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Student Number 87322072
Author Shin-Jing Gou(高昇敬)
Author's Email Address No Public.
Statistics This thesis had been viewed 1907 times. Download 1397 times.
Department Civil Engineering
Year 1999
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title 矩形建築物高寬比對其周遭風場影響之研究
Date of Defense 2000-07-18
Page Count 144
Keyword
  • 分離剪力層
  • 紊流動能
  • 紊流動能消散率
  • 裂膜探針
  • 邊界層流
  • 雷諾剪應力
  • 風場
  • 風洞實驗
  • Abstract 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.
    Table of Content 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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    張仁德 (1995) “風經結構物之數值模擬” , 國立臺灣大學土木工程研究所博士論文

    朱佳仁 (1997) “國立中央大學大型環境風洞之簡介” , 國立中央大學土木工程學系
    黃隆明 (1997) “不透風式構造物之防風功效研究” , 國立中興大學水土保持學研究所博士論文

    朱佳仁 (1999) “建築物之風場環境評估規範研議” , 內政部建築研究所研究報告
    許皓昌 (1999) “透風式防風牆風場特性之實驗研究” , 國立中央大學土木工程研究所碩士論文

    陳謹偉 (1999) “矩形柱體來流端馬蹄型渦流流場之實驗探討” , 國立中興大學土木工程研究所碩士論文
    Advisor
  • Chia-Ren Chu(朱佳仁)
  • Files
  • 87322072.pdf
  • approve immediately
    Date of Submission 2000-07-18

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