系統識別號 | U0002-2007202012165500 |
---|---|
DOI | 10.6846/TKU.2020.00581 |
論文名稱(中文) | 多重脈衝爆震管性能的數值分析 |
論文名稱(英文) | Numerical Analysis Performance of Multiple Pulse Detonation Tubes |
第三語言論文名稱 | |
校院名稱 | 淡江大學 |
系所名稱(中文) | 航空太空工程學系碩士班 |
系所名稱(英文) | Department of Aerospace Engineering |
外國學位學校名稱 | |
外國學位學院名稱 | |
外國學位研究所名稱 | |
學年度 | 108 |
學期 | 2 |
出版年 | 109 |
研究生(中文) | 吳聲昌 |
研究生(英文) | Sheng-Chang Wu |
學號 | 607430278 |
學位類別 | 碩士 |
語言別 | 繁體中文 |
第二語言別 | 英文 |
口試日期 | 2020-07-03 |
論文頁數 | 85頁 |
口試委員 |
指導教授
-
牛仰堯(yyniu@mail.tku.edu.tw)
委員 - 曾建洲(tsengch@mail.ncku.edu.tw) 委員 - 周逸儒(yjchou@iam.ntu.edu.tw) |
關鍵字(中) |
脈衝爆震引擎 爆震波 推進性能 |
關鍵字(英) |
Pulse Detonation Engines Detonation Wave Propulsive Performance |
第三語言關鍵字 | |
學科別分類 | |
中文摘要 |
爆震過程非常接近恆定體積的燃燒過程,基於恆定體積燃燒過程的發動機具有比傳統恆壓燃燒循環過程的發動機有更高的熱力學效率,熱力學循環效率的潛在優勢成為了研究爆震發動機的主要原因。而噴嘴研究表明,脈衝爆震引擎使用收縮-發散噴嘴顯著提高了推進性能,對於給定的填充時間,考慮了點火壓力、點火區間、閥門關閉及吹掃時間對單管脈衝爆震引擎的推力影響。為了比較單管脈衝爆震引擎和多管脈衝爆震引擎性能上的優劣,分別模擬了多管不同點火頻率去探討其推力的性能分析,與單管結果的比較發現,多管設計在特定的操作頻率方面提高了發動機性能穩定性和脈衝值。而在本研究中使用了HMSTH type AUSMD方法來解決爆震波中的問題,分析了單管和多管爆震引擎中噴嘴內部及噴嘴出口的震波差異。 |
英文摘要 |
The detonation process is very close to the constant volume combustion process, engines based on a constant volume combustion process have higher thermodynamic efficiency than traditional constant pressure combustion cycle engines, the potential advantage of thermal cycle efficiency has become the main reason for studying knock engines. Nozzle studies have shown that the use of convergent-divergent nozzles in pulse detonation engines can significantly improve propulsion performance. For a given filling time, the thrust of a single-tube pulse detonation engine is considered by the ignition pressure, ignition interval, valve closing and purge time. In order to compare the advantages and disadvantages of single-tube pulse detonation engine and multi-tube pulse detonation engine, the multi-tube simulation performance with different ignition frequency and thrust performance is discussed. Compared with the single-tube results, it was found that the multi-tube improves the stability and pulse value of engine performance. This study uses the HMSTH AUSMD method to solve the detonation wave problem, and analyzes the difference between the shock wave at the nozzle of the single-tube and multi-tube detonation engines and the shock wave at the nozzle outlet. |
第三語言摘要 | |
論文目次 |
目錄 III 符號表 VI 圖目錄 VIII 表目錄 XI 第一章 緒論 1 1.1 研究背景 1 1.2 研究動機與目的 7 1.3 本文內容 9 第二章 文獻回顧 10 2.1爆震物理現象 10 2.1.1 Chapman–Jouguet (CJ)理論 10 2.1.2 Zeldovich、von Neumann and Doring (ZND)的爆炸結構 13 2.3爆震引擎 15 2.3.1單管爆震引擎 15 2.3.2多管爆震引擎 16 第三章 研究方法 18 3.1統御方程 18 3.2 Advection Upwind Splitting Method(AUSMD) 20 3.3 Strang Splitting 25 3.4 MUSCL 27 3.5 THINC-EM 28 3.6 HMSTH 29 第四章 模擬分析 31 4.1 模型建立 31 4.2推進性能的計算 34 4.3初始條件 35 4.4邊界條件 36 4.5單管震波物理現象 36 4.6多管震波物理現象 43 第五章 成果與討論 56 5.1模擬參數 56 5.1.1點火範圍及壓力對推力分析 56 5.1.2單管操作頻率 59 5.1.3雙管操作時間差 61 5.1.4三管操作時間差 65 5.2結論 70 參考文獻 73 附錄A 78 圖目錄 圖1- 1理想PDE的循環操作示意圖 6 圖2- 1爆炸波的一維模型( MA, 2003) 10 圖2- 2RAYLEIGH-HUGONIOT曲線( KUO, 1986) 12 圖2- 3通過爆震波後的物理參數( FROM KUO, 1986) 14 圖3- 1一維黎曼問題的結構 22 圖4- 1雙管PDE的計算域 31 圖4- 2三管PDE的計算域 32 圖4- 3 170700網格 32 圖4- 4兩根爆震管與噴嘴 33 圖4- 5三根爆炸管與噴嘴 33 圖4- 6 PDE操作順序 34 圖4- 7第一個操作週期中馬赫數的時間演化 39 圖4- 8第一個操作週期中密度梯度場的時間演化 40 圖4- 9壓力噴嘴的分布圖 42 圖4- 10壓力出口的分布圖 42 圖4- 11密度梯度場與時間演化 45 圖4- 12第一個週期內密度梯度場的時間演化 48 圖4- 13噴嘴出口的壓力分布 50 圖4- 14第一個循環期間管與噴嘴之間的流動相互作用 51 圖4- 15 爆震管中(A)頭端和(B)出口處下、中、上管壓力與時間演化 53 圖4- 16單管與三管在(A)噴嘴喉部和(B)噴嘴出口中點處的馬赫數與時間演化 55 圖5- 1不同點火壓力對推力分析 57 圖5- 2不同點火範圍中火焰速度隨時間變化 59 圖5- 3單管不同閥門開關衝量與週期變化 60 圖5- 4上管延遲0.5毫秒在軸向上與單管的瞬時推力 62 圖5- 5上管延遲1毫秒在軸向上與單管的瞬時推力 62 圖5- 6上管延遲1.5毫秒在軸向上與單管的瞬時推力 63 圖5- 7上管延遲2毫秒在軸向上與單管的瞬時推力 63 圖5- 8第三週期中不同延遲時間雙管軸向的瞬時推力 64 圖5- 9雙管不同延遲時間衝量與週期變化 65 圖5- 10每管延遲0.5毫秒在軸向上與單管的瞬時推力 67 圖5- 11每管延遲1毫秒在軸向上與單管的瞬時推力 67 圖5- 12上管延遲1.5毫秒在軸向上與單管的瞬時推力 68 圖5- 13上管延遲2毫秒在軸向上與單管的瞬時推力 68 圖5- 14第三週期中不同延遲時間三管軸向的瞬時推力 69 圖5- 15三管不同延遲時間衝量與週期變化 70 圖5- 16三管、雙管推力分析 72 圖5- 17三管、雙管衝量分析 72 表目錄 表5- 1點火壓力模擬 57 表5- 2點火範圍模擬 58 表5- 3單管閥門開關模擬 60 表5- 4雙管不同延遲時間模擬 64 表5- 5三管不同延遲時間模擬 69 |
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