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研究生： 吳展易
Wu, Zhan-Yi
論文名稱： KIVA-3V應用在密閉式柴油引擎在不同進氣組成下之燃燒模擬與分析
Combustion Simulation and Analysis Using KIVA-3V for Different Intake Gas Contents in Close Cycle Diesel Engin
指導教授： 吳鴻文
Wu, Horng-Wen
學位類別： 碩士
Master
系所名稱： 工學院 - 系統及船舶機電工程學系
Department of Systems and Naval Mechatronic Engineering
論文出版年： 2005
畢業學年度： 93
語文別： 中文
論文頁數： 75
中文關鍵詞： 進氣組成 、密閉式循環柴油引擎 、燃燒分析
外文關鍵詞： close cycle diesel engine, intake gas contents, combustion analysis
相關次數： 點閱：64  下載：1 
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    • 密閉式柴油引擎（CCDE）可應用於潛航器的發電系統的動力來源，因密閉式循環引擎需採用人造大氣，所以進行不同進氣組成對密閉式循環柴油引擎的性能分析是非常重要的。
    本文針對KUBOTA RK-125 型之單缸直噴式柴油引擎進行數值模擬，以KIVA3V-RELEASE2為程式主體，藉由修改程式進氣組成的部份，在不同引擎轉速下，採用不同組成分率之氬氣、氮氣與氧氣搭配，進行數值運算分析。並檢視不同進氣組成下，引擎氣缸內流場與溫度場，並將模擬結果與實驗比較。
    本研究已成功將柴油引擎之進氣過程導入氬氣，並且成功開啟KIVA3V-RELEASE2之化學反應機制。模擬結果顯示氬氣取代氮氣比例越高則缸內燃氣壓力會提早升高，並且著火延遲會提前。雖然KIVA程式已應用於各式引擎之模擬，但是卻尚未應用於密閉式循環柴油引擎。因此期望本研究的模擬經驗與數據，可供國內從事絕氣式動力系統相關研究人員參考。

    The close cycle diesel engine (CCDE ) can be applied to the power source of the electricity generation system of the submerge device. Because the close cycle diesel engine needs to adopt the artificial atmosphere, it is very important to proceed the analysis of performance to the close cycle diesel engine with different intake gas contents.
    This article is aimed at the KUBOTA RK-125 which is single cylinder direct injection diesel engine, and carries out the numerical simulation. KIVA3V-RELEASE2 is used as the subject of the program , according to modifying the different intake gas contents in program adopting different proportion of the oxygen, argon and nitrogen under different speed of engine. And the in-cylinder flow and temperature field are investigated for different intake gas contents, and the result between the simulation and the experiment will be compared .
    The research has already entered argon successfully in the intake process, and succeed in opening the chemical reaction mechanism of KIVA3V-RELEASE2. The simulation result shows that the pressure will rise more early if the percentage of argon is higher when using the argon replaces nitrogen, and the ignition delay will be more early advanced, too. Although KIVA program has already been applied to the simulation of various types of engines, it has not been applied to the close cycle diesel engine. So the simulation experience and data of this research are expected to be suitable for the researcher who is engaged in CCDE system , and will give them some refers.

