Numerical simulations of flow past a 2-D airfoil at a low Reynolds number
| Autor: | Ikeda, Tomoaki, Kurotaki, Takuji, Sumi, Takahiro, Takagi, Shohei |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
境界層遷移
低レイノルズ数 音圧 Karman vortex street wake instability low Reynolds number エオルス音 計算機シミュレーション 粘性流 翼型 速度分布 層流域後流 viscous flow velocity distribution Physics::Fluid Dynamics 後流不安定性 2次元物体 カルマン渦列 sound pressure airfoil two dimensional body laminar wake computerized simulation boundary layer transition aeolian tone |
| Zdroj: | 宇宙航空研究開発機構特別資料: 境界層遷移の解明と制御研究会講演論文集 第40回 = JAXA Special Publication: Proceedings of the 40th JAXA Workshop on Investigation and Control of Boundary-Layer Transition. :41-44 |
| ISSN: | 1349-113X |
| Popis: | Karman-vortex shedding induced by wake instability behind a 2-D airfoil is of interest at relatively low Reynolds numbers, to understand how a vortex street develops in the wake region, and also how an aeolian tone is generated therefrom; this is supposed to show a different flow mechanism from a high-Reynolds number flow that exhibits more complicated viscous-flow phenomena. In this study, we performed numerical simulations of a 2-D laminar flow past an NACA0012 airfoil. The computation was run on the simulation code being developed to predict an aero-acoustic problem by using a highly accurate numerical method. For the verification of our code, the results are compared with the experimental data obtained in a similar flow configuration and also with an available numerical study. The detailed flow visualization is presented to understand the mechanism of the wake instability that results in vortex shedding. 資料番号: AA0063908013 レポート番号: JAXA-SP-07-026E |
| Databáze: | OpenAIRE |
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