研究生: |
楊士弘 Yang Shih-Hung |
---|---|
論文名稱: |
微型噴嘴噴霧特性與幾何參數研究 Laser Diagnosis and Goemetry Parameter Study on Micro-Atomizers |
指導教授: |
楊鏡堂
J. T. Yang |
口試委員: | |
學位類別: |
碩士 Master |
系所名稱: |
工學院 - 動力機械工程學系 Department of Power Mechanical Engineering |
論文出版年: | 2002 |
畢業學年度: | 90 |
語文別: | 中文 |
論文頁數: | 196 |
中文關鍵詞: | 微製程 、噴嘴 、霧化 |
外文關鍵詞: | Micro-machining, atomizer, spray, LIGA |
相關次數: | 點閱:1 下載:0 |
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摘 要
本論文主旨以實驗方法討論應用微機電製造技術所製成之微噴嘴的霧化特性,並探討微噴嘴的幾何形狀以及尺寸,對霧化效果的影響。實驗分析內容包括定性的噴霧流場觀測與定量的噴霧特性量測,定性的噴霧流場觀測以雷射切面來觀測流場的動態變化,定量的噴霧特型量測利用相位都卜勒粒徑分析儀(PDPA)量測噴霧粒徑大小、速度分布等定量之數據。
由於噴霧流場結構主要受噴嘴內部流道的幾何尺度參數所影響,所以針對直型流道與弧形流道兩種不同流道形狀的微噴嘴、微噴嘴本體厚度的不同,以及不同大小的噴孔等不同的幾何參數,來進行量測與分析。實驗結果發現,弧形流道會更多的渦旋效應,所以會有比直型流道有更好的物化效果。微噴嘴內部渦旋腔長度/直徑比最適當的設計範圍在0.5~2.75,太大摩擦損耗會增加,太小則無法使液體有足夠的渦旋效應,微噴嘴噴孔長度/直徑比則是因為液體在通過此區時會有很大的摩擦損耗,所以希望此比值愈小愈好。在論文結論中並建立噴嘴的幾何尺寸對噴嘴霧化特性影響的模型,以進一步找出噴嘴內部最佳幾何形狀之設計。期望藉由實驗所得之驗證來提供未來新型微噴嘴設計的參考。
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