多組份液滴碰撞燃燒現象之研究

The Burning Characteristics of Collide-Mixed Fuel Droplets

鄭鼎彥(Ting-Yen Cheng)

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(2004年)

https://doi.org/10.6342/NTU.2004.01496

摘要

本實驗以Ink-Jet printing method 產生雙向自由液滴(Free droplet stream)於空氣中撞擊後進入高溫環境燃燒。以n-Hexadecane(C16H34)、n-Tetradecane(C14H30)為主，撞擊的油料選擇與其沸點差異大、易取得且燃燒產物不會造成污染的醇類（CH3 OH、C2H5 OH及C3H7 OH）與苯(C6H6)作碰撞結合燃燒，以期達到微爆所需之沸點差異。主要研究其微爆現象、點火延遲及燃燒速率。
實驗結果發現烷類與不可互溶之甲、乙醇油料碰撞結合後會使液滴的點火延遲增加，而烷類和醇類或醇苯混合物撞擊後燃燒，其所表現出的下點微爆都是屬於黏合型態的微爆機制。而醇苯混和確可增進燃油的燃燒效率。

關鍵字

燃燒 ； 碰撞 ； 微爆 ； 液滴

並列摘要

Experiment applies Ink-Jet Printing method to generate binary stable free droplets and collide-merged droplet fall along their path into high temperature environment. Paraffins, Alcohol and Benzene are used in this experiment. We will discuss some combustion characteristics such as burning rates, ignition delay, flame shrinkage and the micro-explosion phenomenon.

According to the experiment results, we find that the immiscible collide-merged droplets make the ignition delay increasing. Alcohol mix with benzene can increase the burning rate of the fuel.

並列關鍵字

droplet ； collision ； combustion ； microexplosion

參考文獻

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3. Lasheras, J. C., Fernandez-Pello, A. C. and Dryer, F. L., ” Initial Observations on the Free Combustion Characteristics of Water-In-Fuel Emulsions,” Combustion Science and Technology, Vol. 21, (1979), pp. 1-14

4. J. C. Lasheras, Fernandez-Pello, and F. L. Dryer, ” Experimental Observations on the Disruptive Combustion of Free Droplets of Multicomponent Fuels,” Combustion Science and Technology, Vol. 22, p.195, (1980)

5. C. H. Wang, X. Q. Liu ,and C. K. Law, ”Combustion and Microexplosion of Free Falling Multi-component Droplets,” Combustion and Flame, Vol. 56, p.175, (1984)