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研究生:劉書帆
研究生(外文):Liu, Sue-Fam
論文名稱:低推力聯胺推進器之設計參數探討
論文名稱(外文):A Study of the Design Parameters of Low-thrust Hydrazine Propulsion Thrusters
指導教授:袁曉峰袁曉峰引用關係
指導教授(外文):Tony Yuan
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
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:1996
畢業學年度:84
語文別:中文
論文頁數:58
中文關鍵詞:聯胺推進器設計參數
外文關鍵詞:Hydrazine Propulsion ThrustersDesign Parameters
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本論文以圓柱形觸媒床直徑 (15~25mm),觸煤床長度(10~42mm)及噴
嘴面積為參 數,探討低流量(4.54xE-3 kg/sec)聯胺(N2H4)與觸媒(
Shell 405)之間的反應現象. 實驗方法為採用多節式反應器,
換裝不同幾何外形之觸媒床,並藉由改變噴喉面 積來控制反應室壓力.
量測反應室溫度,壓力,與噴嘴出口壓力,以計算得推力與比衝值 並利用
氣相色層分析儀,分析生成物氮,氨的莫耳數進而求得聯胺分解反應中之氨
分解 率.
本研究採用軸向式推進劑噴嘴(Injector),在固定聯胺流量下,進行二種觸
媒填充 量(7.5g與11g)之實驗,反應室壓力控制於2.4~16.5 bar,共完
成24組實驗.由實驗數據 分析顯示:
(1)在固定觸媒填充量下,觸媒床長度愈長,其氨分解率愈大.
(2)相同之觸媒填充量下,改變填充直徑與長度,對反應室之壓力無顯著影
響; 但觸媒床長度加長,則溫度明顯下降.
(3)固定觸媒填充量下,壓力提昇會使氨分解率先降後昇,顯示在相對低壓
下, 壓力會抑制反應進行(化學反應控制);但壓力提昇至
相對高壓時,則會加 速反應進行(物理現象控制),當觸媒
床長度愈短,物理控制現象愈明顯.
The purpose of this thesis research is to study the
effects of cat- alytic bed dimensions on the hydrazine
decomposition in contact with shell 405 catalyst.
The hydrazine flow rate was kept constant (4.54xE-3 kg/sec). Two
ca- talytic bed loads were studied (7.5g and 11g)with 3
different cylindrical shapes. Temperature and pressure at
various positions in the reactor were monitored and the
products of the action were on-line analyzed by gas chr-
omatograph. The extent of ammonia dissociation (X) were
determined with the N2 and NH3 concentrations contained in
the reaction products. Propul- sive parameters were
calculated by assuming ideal nozzle design with the
temperature, pressure, and X values measured during experiments.
The res- ults show:
(1) With a constant catalytic bed load, increasing of the length
of the bed increases the extent of ammonia dissociation.
(2) Although pressures of the reactor are not affected by
changing the cyl- indrical shape of the catalytic bed with
constant bed loads, temperature is decreased for longer
bed-length shapes. (3)
Keeping constant catalyst, pressure suppresses reactions at
relative low pressure (chemical reaction controlled).
However, pressure accelerates reactions at relative high
pressure (physical controlled).
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