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研究生:吳庭耀
研究生(外文):Ting-Yau Wu
論文名稱:微機電製造之過氧化氫微推進器之研究
論文名稱(外文):Research on a MEMS-Based HTP Monopropellant Microthruster
指導教授:趙怡欽
指導教授(外文):Yei-Chin Chao
學位類別:碩士
校院名稱:國立成功大學
系所名稱:航空太空工程學系碩博士班
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:66
中文關鍵詞:微推進微機電過氧化氫
外文關鍵詞:HTPmicrothrusterMEMS
相關次數:
  • 被引用被引用:1
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  • 下載下載:27
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本論文探討自主研發微衛星用微機電(Micro Electronic Mechanical System, MEMS)製造之過氧化氫(Hydrogen Peroxide)微推進器,並對微推進器設計與測試等做初步研究,以期未來能完全自製完成一過氧化氫MEMS微推進系統,並經測試符合設計目標與需求。
搭載MEMS微推進器之微衛星可大量製造、降低成本與風險的優點,但過去對於化學推進的研究仍無法有效應用在此類MEMS推進器上。本研究中使用過氧化氫做單推進劑,屬於無毒對環境友善之綠色推進劑,在適用範圍具有高比衝值與能量密度高等優點。本文之MEMS(微機電)微推進器延續國家太空中心之初步設計,並以自製濃度90% 的高性能過氧化氫(High-Test Peroxide, HTP)微推進劑以及不同的加熱方式進行測試,以期改善期推進效率與操作性能,以達更能符合衛星姿態控制用微推進器之要求,推進器推力等級約10 mN。
本研究中針對特定過氧化氫觸媒床,著重探討系統因尺寸縮小造成的性能減退與觸媒床限制等因素,並分析一原型MEMS微推進其改善之設計。實驗設計過程包括理論分析估算推力及操作條件,配合推力實驗設備對量測微推力做修正,制定設計點參數與性能分析以及設計程序。本微推進器原型內銀觸媒床厚度0.1mm,尺寸1x9mm2。實驗結果使用90% 過氧化氫流量14 mg/s,加熱器19W,其分解效率可超過50%,分解溫度最高可達約600K,觸媒床與推進器內建壓可達3.8bar。地面測試量測推力得14mN,比衝值80s,符合設計目標與需求。
In this thesis, results of feasibility studies on an advanced MEMS-based (Micro-Electronic-Mechanical-System-based) HTP (High-Test Hydrogen Peroxide) microthruster system for attitude control of micro-spacecrafts are presented. For the prototype thruster of the current design, the operation and performance characteristics of the HTP microthruster system are carefully analyzed and tested .
The MEMS-based microthruster with its outstanding features of mass-productability, low cost and risk in manufacturing has attract intensive attention as an viable candidate of reactive control system (RCS) of a micro-satellite. In this research, the nontoxic and environmental benign HTP, also called the green propellant, is used as the monopropellant for the microthruster. HTP is of high energy and applicable specific impulse in the range of proposed operation for the present purpose. Based on the initial design of the MEMS HTP microthruster developed by NSPO (National Space Organization), the main objectives of this study are to test the improved performance characteristics and to develop the proper operation procedure by including optimized preheating process in order to reduce the ignition delay and light off time of the catalytic HTP reactive system and improve the conversion and propulsive efficiencies so that the current HTP microthruster system can satisfy the operational requirements of the RCS of a micro-satellite. This MEMS thruster is designed to the range of 10 milli-Newtons of thrust.
For the fixed catalyst bed, theoretical analysis and experimental tests are employed to determine parameters of the operation characteristics of the current HTP MEMS thruster such as conversion efficiency, the ignition delay, chamber pressure build-up, pressure and system oscillation. The prototype of the HTP MEMS-based microthruster coated with 0.1mm thickness of silver catalyst is developed and tested. The overall thruster weighs 0.5 g. Test results show that more than 50% C* efficiency and 54% thermal efficiency are achieved with 90% HTP at the flow rate of 14 mg/s. In the ground tests, the HTP microthruster generates 14 mN of thrust with a specific impulse bit of 80 seconds under atmospheric condition.
目錄
目錄 VIII
表目錄 IX
圖目錄 IX
符號 XI
第一章 簡介 13
1-1 研究動機 13
1-2 化學微推進系統與氧化劑過氧化氫的優點 14
1-3 微機電技術之微推進系統 16
第二章 過氧化氫微推進器理論分析 19
2-1 文獻回顧 19
2-2 尺度關係及基礎微推進限制 20
2-3 微推進器於微機電系統之最小尺寸評估 21
2-4 推進系統的理論分析 26
2-5 性能分析 29
第三章 實驗設備與實驗方法 32
3-1 過氧化氫來源 32
3-2 MEMS微推進器幾何設計與參數 32
3-3 系統與管路配置 33
3-4 壓力與溫度量測 35
3-5推力量測及誤差修正 35
3-6 訊號擷取與記錄 37
3-7 實驗方法 38
第四章 結果與討論 39
4-1觸媒床於不同加熱溫度及操作壓力下的分解反應 39
4-2 過氧化氫MEMS微推進器的觸媒床性能測試 42
4-3 啟動延遲時間 43
4-4 推力量測與性能分析 44
第五章 結論及未來工作 46
參考文獻 49

表目錄
表2-1、90%過氧化氫分解後熱力學性質 51
表3-1、過氧化氫MEMS微推進器幾何參數 51
表3-2、測試條件整理 52
表4-1、反應效率測試結果 53
圖目錄
圖1-1、過氧化氫濃度與絕熱分解溫度圖 54
圖1-2、過氧化氫濃度與密度圖 54
圖2-1、過氧化氫觸媒床控制體積與最小管徑分析 55
圖2-2、90%過氧化氫分解百分率與絕熱分解溫度關係圖 55
圖2-3、滯留時間與觸媒床管徑關係圖 56
圖2-4、推力、流量、燃燒室壓力估計與實驗圖 56
圖2-5、出口速度分布示意圖 57
圖2-6 出口中心速度分布 57
圖3-1、過氧化氫微推進器示意圖 58
圖3-2、過氧化氫微推進器 58
圖3-3、管路配置簡圖 59
圖3-4、管路配置圖 59
圖3-5、推力測試平台配置圖 60
圖3-6、推力與放大訊號關係圖 60
圖3-7、實驗訊號流程圖 61
圖4-1、觸媒床加熱19W反應圖 61
圖4-2、觸媒床加熱19W反應圖 62
圖4-3、觸媒床加熱16W反應圖 62
圖4-4、觸媒床加熱8W反應圖 63
圖4-5、觸媒床加熱14W震盪反應圖 63
圖4-6、觸媒床加熱19W觸媒床流場震盪 64
圖4-7、觸媒床加熱溫度16W觸媒床流場震盪 64
圖4-8、觸媒床加熱溫度與啟動延遲時間關係圖 65
圖4-9、觸媒床加熱瓦數與推力、壓力等關係圖 65
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