小さいレイノルズ数での渦列の形成
| Autor: | Sato, Hiroshi, Saito, Hironosuke, Nakamura, Hiroshi |
|---|---|
| Jazyk: | japonština |
| Rok vydání: | 2002 |
| Předmět: |
水素泡箱
velocity fluctuation small Reynolds number 熱線速度計 渦流れ hydrogen bubble chamber 渦列 デジタルカメラ hot-wire velocimeter research and development Physics::Fluid Dynamics forced vibration 強制振動 Strouhal数 circular cylinder vortex shedding digital camera 円柱 hydraulic test tunnel 小Reynolds数 水テストトンネル vortex street 速度変動 研究開発 Strouhal number |
| Zdroj: | 航空宇宙技術研究所特別資料: 境界層遷移の解明と制御研究会講演論文集 第29回・第30回 = Special Publication of National Aerospace Laboratory: Proceedings of the 29th and 30th NAL Workshops on Investigation and Control of Boundary-Layer Transition. 56:23-26 |
| ISSN: | 1347-457X |
| Popis: | Experiments were carried out in a small water tunnel. The formation of vortex street behind cylinders was investigated in Reynolds number range from 20 to 100 by the simultaneous use of hydrogen bubble technique and hot-wire velocimeter. The boundary Reynolds number which is the smallest Reynolds number with vortex shedding was determined experimentally. The value is about 40. The Strouhal number, which is the nondimensional frequency of vortex shedding is around 0.13 at small Reynolds numbers. Because they are sensitive to a weak fluctuation in the flow, the precise values can not be determined. 資料番号: AA0045947007 レポート番号: NAL SP-56 |
| Databáze: | OpenAIRE |
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