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研究生:林韋辰
研究生(外文):Lin, Wel-Chen
論文名稱:氫/空氣層流預混氣流於平行絕熱催化性白金壁面之實驗
論文名稱(外文):Experiments on Laminar Premixed Hydrogen/Air Flow over Parallel Adiabatic Catalytic Platinum Walls
指導教授:王訓忠
指導教授(外文):Wong, Shwin-Chung
學位類別:碩士
校院名稱:國立清華大學
系所名稱:動力機械工程學系
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:2004
畢業學年度:92
語文別:中文
論文頁數:36
中文關鍵詞:氫氣白金觸媒燃燒催化性壁面催化性側壁
外文關鍵詞:catalytic combustionhydrogenPtplatinumcatalytic wall
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本文對於氫/空氣預混層流燃氣與白金催化近似絕熱側壁之反應進行研究。白金催化性側壁為兩個平行相距1cm的電鍍白金鈦板,在兩平行板所圍成的區間兩側,用石英板隔絕外界空氣的影響並方便觀察。之後通入不同當量比(Φ=1.0、0.5、0.35、0.15)、進口流速(uin=0.2、0.27、0.43、0.59 m/s)等不同條件的預混燃氣,待其反應建立穩定的溫度場後,利用S-type的熱電偶量取燃氣流場及板面的溫度分佈。結果發現,白金對氫氣預混燃氣的催化效應在常溫常壓下就可進行,並且在相同的燃氣進口流速下,當量比越高則壁面及流場溫度分佈會越高;在相同的當量比時,燃氣的進口速度越快時溫度分佈較高;若以相同的氫氣體積流量來看,則整體燃氣流速慢(即當量比高)時溫度分佈較高。另外在低當量比時(Φ=0.15),不管進口流速如何,平均壁溫會較低,且壁溫會沿燃氣流向緩緩增加,而較高當量比時(Φ=1.0),平均壁溫較高,但壁溫也會沿燃氣流向增加,兩者原因有所不同,其詳細說明如內文所示。
另外當量比在0.35和0.5時,壁溫卻是在進口約10mm處最高,較下游部分的壁溫便會緩緩下降,這結果與文獻所提之結果相似。若比較不同燃氣條件的結果發現,對於氫氣之壁面催化反應當量點可能在燃氣當量比介於0.35和0.5之間,此結果與文獻中所提的表面反應當量點在Φ∼4之結果相符。
圖表目錄 ii
第一章 緒論 1
1.1 前言………………………………………… 1
1.2 文獻回顧…………………………………… 4
1.3 研究目的…………………………………… 8

第二章 實驗方法 10
2.1 實驗設備…………………………………… 10
2.2 實驗方法…………………………………… 12

第三章 結果與討論 14
3.1 壁面溫度…………………………………… 15
3.2 流場溫度…………………………………… 18

第四章 結論與未來工作 20
4.1 結論………………………………………… 20
4.2 未來工作…………………………………… 21

參考文獻 23
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