顆粒於振動床內熱傳行為之研究

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姓名

邱紹靂(Shao-Li Chiu) 查詢紙本館藏

畢業系所

機械工程學系

論文名稱

顆粒於振動床內熱傳行為之研究

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摘要(中)

本論文主要以實驗的方式探討顆粒體受到垂直振動時的熱傳行為。其分析對象包括顆粒床體的溫度分佈、顆粒的熱擴散係數、及顆粒體自我擴散運動。研究主要定性探討振動顆粒體在不同的振動條件下的熱傳現象；為了量化熱傳現象，進一步以逆運算法定量分析振動床之振動條件與熱擴散係數間的關係；另外因為顆粒自我擴散運動會增強顆粒熱傳，為證明兩者間的關係，本論文也將以影像處理及粒子追蹤的方式，計算出顆粒自我擴散係數，再將自我擴散係數與熱擴散係數進行比較，實驗結果顯示，熱擴散係數與自我擴散運動呈現線性正相關。

摘要(英)

This study investigates the effect of vertical vibration on the granular heat transfer phenomena. In order to qualify the thermal phenomena under different vibration conditions, the inverse numerical method is applied for estimating the effective thermal diffusivity of particle. Because the granular self-diffusivity can enhance the granular thermal performance, this study use Particle tracking velocimetry (PTV) to calculate the granular velocity and granular self-diffusivity. Then we compare the effective thermal diffusivity and granular self-diffusivity. The experimental results show that the effective thermal diffusivity increased with the increased granular self-diffusivity, and in a linear relationship.

關鍵字(中)

★ 顆粒
★ 振動床
★ 熱傳
★ 逆運算

關鍵字(英)

論文目次

摘要 I
Abstract II
致謝 III
目錄 IV
附表目錄 VI
附圖目錄 VII
符號說明 XIV
第一章簡介 1
1.1顆粒體簡介 1
1.2顆粒體在振動床中的運動行為 2
1.3振動床顆粒的熱傳行為 9
1.4逆向熱傳導問題 10
1.5研究動機 11
第二章實驗設備與分析方法 13
2.1研究設備 13
2.2實驗原理與方法 18
2.2.1實驗參數 18
2.2.2 顆粒熱傳性質分析 18
2.2.3顆粒的傳輸性質影像分析 22
2.3顆粒流動性質介紹 23
2.3.1自我擴散理論 23
2.4顆粒熱傳性質介紹 24
2.4.1標準差簡介 24
2.4.2熱擴散係數簡介 25
2.5實驗步驟 25
2.5.1加熱顆粒床 25
2.5.2影像分析 26
2.6誤差分析 26
第三章結果與討論 29
3.1振動床系統振動條件對於顆粒床溫度分佈之影響 30
3.1.1不同的振動頻率對於顆粒床溫度分佈之影響 30
3.1.2不同的振動加速度對於顆粒床溫度分佈之影響 32
3.2振動床系統振動條件對於顆粒運動行為之影響 32
3.3逆運算分析顆粒熱擴散係數 34
第四章結論 37
參考文獻 38

參考文獻

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指導教授

蕭述三(Shu-San Hsiau)

審核日期

2016-8-11

推文