated from all parts of the surface, rather them just one large vortex from the leading edge as one might expect. The second is that the flow re-attaches when the angle of attack is about 8 degrees on the down-stroke. The lift stall is clealy captured in this study. |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0289-260X |
| 書誌レコードID |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AN10097345 |
| 資料番号 |
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内容記述タイプ |
Other |
|
内容記述 |
資料番号: NALSP0005023 |
| レポート番号 |
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内容記述タイプ |
Other |
|
内容記述 |
レポート番号: NAL SP-5 |
nalsp0005023.pdf (668.9 kB)
