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題名 | 縱列兩圓柱之間距對密度層變流場之影響 |
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作 者 | 許正元; | 書刊名 | 逢甲學報 |
卷期 | 26 1993.11[民82.11] |
頁次 | 頁203-215 |
分類號 | 440.137 |
關鍵詞 | 密度層變流; 圓柱之間距; 阻滯區; 分離區; |
語文 | 中文(Chinese) |
中文摘要 | 密度層變流體通過前後兩圓柱之流場;控制方程式及 邊界條件皆先轉換至物形調適之座標系統後,再以有限差 分法建立數值模式,用以研究兩圓柱之間距所產生之非定 常影響。本文曾將本模式與前人之物理實驗結果以及前人 之有限元素法數值模式驗證,結果相當良好。由結果得知 ,密度層變流場與密度均勻流場有極大差異,尤其是內重 力波方面。此外,阻滯區、分離區、阻力、昇力等,皆受 到間距之影響。 |
英文摘要 | The governing cquations, the physical domain and the boundary conditions of a stratified flow past two circular cylinders in tandem arrangement are transformed to a body-fitted corrdinate system. Then a finite difference model are constructed to study the transient effects of the gap between the two cylinders. This model are verified by a previous physical experiment and a finite element mumerical model. It is shown that the flow field of stratified fluid is very different from that of homogeneous density fluid, especially those due to internal waves. The blocking zone, the separation zone, the drag and the life are all affected by the gap distance. |
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