本論文以實驗的方式探討噴霧冷卻之熱場特性，本研究所採用的噴嘴口徑 (dj) 為200 μm，加熱面積為45 mm × 45 mm。本論文主要分成兩個部份進行實驗及分析討論。第一部份針對工作流體為純水 (DI water) 與介電液 (FC-72)，在不同功率下觀測加熱器表面液膜厚度的變化，並以熱傳率 (Q) 與操作壓力 (ΔP) 為主要參數，探討這兩項參數對於噴霧冷卻的液膜厚度的影響。第二部份針對工作流體為DI water，利用μLIF系統 (螢光染劑為Rhodamine B其濃度為1.5×10-4 M) 的方式量測不同工作流體溫度 (23 °C、30 °C及40 °C) 對於噴霧的全域溫度分佈、加熱器表面液膜溫度變化與噴霧冷卻的熱場情況，探討液滴在冷卻過程中，內部的物理現象。

The aim of this study was to explore the properties of thermal field in spray cooling via experiments. The nozzle diameter (dj) used herein was 200 μm and the heating surface measured 45 mm × 45 mm. The study was divided into two parts for experiments and analyses. In the first part, with DI water and FC-72 (dielectric liquid) as the working media, the changes in the liquid film thickness on the heater surface under different values of heating power were observed; heat input (Q) and value of gauge pressure (ΔP) were taken as the main parameters for discussing the influence of these two parameters on the liquid film thickness in spray cooling. The second part, with DI water as the working medium, adopted the μLIF system (fluorescent dye: Rhodamine B; concentration: 1.5×10-4 M) to measure the effect of different working medium temperatures (23 °C, 30 °C, and 40 °C) on the global temperature distribution, liquid film temperature changes on the heater surface and the thermal field condition of spray cooling, with an aim of exploring the internal physical phenomena of the droplets during cooling.

目錄.......................................................................................... i
表目錄.................................................................................. iii
圖目錄.................................................................................... iv
符號說明................................................................................ vi
中文摘要.............................................................................. viii
英文摘要................................................................................ ix
第一章　序論........................................................................ 1
1-1 前言................................................................................ 1
1-2 噴霧冷卻發展之背景.................................................... 2
1-3 文獻回顧........................................................................ 4
1-4 研究目的...................................................................... 13
第二章　實驗系統與設備.................................................. 14
2-1 μLIF系統...................................................................... 14
2-2 噴霧系統...................................................................... 15
2-3 實驗環路系統.............................................................. 15
2-3-1 噴霧閉環路系統...................................................... 16
2-3-2 噴霧恆溫循環系統.................................................. 17
2-4 測試區......................................................................... 17
2-5 加熱系統..................................................................... 17
第三章　實驗方法及步驟.................................................. 26
3-1 工作流體配製.............................................................. 26
3-2 光學量測系統建立及原理.......................................... 26
3-3 噴霧液膜厚度觀測...................................................... 28
第四章　理論分析.............................................................. 32
4-1 韋伯數 (We) 定義與計算........................................... 32
4-2 雷諾數 (Re) 定義與計算............................................ 34
4-3 紐塞數 (Nu) 定義與計算............................................ 34
4-4 賈克布數 (Ja) 定義與計算......................................... 35
4-5 噴霧錐角 (β) 定義....................................................... 36
4-6 質量通量 (G) 計算...................................................... 36
4-7 沸騰數 (Bo) 定義與計算............................................ 37
第五章　誤差分析.............................................................. 39
第六章　結果與討論.......................................................... 42
6-1 噴霧特性分析.............................................................. 42
6-2 噴霧熱場分析.............................................................. 44
6-3 液膜厚度觀測.............................................................. 45
第七章　結論與建議.......................................................... 65
7-1 結論.............................................................................. 65
7-2 建議與改進.................................................................. 66
參考文獻.............................................................................. 67
附錄A.................................................................................... 74

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