    摘要............................................. I Abstract......................................... II 致謝.............................................III 目錄............................................. IV 圖表目錄......................................... VI 符號說明......................................... X 第一章 緒論.................................... 1 1-1 前言......................................... 1 1-2 文獻回顧..................................... 5 1-3 研究方向與貢獻............................... 9 第二章 理論模式.................................. 10 2-1 問題描述.............................. 10 2-2 系統之假設及邊界條件.................. 10 2-3 統御方程式............................ 12 2-3.1 氣相統御方程式.................. 12 2-3.2 液相統御方程式.................. 15 第三章 數值方法.................................. 19 3-1 KIVA程式簡介.......................... 19 3-2 格點系統.............................. 21 3-2.1 網格點定義...................... 21 3-3 數值方法介紹.......................... 24 第四章 結果與討論................................ 28 4-1 柴油引擎之冷流場模擬.................. 28 4-2 實驗與模擬之分析比較.................. 30 4-3 不同進氣組成下之燃燒模擬.............. 32 第五章 結論與未來展望............................ 35 5-1 結論.................................. 35 5-2 未來展望.............................. 36 參考文獻......................................... 38 自述............................................. 75 圖表目錄 表一 KUBOTA RK125 型直噴式柴油引擎規格...................42 圖1 CCDE原理圖..........................................43 圖2 密閉式循環柴油引擎系統圖.............................43 圖3 氣缸幾何外型格點圖..................................45 圖4 活塞凹槽示意圖......................................46 圖5 一般格點示意圖......................................47 圖6 動量格點部份示意圖..................................47 圖7 網格表面控制體積示意圖..............................47 圖8 KIVA程式運作流程圖..................................48 圖9 KIVA程式運作流程圖(續)..............................49 圖10 KIVA程式使用流程...................................50 圖11 曲柄角60度下之缸內流場向量圖（1800rpm）.............51 圖12 曲柄角60度下之缸內流場流線圖（1800rpm）.............51 圖13 曲柄角120度下之缸內流場向量圖（1800rpm）............52 圖14 曲柄角120度下之缸內流場流線圖（1800rpm）............52 圖15 曲柄角180度下之缸內流場向量圖（1800rpm）............53 圖16 曲柄角180度下之缸內流場流線圖（1800rpm）............53 圖17 曲柄角240度下之缸內流場向量圖（1800rpm) ............54 圖18 曲柄角240度下之缸內流場流線圖（1800rpm）............54 圖19 曲柄角300度下之缸內流場向量圖（1800rpm）............55 圖20 曲柄角300度下之缸內流場流線圖（1800rpm）............55 圖21 曲柄角340度下之缸內流場向量圖（1800rpm）............56 圖22 曲柄角340度下之缸內流場流線圖（1800rpm）............56 圖23 曲柄角360度下之缸內流場向量圖（1800rpm）............57 圖24 曲柄角360度下之缸內流場流線圖（1800rpm）............57 圖25 曲柄角540度下之缸內流場向量圖（1800rpm）............58 圖26 曲柄角540度下之缸內流場流線圖（1800rpm）............58 圖27 曲柄角640度下之缸內流場向量圖（1800rpm）............59 圖28 曲柄角640度下之缸內流場流線圖（1800rpm）............59 圖29 ar=0時之實驗與模擬之氣缸壓力比較（1800rpm）.........60 圖30 ar=5時之實驗與模擬之氣缸壓力比較（1800rpm）.........60 圖31 ar=10時之實驗與模擬之氣缸壓力比較（1800rpm）........61 圖32 ar=15時之實驗與模擬之氣缸壓力比較（1800rpm）........61 圖33 ar=20時之實驗與模擬之氣缸壓力比較（1800rpm）........62 圖34 Kong【34】對case1及case2之氣缸壓力比較..............62 圖35 Kong【34】對case1及case3之氣缸壓力比較..............63 圖36 Kong【35】KIVA程式模擬與實驗量測氣缸壓力比較........63 圖37 不同進氣組成之壓力圖（1800rpm）.....................64 圖38 不同進氣組成之溫度圖（1800rpm) .....................64 圖39 不同進氣組成之壓力圖（1500rpm）.....................65 圖40 不同進氣組成之溫度圖（1500rpm）.....................65 圖41 不同進氣組成之壓力圖（1200rpm）.....................66 圖42 不同進氣組成之溫度圖（1200rpm）.....................66 圖43 1800rpm時，ar=0、CA=390之各平面缸內溫度分佈圖.......67 圖44 1800rpm時，ar=20、CA=390之各平面缸內溫度分佈圖......67 圖45 1800rpm時ar=0之缸內x-z平面溫度分佈圖................68 圖46 1800rpm時ar=5之缸內x-z平面溫度分佈圖................68 圖47 1800rpm時ar=10之缸內x-z平面溫度分佈圖...............69 圖48 1800rpm時ar=15之缸內x-z平面溫度分佈圖...............69 圖49 1800rpm時ar=20之缸內x-z平面溫度分佈圖...............70 圖50 1500rpm時ar=0之缸內x-z平面溫度分佈圖................70 圖51 1500rpm時ar=5之缸內x-z平面溫度分佈圖................71 圖52 1500rpm時ar=10之缸內x-z平面溫度分佈圖...............71 圖53 1500rpm時ar=15之缸內x-z平面溫度分佈圖...............72 圖54 1500rpm時ar=20之缸內x-z平面溫度分佈圖...............72 圖55 1200rpm時ar=0之缸內x-z平面溫度分佈圖................73 圖56 1200rpm時ar=5之缸內x-z平面溫度分佈圖................73 圖57 1200rpm時ar=10之缸內x-z平面溫度分佈圖...............74 圖58 1200rpm時ar=15之缸內x-z平面溫度分佈圖...............74 圖59 1200rpm時ar=20之缸內x-z平面溫度分佈圖...............75

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