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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 周元昉(Yuan-Tang Chou) | |
dc.contributor.author | Yi-De Chen | en |
dc.contributor.author | 陳易德 | zh_TW |
dc.date.accessioned | 2021-06-15T05:42:07Z | - |
dc.date.available | 2020-08-19 | |
dc.date.copyright | 2010-08-25 | |
dc.date.issued | 2010 | |
dc.date.submitted | 2010-08-20 | |
dc.identifier.citation | [1]
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/46843 | - |
dc.description.abstract | 本研究利用Z-cut鈮酸鋰的對稱性,於其表面上製作一有三組等角度間隔之激發電極的霧化器,選擇對應於能量集中於上表面之場型的頻率激振,藉由鈮酸鋰的壓電性使表面形成位移場,利用表面的大位移使其上液體霧化為均勻微小液滴。在約15MHz至50MHz的範圍,此霧化器成功的激發出Sauter Mean Diameter約為5μm至8μm範圍的液滴。
本研究發現在兩組或三組電極激發於霧化器表面產生相互干涉的特殊型式位移場時,有利於減少霧化時產生較大顆粒的液滴,使霧化液滴的分佈更加集中。且利用三組指叉電極激振下產生之液滴會以垂直表面的方向飛出。 而比較霧化器在不同運作溫度時霧化液滴分佈後發現,霧化器於高溫運作時所產生的液滴其粒徑分佈有兩個峰值;而霧化器於較低運作溫度時霧化的液滴分佈只有一個峰值,因此推斷霧化器於高溫運作時除了表面激振所造成的霧化液滴外,同時伴隨了因熱效應所產生的水汽,所以造成量測結果有兩個峰值。 | zh_TW |
dc.description.abstract | Surface acoustic waves are excited by three pairs of inter-digital transducers (IDT), parallel with the X-axes of Z-cut lithium niobate individually, to atomize liquid on the device. The working frequency of the atomizers range between 15 MHz to 50 MHz. The Sauter Mean Diameter of the droplets are between 5μm to 8μm.
Because of the superposition of displacement field, atomization by two pairs or three pairs of IDT can reduce the generation of the bigger droplets and the droplets size distribution is more concentrated than the atomization by only one pair. The droplets leave the atomizer vertically when three pairs of IDT working simultaneously. The atomization droplets size distribution has two peaks when the atomizer operated at higher temperature, but only one peak at lower operation temperature. Therefore, the second peak of atomization may be the result of the vaporization by heat. | en |
dc.description.provenance | Made available in DSpace on 2021-06-15T05:42:07Z (GMT). No. of bitstreams: 1 ntu-99-R96522503-1.pdf: 8007770 bytes, checksum: 01a6c7489135341cb02c2df9dae4ad2b (MD5) Previous issue date: 2010 | en |
dc.description.tableofcontents | 目錄
口試委員會審定書 II 致謝 III 中文摘要 IV 英文摘要 錯誤! 尚未定義書籤。 目錄 V 表目錄 VIII 圖目錄 X 符號表 XV 第一章 緒論 1 1.1. 研究動機 1 1.2. 文獻回顧 1 1.3. 研究目的與內容簡介 4 第二章 壓電平板之二維穩態波傳理論 5 2.1. 準靜電態下之壓電統御方程式 5 2.2. 鈮酸鋰壓電材料簡介 8 2.3. 鈮酸鋰平面波波傳問題 8 2.4. 邊界條件之設定 13 2.5. 數值方法 17 2.6. 數值計算之結果與討論 19 第三章 鈮酸鋰霧化器之製作 21 3.1. 實驗儀器 21 3.2. 指叉電極之設計 22 3.3. 光罩繪製 23 3.4. 製作表面指叉電極之標準作業程序 24 3.4.1. 濺鍍電極 24 3.4.2. 黃光室製程 24 3.4.3. 電極蝕刻 26 3.5. 霧化器之電路配置 27 第四章 實驗及量測分析 28 4.1. 網路分析儀分析 28 4.2. 霧化觀測 30 4.3. 液滴粒徑量測 31 4.3.1. 單向指叉電極激振 31 4.3.2. 雙向指叉電極激振 32 4.3.3. 三向指叉電極激振 32 4.4. 霧化器溫度影響之探討 33 4.4.1. 霧化溫度及水汽粒徑量測 33 4.4.2. 霧化器表面溫度影響之比較 34 4.5. 結果討論 35 第五章 結論與建議 36 參考文獻 38 附表 40 附圖 50 | |
dc.language.iso | zh-TW | |
dc.title | 壓電板波霧化器雙峰現象之消除 | zh_TW |
dc.title | Eliminating the Phenomenon of Double Peaks of Piezoelectric Plate Wave Atomizer | en |
dc.type | Thesis | |
dc.date.schoolyear | 98-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 趙健祥(Chien-Hsiang Chao),尹慶中(Ching-Chung Yin),舒貽忠(Yi-Chung Shu) | |
dc.subject.keyword | 霧化器,指叉電極,鈮酸鋰,表面聲波, | zh_TW |
dc.subject.keyword | atomizer,IDT,lithium niobate,SAW, | en |
dc.relation.page | 90 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2010-08-20 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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