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姓名	高昇敬(Shin-Jing Gou)  查詢紙本館藏	畢業系所	土木工程學系
論文名稱	矩形建築物高寬比對其周遭風場影響之研究
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摘要(英)	The flow field around surface-mounted obstacles were experimentally investigated in this study. The experiments were conducted in large-scale wind tunnel. The turbulent velocity, kinetic energy, dissipation rate and vorticity distribution were measured by a split-film thermal anemometer and an automatic transversing system. The influence of the aspect ratio of obstacle was systematically studied in this research. The experimental results reveal that the separated shear layer on the top of the obstacle grows stronger as the width and height ratio increases. Also, the wake flow of the obstacle does not have periodic vortex shedding like that of cylindrical wake.
關鍵字(中)	★ 風洞實驗 ★ 邊界層流 ★ 裂膜探針 ★ 風場 ★ 分離剪力層 ★ 雷諾剪應力 ★ 紊流動能 ★ 紊流動能消散率	關鍵字(英)
論文目次	目錄 頁次 中文摘要I 英文摘要II 目錄III 圖目錄VI 表目錄IX 符號表X 第一章 緒 論1 1.1 前言1 1.2 研究動機1 1.3 研究內容及大綱3 第二章 文獻回顧與理論基礎5 2.1 風經建築構造物之相關文獻5 2.2 大氣邊界層12 2.3 紊流強度與雷諾剪應力13 2.4 紊流動能與紊流動能消散率15 第三章 實驗設備與方法20 3.1 大型環境風洞20 3.2 裂膜探針及校正方法22 3.3 裂膜探針校正步驟及使用方法26 3.4 大氣邊界層模擬與建築物模型29 3.5 自動平移量測系統與數據處理31 第四章 結果與討論52 4.1 迫近流場52 4.2 建築物周遭流場之定性觀測53 4.3 不同寬高比( W/H )54 4.3.1 平均速度54 4.3.2 紊流速度57 4.3.3 渦度場59 4.3.4 地表剪應力分佈60 4.3.5 頻譜分析61 4.3.6 紊流動能消散率62 4.4 不同高度62 4.4.1 平均速度62 4.4.2 紊流速度64 4.4.3 渦度場65 4.4.4 地表剪應力分佈66 4.4.5 頻譜分析66 4.4.6 紊流動能消散率66 第五章 結論與建議117 5.1 結論117 5.2 建議119 參考文獻120
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指導教授	朱佳仁(Chia-Ren Chu)	審核日期	2000-7-18
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