油、水、醇乳化燃燒現象研究

An Experimental Study on the Burning Characteristics of Binary-Fuel and Water-in-oil Droplets

陳文進(Wen-Jin Chen)

指導教授 ： 王興華

國立臺灣大學/工學院/機械工程學研究所/碩士(2010年)

https://doi.org/10.6342/NTU.2010.01350

摘要

本實驗主要以Ink-Jet printing method產生穩定的自由液滴，進入高溫燃燒爐，觀察其燃燒現象，選定的油料為柴油、煤油、生質柴油、鍋爐油、生質油、甲醇及乙醇等，分別探討點火延遲、燃燒時間、燃燒速率及d2-t等現象。本實驗第一步為探討純油料之燃燒特性，為預混燃燒先做基礎，接著嘗試將不同油料混合後燃燒，研究多組份油料之物理性質差異對燃燒現象之影響，最後將煤油、水及甲醇乳化，觀察乳化液穩定性以及其燃燒特性，如微爆等現象。

實驗結果發現生質柴油預混乙醇發生了火焰縮口，與鍋爐油預混後的油料皆產生了連續微爆現象，煤油與水乳化後燃燒會發生熄滅現象，並抑制了碳微粒量的產生；而多組份油料預混後的微爆現象都不盡相同。

關鍵字

液滴 ； 乳化 ； 微爆 ； 點火延遲 ； 燃燒速率

並列摘要

Experiment applies Ink-Jet Printing method to generate free droplets. The fuels we use are diesel, biodiesel, kerosene, boiler fuel oil, biomass oil, methanol and ethanol. The droplets will fall into the combustion chamber, then we could observe the characteristics of combustion, like ignition delay, micro-explosion, burning time, burning rate, flame shrinkage and d2-Law. In order to establish the basis of premix combustion, we first investigate the burning phenomenon of pure fuels, and then we mix different fuels to study the influence of physical property. In the end we emulsify the kerosene with water and methanol, to observe the stability of emulsion and burning characteristics, like micro-explosion.
From the experiment, we find that biodiesel mixed with ethanol causes the flame shrinkage, the micro-explosion is continuous when fuels mixed with boiler fuel oil. And the kerosene emulsified with water and methanol which reduce the quantity of soot.

並列關鍵字

droplet ； emulsion ； microexplosion ； ignition delay ； burning rate

參考文獻

23.黃振伯, “多組份燃油液滴於高溫環境下之燃燒現象觀察與研究,” 國立台灣大學機械工程研究所碩士論文, 2009.

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