臺灣博碩士論文加值系統

本實驗以Ink-Jet printing method 產生雙向自由液滴(Free droplet stream)於空氣中碰撞後，進入高溫環境燃燒，研究其點火延遲、燃燒現象、微爆等等，實驗中使用燃料為n-Hexadecane(C16H34)、n-Heptane(C7H16)、Methanol(CH3OH)和不可燃液滴H2O。利用碰撞的機制使不可溶性液滴(C16H34與H2O及C16H34與CH3OH)之間能在沒有乳化劑的情形下產生結合之液滴，將這結合液滴進入燃燒室觀察其燃燒之情形以暸解不可溶液滴在沒有乳化劑影響下的燃燒情況。另比較可溶液滴(C16H34與C7H16)碰撞與預混之間的差別。
實驗中發現水在不同直徑比例下與C16H34固定直徑碰撞後其燃燒現象大致上有三種情形，一為發生火焰微爆現象，二為火焰熄滅，三為火焰熄滅後再微爆，而甲醇與C16H34碰撞後燃燒則會產生強烈的微爆現象。而在可溶液滴(C16H34與C7H16)在本實驗的條件之下，其碰撞後及預混的燃燒結果及火焰現象是相同的。

第一章 緒論………………………………………………………1
※ 1-1 前言 ……………………………………………1
※ 1-2 文獻回顧 ………………………………………2
※ 1-3 研究動機與目的 ………………………………6
第二章 實驗設備及實驗步驟……………………………………8
※ 2-1液滴產生方式……………………………………8
※ 2-2實驗設備…………………………………………10
2-2.1 高溫燃燒爐 ……………………………10
2-2.2 液滴產生器 ……………………………11
2-2.3電子控制器………………………………12
2-2-4影像擷取系統……………………………13
2-2-5液滴碰撞機構……………………………14
2-2-6冷卻系統…………………………………14
※ 2-3實驗步驟及資料處理方法………………………14
第三章 結果與討論………………………………………………18
※ 3-1不可互溶液滴碰撞燃燒…………………………18
3-1.1 Water與C16H34碰撞燃燒………………19
3-1.2甲醇與C16H34碰撞燃燒…………………28
※ 3-2可溶性油滴之碰撞燃……………………………30
第四章 結論………………………………………………………36

1. N. Ashgriz and P. Givi, “Binary Collision Dynamics of Fuel Drople”, Intl. J. Heat Fluid Flow, Vol. 8, No. 3, pp. 205-210, (1987)
2. C. K. Law, “Multicomponent Droplet Combustion with Rapid Internal Mixing”, Combustion and Flame, Vol. 26, pp. 219, (1976)
3. P. Lara-Urbanejo and W. A. Sirignano, “Theory of Transient Multicomponent Droplet Vaporization in A Convective Field”, Eighteenth Symposium (international) on Combustion, the Combustion Institute, Pittsburgh, Pa., pp. 1365, (1981)
4. C. K. Law, ”Internal Boiling and Superheating in Vaporizing Multi-component Droplets”, AICHE Journal, Vol. 24, pp. 626, (1978)
5. J. C. Lasheras, A. C. Fernandez-Pello, and F. L. Dryer, ” Experimental Observations on the Disruptive Combustion of Free Droplets of Multicomponent Fuels”, Combustion Science and Technology, Vol. 22, pp. 195-209, (1980)
6. C. K. Law and H. K. Law, “A d2-Law for Multicomponent Droplet Vaporization and Combustion”, AIAA Journal, Vol. 20, No. 4, pp.522, (1982)
7. C. H. Wang, X. Q. Liu and C. K. Law, ”Combustion and Microexplosion of Free Falling Multi-component Droplets”, Combustion and Flame, Vol. 56, pp175, (1984)
8. A. L. Randolph, A. Makino and C. K. Law, ”Liquid Phase Diffusion Resistance in Multi-component Droplet Gasification”, 21th Symposium (International) on Combustion, the Combustion Institute, Pittsburgh, Pa., pp. 601, (1986)
9. J. C. Lasheras, A. C. Fernandez-Pello, and F. L. Dryer, ” Initial Observations on the Free Combustion Characteristics of Water-In-Fuel Emulsions”, Combustion Science and Technology, Vol. 21, pp. 1-14, (1979)
10. J. C. Lasheras, I. M. Kennedy and F. L. Dryer, ” Burning of Distillate Fuel Droplet Containing Alcohol or Water:Effect of Additive Concentration”, Combustion Science and Technology, Vol. 26, pp. 161-169, (1981)
11. C. H. Wang, and J. T. Chen, “An Experimental Investigation of the Burning Characteristics of Water-oil Emulsions”, Int. Comm. Heat Mass Transfer, Vol. 23, No. 6, pp. 823-834, (1996)
12. G. S. Jackson and C. T. Avedisian, “Combustion of unsupported water-in-n-heptane emulsion droplets in a convection-free environment”, Int. J. Heat Mass Transfer, Vol. 41, No. 16, pp. 2503-2515, (1998)
13. Javier M. Ballester, Norberto Fueyo and César Dopazo, “Combustion characteristics of heavy oil-water emulsions’’, Fuel, vol. 75, No. 6, pp 695-705, (1996)
14. Vargaftik, N. B, “Tables on the Thermophysical Properties of Liquids and Gases”, 2nd. ed, Wiley, New York, (1975)
15. B. J. Wood and W. A. Rosser, ”An experimental study of fuel droplet ignition”, AIAA Journal ,Vol. 7, pp. 2288, (1969)
16. J. J. Sangiovanni and A. S. Kesten, ”A Theoretical and Experimental Investigation of the Ignition of the Fuel Droplets”, Combustion Science and Technology, Vol. 16, pp. 59, (1977)
17. T. B. Low and R. List, “Collision ,coalescence and breakup of raindrops Part 2: Parameterization of fragment size disturbution”, J. Atm. Sci., Vol. 39, pp. 1607-1618, (1982)
18. N. Ashgriz and P. Givi “Coalescence Efficiencies of Fuel Droplets in Binary Collision”, Int. Comm. Heat Mass Transfer, Vol. 16, pp. 11-20, (1987)
19. N. Ashgriz and J. Y. Poo, ”Coalescence and Separation in Binary Collisions of Liquid Droplets”, J. Fluid Mech., vol. 221, pp. 183-204, (1992)
20. Y. J. Jiang, A. Umemura and C. K. Law, ”An Experimental Investigation on the Collision Behavior of Hydrocarbon Droplets”, J. Fluid Mech., vol. 234, pp. 171-190, (1992)
21. J. Qian and C. K. Law, “Regimes of Coalescence and separation in Droplet Collision”, J. Fluid Mech., Vol.331, pp. 59-80, (1997)
22. 高天冀, “液滴碰撞行為分析和液滴產生器研發設計”, 國立成功大學機械工程學研究所碩士論文, (1998)
23. Kenneth Kuan-yun Kuo, “Principles of Combustion”, Wiley, New York, (1986)
24. J. J. Sangiovanni and L. G. Dodge, “Observations of Flame Structure in Combustion of Monodispered Droplet Streams”, Seventeenth Symposium (International) on Combustion, The Combustion Institute, Pittsburgh, Pa., (1978)
25. C. T. Avedisian and R. P. Amdres, “Bubble Nucleation in Superheated Liquid-Liquid Emulsions”, J. of Colloid and Interface Science, Vol. 64, No. 3, (1978)