本文以貧油燃燒為研究主軸，利用實驗方法探討三環燃燒器中，透過三股環形預混火焰間交互作用，拓展貧油可燃極限之效果，並以此為參考基礎，獲得三環非單一當量比之燃燒流場特性，包括火焰型態、溫度場分佈、流場結構、燃燒氣體濃度。結果發現，三股火焰間之交互作用行為，確實有助於貧油燃燒進行，並可拓展貧油燃燒極限，達超貧油燃燒之目標。
二股接近貧油可燃極限之環形火焰彼此輔助燃燒進行，若內環火焰燃料比例過低，會影響外環原先可燃之燃氣，導致整體火焰熄滅。利用內環當量比較高之火焰幫助外環當量比低之燃氣，能使原先不可燃之外環燃氣變得可燃。在流場穩定之大型三環燃燒器中，設定出口流速1 m/s，總當量比及外環當量比0.6，改變內、中環當量比可歸納出四種火焰型態，分別是外無焰、中高型、中低型、及內無焰。其中，中高型中環火焰f =0.45已超出其本身貧油可燃極限0.6，達到利用火焰間保護與交互作用，拓展貧油可燃極限之目的。
四種火焰型態之燃燒特性與當量比息息相關，顯示主宰著初始火焰強度的當量比，影響各項燃燒及流場特性。四種火焰型態中，外無焰溫度分佈不均，一氧化碳生成量過高，燃料轉換率不佳，不是理想的燃氣搭配。中高型、中低型、及內無焰，在溫度場分佈、汙染物濃度表現相近，而中高型燃料轉換率最高，表現優於其餘二者。

目錄
摘要 i
Abstract ii
目錄 iii
表目錄 vii
圖目錄 viii
符號說明 xiii
第一章 前言 1
第二章 文獻回顧 3
2-1 燃燒基本概念 3
2-1-1 燃料選擇 4
2-1-2 燃燒模式 5
2-1-3 火焰模式 7
2-1-4火焰流場結構 8
2-1-5 汙染物 9
2-2 貧油燃燒特性 10
2-3 可燃極限 12
2-4 拓展貧油可燃極限 13
2-4-1觸媒反應 13
2-4-2 非均質燃料燃燒 14
2-4-3 預熱效應 14
2-4-4 燃燒器設計 15
2-5 火焰交互作用 16
第三章 研究方法 18
3-1 火焰型態 19
3-1-1 燃燒模式 19
3-1-2 當量比 20
3-1-3 火焰型態觀測 21
3-1-3.1 燃燒器外型 21
3-1-3.2 實驗設備配置 23
3-1-3.3 氣體供應系統 24
3-1-3.4 流量控制系統 25
3-1-3.5 影像記錄系統 26
3-1-3.6 外罩 26
3-2 貧油可燃極限 27
3-3 PIV流場 28
3-3-1 PIV簡介 28
3-3-2 PIV原理 30
3-3-3 PIV流場觀測 32
3-3-3.1 PIV實驗設備系統 33
3-3-3.2 追縱粒子 33
3-3-3.3 粒子導入設備 34
3-3-3.4 雷射系統 35
3-3-3.5 透鏡組 36
3-3-3.6 高速攝影機 36
3-4 溫度場量測 37
3-5 燃燒氣體量測 40
第四章 結果與討論 44
4-1 不同環間距之三環燃燒器可燃範圍 44
4-2 不同環間距燃燒器之火焰型態 46
4-3 小型三環燃燒器 48
4-3-1 各環之火焰型態 48
4-3-2 各環之火焰高度 51
4-3-3 火焰非單一當量比搭配 52
4-4 中型三環燃燒器 57
4-4-1各環之火焰型態 57
4-4-2 各環之火焰高度 60
4-4-3 火焰非單一當量比搭配 60
4-5 大型三環燃燒器 64
4-5-1各環之火焰型態 65
4-5-2 各環之火焰高度 67
4-5-3 火焰非單一當量比搭配 68
4-5-4 火焰溫度場 71
4-5-5 燃燒流場 82
4-5-6 燃燒氣體 99
4-5-6.1 氧氣(O2) 100
4-5-6.2 一氧化碳(CO) 102
4-5-6.3 二氧化碳(CO2) 103
4-5-6.4 氮氧化物(NOx) 105
第五章 結論與展望 108
5-1 結論 108
5-2 未來展望 110
第六章 參考文獻 111

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