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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 王興華(Ching-Hua Wang) | |
dc.contributor.author | Chi-Hao Lin | en |
dc.contributor.author | 林稚皓 | zh_TW |
dc.date.accessioned | 2021-06-16T17:53:05Z | - |
dc.date.available | 2013-08-19 | |
dc.date.copyright | 2012-08-19 | |
dc.date.issued | 2012 | |
dc.date.submitted | 2012-08-13 | |
dc.identifier.citation | 參考文獻
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/64535 | - |
dc.description.abstract | 液滴燃燒的研究領域中,主要的實驗方式可分為多孔性金屬球法、掛滴法以及液滴自由落下三種方式,此篇論文透過將自由落下之液滴置於一對沖流場中,觀察液滴在高溫環境中的燃燒情形,另外將落下之液滴置於一氣流向上吹的高溫流場場中,比較兩流場中液滴燃燒之差異,並與前人自由落滴的實驗結果做比較。在本實驗中主要量測之數據為液滴燃燒時間及點火延遲。實驗測試之油料以柴油、生質柴油以及上述兩油料與醇類、水混合之多組份油料為主。
本實驗設備利用高速攝影機得以觀察到液滴燃燒過程之暫態現象,由實驗結果得知對沖流場對於纯油料的燃燒時間並無明顯的影響。在雙組份油料燃燒過程中,吾人可以觀察到火焰縮口的現象發生時,液滴實際上經歷熄滅到再度點燃的過程。柴油與水無法互溶,必須透過添加乳化劑的方式,使兩者互相溶解形成穩定油料,在本實驗中,吾人透過柴油添加醇類及水的方式,將水混入柴油中,以此方式柴油可與低比例的水混合並形成穩定的油料。柴油與醇類/水混合油料之實驗中,添加醇類能夠降低碳粒的累積,火焰亮度降低;添加水後水微爆的發生使得液滴燃燒時間縮短,有助於提升燃燒的效率。 | zh_TW |
dc.description.abstract | In the study of droplet combustion, there are three major experimental method: the porous sphere method, droplet suspended method, free droplet method. This paper use the free droplet method to observe the droplet burning behavior in a counter flow field. By the way, we also put the freely falling droplet in an upward , high temperature flow field and compare with counter flow field condition. At the same time, we have also compared the data in this study with former freely falling type experiment data. In this experiment, we measure the droplet burning time and ignition delay. The tested fuels including diesel, biodiesel and the mixing of the above two fuels with alcohol and water.
In this experiment, we use high speed camera to record the transient burning phenomenon of a droplet. From the experiment result, we know that there is no different in burning time of a droplet in a counter flow field. As two component fuel burns, we observe that flame shrinkage,in reality, is the extinction of flame. Since diesel cannot dissolve in water, it has to went through the emulsion process to become a steady fuel mixture. In this experiment, we use alcohols to help water dissolve into diesel. In this way, diesel can mix with small amount of water. The addition of alcohol can reduce the soot accumulation and lower the flame luminous. The addition of water reduce the droplet burning time due to water microexplosion and improve the burning efficiency. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T17:53:05Z (GMT). No. of bitstreams: 1 ntu-101-R99522119-1.pdf: 20406611 bytes, checksum: 806799a96ec65bcc90f00b73bc10c95e (MD5) Previous issue date: 2012 | en |
dc.description.tableofcontents | 中文摘要 i
Abstract ii 誌謝 iii 目錄 iv 圖目錄 vi 第1章 緒論 1 1-1 前言 1 1-2 研究動機 2 1-3 研究目的 3 第2章 文獻回顧 4 2-1 基本理論 4 2-1.1 d2-law 4 2-1.2 點火延遲 5 2-1.3 液滴微爆及多組份液滴成核理論 6 2-1.4 火焰縮口 7 2-2 文獻回顧 7 2-2.1 乙醇、柴油及生質柴油混和油料之燃燒現象 8 2-2.2 生質柴油、柴油、乙醇混合油料於柴油引擎中測試 8 2-2.3 乳化燃料 10 2-2.4 柴油、醇及水混合油料 10 第3章 實驗設備與方法 13 3-1 液滴實驗方法 13 3-2 實驗及觀測設備 14 3-2.1 液滴產生器 16 3-2.2 高溫環境設備 21 3-2.3 觀測設備 24 3-3 實驗步驟及資料處理方法 27 3-3.1 實驗步驟 27 3-3.2 實驗資料處理方法 29 3-4 實驗環境分析與校正 30 3-4.1 燃燒環境分析 30 3-4.2 實驗儀器校正 32 第4章 結果與討論 39 4-1 柴油液滴 39 4-1.1 液滴速度分佈 47 4-1.2 液滴位置變化 48 4-2 生質柴油 50 4-2.1 液滴速度分佈 57 4-2.2 液滴位置變化 58 4-3 生質柴油加乙醇 60 4-4 生質柴油加甲醇 82 4-5 生質油料加乙醇 100 4-6 柴油加丙醇 105 4-7 生質柴油加丙醇 107 4-8 柴油丁醇水混合液 108 第5章 結論與未來展望 115 Appendix 120 | |
dc.language.iso | zh-TW | |
dc.title | 液滴於對沖流場中的燃燒行為 | zh_TW |
dc.title | The Burning Behavior of A Droplet in a Counterflow Field | en |
dc.type | Thesis | |
dc.date.schoolyear | 100-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 楊鏡堂,潘國隆,蔡曜陽 | |
dc.subject.keyword | 液滴燃燒,對沖流場,微爆現象,火焰縮口, | zh_TW |
dc.subject.keyword | droplet combustion,counter flow field,microexplosion,flame shrinkage, | en |
dc.relation.page | 120 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2012-08-13 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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