本研究主要目的發展一套簡易的油滴蒸發實驗裝置，利用一個加熱的錐形孔座，通入熱空氣，藉由熱空氣的支撐使油滴可以穩定蒸發。利用高速攝影機觀察並紀錄油滴隨時間變化的蒸發歷程，實驗中油滴位置穩定，因此觀察及量測皆可精確的進行。本實驗測試燃料包含醇類(甲醇、乙醇)，烷類(7烷、8烷、10烷、12烷、16烷)，與混合燃料E75(乙醇75%、純水25%)以及純水作為一系列的研究項目。實驗中主要探討燃油液滴在不同受熱環境(450℃、5500C、6000C)下的蒸發熱值並與理論值做比較，理論值採用d2law(液滴直徑平方與時間歷程之線性關係)。重複性實驗結果發現：純物質(醇類、烷類)，混合燃料(E75)與純水對於穩定油滴之蒸發速率皆呈線性關係，文中針對既有d2law理論式進行修正，並驗證所研製實驗裝置的可行性。

This study developed a simple and innovative test cell to investigate liquid droplet evaporation characteristics. Hot air, introducing through a heated conical diffuser, floated and evaporated stably the investigated liquid droplet. The video recording equipment included a high-speed video camera and digital camera, and all recorded videos and photos were saved directly to a computer. The target liquids in this experiment were alcohol (methanol and ethanol), alkane (heptane, octane, decane,
dodecane, and hexadecane), blended fuels (E75) and pure water.
In this study, the evaporation rates of floating liquid droplets was experimentally analyzed and compared to the the oretical d2-law values. It is obvious that the target liquid droplets show a linear evaporation rate. A modified d2-law correlation for the liquid droplet evaporation rate was proposed. Feasibility of the established test cell was also approved.

摘要 iv
英文摘要 v
誌謝 vi
目次 vii
表目錄 ix
圖目錄 x
附錄 xii
第一章 緒論 1
1-1 前言 1
1-2文獻回顧 2
1-2-1 多孔性圓球模擬法 2
1-2-2 -液滴懸掛法 2
1-2-3 自由飛行液滴法 3
1-3 研究動機及目的 6
第二章 實驗設備與方法 7
2-1整體實驗設備 7
2-1-1液滴漂浮座 7
2-1-2液滴供應系統 8
2-1-3加熱系統 8
2-1-4供氣系統 9
2-1-5蒸發行為觀測系統 9
2-1-6實驗步驟 10
2-2實驗方法 12
2-2-1直徑平方定律 12
2-2-2實驗用燃料及其理論K值 13
第三章 實驗結果與討論 19
3-1各別燃料之蒸發速率常數k 19
3-1-1醇類燃料 19
3-1-2烷類燃料 20
3-1-3純水及混合燃料 23
3-2修正K值之比較 24
第四章 結論 25
參考文獻 26
符號彙編 29

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