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研究生： 古政芳
Zhen-Fan Jo
論文名稱： 流動式顆粒床過濾器阻礙物配置之設計
指導教授： 蕭述三
Shu-San Hsiau
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 機械工程學系
Department of Mechanical Engineering
畢業學年度： 88
語文別： 中文
論文頁數： 121
中文關鍵詞： 流動式過濾顆粒床 、阻礙物
外文關鍵詞： Granular bed filtration, insert
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    • 本篇論文以實際濾材石英砂為實驗對象，藉由一套過濾顆粒床模型，並搭配不同葉片間距200 mm及250 mm，來探討葉片間距對石英砂流動的影響，實驗上以攝影記錄流動的全部情形，並經由計算顆粒體流動的速度來增加對流場的了解。而對於葉片組成之流場會產生真實靜止區，本論文針對不同葉片間距設計不同半角如
    20°與40°阻礙物，並在流場中置入阻礙物來作為流場的改善，消除真實靜止區。實驗結果得知阻礙物的加入有效消除真實靜止區，不過仍會在葉片轉折處有些許的真實靜止區形成，因此實驗上另外再改變阻礙物的位置，觀察不同的阻礙物位置對流動的影響，以其達到真實靜止區之最小化，進而得到一最佳之過濾設計。

    摘要…………………………………………………………………....i 附表目錄……………………………………………………………...iv 附圖目錄....……………………......………………………………v 符號說明....…………………………….…...…………………....x 第一章 簡介……………………………...…………………………….1 1.1 研究背景……………………..…………………………………1 1.2 研究目的…………………………………..……………………5 第二章 實驗方法…………………………….……………..………….8 2.1 實驗裝置………………………………………………..………8 2.1.1 實驗模擬系統……………………………………………..8 2.1.2 觀測與量測設備………………………………………….11 2.2 實驗步驟……………………………………………………...12 2.3 速度向量之計算…………………….….…………………...14 2.4 速度分布…………………………..….………….………...15 第三章 對稱型無阻礙物的實驗結果與討論…………….………….17 3.1 流動形態的分類………………………….………….……...17 3.2 流場分析…………………………………….…….………...18 3.2.1 流場影像圖……………………………….………………18 3.2.2 速度向量圖………………………………………….……19 3.2.3 垂直速度分布圖…………………………………….……20 3.2.4 水平速度分布圖…………………………………….……21 第四章 對稱型有阻礙物的實驗結果與討論………………………..24 4.1 流動形態的分類……………………….…………………...24 4.2 流場分析………………………………………….………...25 4.2.1 流場影像圖………….………………………….………25 4.2.2 殘留面積百分比…………………………………….….31 4.2.3 速度向量圖………………………………………………34 4.2.4 垂直速度分布圖…………………………………………35 4.2.5 水平速度分布圖…………………………………………37 第五章 結論………………………………………….…………..…40 參考文獻………………………………………………....………..42 附錄…………………………………………………………………..98

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