多組份燃油液滴於高溫環境下之燃燒現象觀察與研究

An Experimental Investigation on the Burning Characteristics of Multicomponent Droplets

黃振柏(Jhen-Bo Huang)

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(2009年)

https://doi.org/10.6342/NTU.2009.02953

摘要

本實驗主要將不同油料經過預混或乳化後形成多組份油料，再以Ink-Jet printing method產生穩定的自由液滴，進入高溫燃燒爐，觀察液滴的燃燒性質:點火延遲、燃燒時間、火焰縮口、微爆現象以及燃燒速率。實驗中第一部分以柴油、生質柴油、甲醇和乙醇，利用不同的液滴尺寸，觀察其燃燒現象，第二部份則將橄欖油、葡萄籽油、大豆油、玉米油、葵花油、乙醇和水分別和生質柴油和柴油預混燃燒，來探討多組份油料其物理性質差異對燃燒的影響。

實驗結果發現，當油料本身沸點與燃燒爐溫度差異越大時，其液滴尺寸對點火延遲時間的影響就越小。在預混油料方面，發現燃料沸點的差異與混和比例的大小，是影響點火延遲時間與火焰縮口時間的原因，並且進而造成燃燒效率的差異。

關鍵字

液滴 ； 乳化 ； 燃燒 ； 微爆 ； 火焰縮口

並列摘要

This experiment uses different fuel after premixed and emulsified to make the multicomponent fuel, then we apply Ink-Jet Printing method to generate the free droplets, into the combustion chamber freely and observe the characteristics of combustion : ignition delay, burning time, flame shrinkage, explosion and burning rate. In the first part of experiment, we use diesel, Bio-diesel, methanol and ethanol in the different droplet size respectively, to observe the characteristics of combustion. In the second part, we use olive oil, grapeseed oil, soybean oil, corn oil, sunflower oil, ethanol and water to mix with bio-diesel and diesel respectively, then observe the characteristics of premixture and discuss the effect of combustion from different physical property of multicomponent fuel.

From the experiment, we find when the more difference of temperature about fuel’s boiling point and combustion chamber, and the less distinction of ignition delay. For multicomponent, we find the reason why it’s affecting the ignition delay and flame shrinkage is because the distinguish of fuel’s boiling point and the proportion of multicomponent, that will affect the burning rate.

並列關鍵字

droplet ； emulsion ； combustion ； micro-explosion ； flame shrinkage

參考文獻

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