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題 名 | Characteristics of Vortex Structure Induced by a Solitary Wave Propagating over a Rectangular Cavity=孤立波通過矩形穴槽時之渦流特性研究 |
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作 者 | 林呈; 何宗浚; 張錦鑲; 張志華; | 書刊名 | 海洋工程學刊 |
卷 期 | 7:2 2007.12[民96.12] |
頁 次 | 頁1-24 |
分類號 | 443.1 |
關鍵詞 | 波浪與穴槽交互作用; 孤立波; 展弦比; 渦流; 流場可視化; Wave-cavity interaction; Solitary waves; Aspect ratio; Vortices; Flow visualization; |
語 文 | 英文(English) |
中文摘要 | 本研究係以先進之質點影像測速儀(PIV)以及流場可視化法,對於孤立波通過矩形穴槽時,穴槽周邊流場的渦流脫離運動進行觀察與量測。矩形穴槽模型之展弦比(A(下標 r))介於0.33至無限大,所採用之波高水深比為0.2。本文特別針對展弦比為0.5、1.0 與無限大時,流場中的渦流運動特性進行展示與描述。並在展弦比介於0.33至無限大的實驗條件下,對於流場中的定量特性如主渦渦心運動軌跡、渦心渦度、主渦環流量強度等,進行詳細的分析與討論。 |
英文摘要 | The characteristics of vortex structure induced by a solitary wave propagating over a rectangular cavity are studied experimentally, using particle image velocimetry (PIV) and two flow visualization techniques. The aspect ratio (i.e., ratio of the length to the depth of a cavity, A(subscript r)) of rectangular cavity ranges from 0.33 to infinity in the present study. The ratio of wave height to water depth in the experiment is kept at 0.2. Vortex shedding process is identified particularly for A(subscript r)=0.5, 1.0 and infinity. Detailed vortical structures for A(subscript r)=0.33~∞ were observed using particle trajectory photography or laser induced fluorescence technique. Quantitative characteristics of the primary vortex generated in the cavity, including the trajectories and vorticity of the vortex core and the circulation of the primary vortex, are elucidated in detail. |
本系統中英文摘要資訊取自各篇刊載內容。