乱流渦と乱流場との相互作用について
| Autor: | Takahashi, Naoya, Takahashi, Tadayasu, Miyazaki, Takeshi |
|---|---|
| Jazyk: | japonština |
| Rok vydání: | 2006 |
| Předmět: | |
| 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35回・第36回 = JAXA Special Publication: Proceedings of the 35th and 36th JAXA Workshops on Investigation and Control of Boundary-Layer Transition. :39-42 |
| ISSN: | 1349-113X |
| Popis: | The interaction between a, columnar vortex and external turbulence is investigated numerically. As the columnar vortex, the Lamb-Oseen vortex is used. The columnar vortex is immersed in an initially isotropic homogeneous turbulence field, which itself is product by a direct numerical simulation of decaying turbulence. Statistical quantities, such as two-point-energy-spectra and two-point-enstrophy-spectra, are evaluated and compared with the theoretical prediction theory (RDT). The axial velocity correlation dominates near the vortex surface, whereas the radial velocity correlation becomes lager where the worms are wrapped. Where the columnar vortex is strong compared with the external turbulence, external velocity disturbances are blocked by the vortex and they cannot penetrate into the vortex core directly, whereas various types of vortex waves are excited. 資料番号: AA0049208013 レポート番号: JAXA-SP-05-012 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|