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研究生:于仁斌
研究生(外文):Jen-Pin YU
論文名稱:氣泡式噴墨頭液滴形成之數值模擬
論文名稱(外文):Numerical Simulation of droplets formation from Bubble Inkjet
指導教授:許立傑
指導教授(外文):Li-Chieh Hsu
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:機械工程系碩士班
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:2007
畢業學年度:95
語文別:中文
論文頁數:107
中文關鍵詞:液滴噴墨氣泡
外文關鍵詞:bubbleinkjetdroplet
相關次數:
  • 被引用被引用:5
  • 點閱點閱:237
  • 評分評分:
  • 下載下載:36
  • 收藏至我的研究室書目清單書目收藏:0
印表機的技術日新月異而經過多年的研究發展,噴墨印表機已大量使用在個人、家庭以及團體,成為每台電腦必備的週邊設備。本文則針對熱泡式噴墨系統的噴嘴形狀、噴嘴直徑、噴墨腔體體積及噴墨之黏滯性對噴墨液滴行為之影響作一系列的分析,包括噴墨腔體內之氣泡膨脹及收縮、噴墨液滴之粒徑、運動中液滴之形狀變化、液滴破裂、衛星液滴等模擬,藉此找出噴墨液滴行為之重要控制參數以當作新型噴墨系統設計的參考數據。 由於模擬軟體之限制無法計算模擬出熱泡式噴墨列印技術中的真實相變化情形。因此微氣泡之半徑變化率可由Rayleigh equation,配合Asai 建議之氣泡內壓力關係式發展出簡易的模擬氣泡成長與收縮的方法。
Although, inkjet technology has been largely improved in past decade and result in tremendous impact on our daily life, the thermal bubble formation and deformation of inkjet droplet during its flight always cause our research interest. In this paper, we use commercial package to simulate the thermal bubble formation inside the ink chamber. The growing rate of radius of bubble is obeyed Rayleigh equation and Asai’s experiment data to get a pseudo-phase change process due to the software limitation. The various geometry of inkjet nozzle, nozzle diameter, size of ink chamber and viscosity of ink are simulated to observe the influence on inkjet droplet behavior including, droplet diameter, break-up and satellite droplets as further design parameters for a new inkjet head.
中文摘要-------------------------------------------------------------------v
英文摘要------------------------------------------------------------------iv
致謝-------------------------------------------------------------------------v
目錄------------------------------------------------------------------------vi
圖目錄--------------------------------------------------------------------viii
符號說明------------------------------------------------------------------ xi
第一章 序論
1.1 研究背景---------------------------------------------1
1.2 文獻回顧---------------------------------------------2
1.3 微液滴噴墨技術的應用----------------------------6
1.4 研究目的---------------------------------------------7
1.5 本文架構---------------------------------------------8
第二章 數值方法
2.1 噴墨列印技術的種類------------------------------10
2.1.1 連續式噴墨列印技術------------------------10
2.1.2 脈衝式噴墨列印技術------------------------11
1. 熱泡式
2. 壓電式
2.1.3 熱泡式與壓電式之比較---------------------15
2.1 數值方法
2.2.1 統御方程式-----------------------------------17
2.2.2 有限體積法(Finite Volume)-----------------19
2.2.3 有限差分方程式(Finite difference
equation)---------------------------------------22
2.2.4 流體體積法(VOF)------------------------22
2.2.5 SIMPLEC 演算法-----------------------------23
第三章 物理模型分析
3.1 噴嘴構造分析--------------------------------------25
3.2 邊界條件說明介紹--------------------------------26
3.3 液滴受力分析--------------------------------------27
vii
第四章 結果與討論
4.1 網格分析--------------------------------------------28
4.1.1 網格數的分析---------------------------------28
4.1.2 網格疏密度的分析---------------------------29
4.2 氣泡半徑成長率的分析---------------------------31
4.2.1 氣泡膨脹收縮機制--------------------------31
4.2.2 氣泡膨脹收縮結果分析---------------------32
4.3 噴嘴構型分析--------------------------------------33
4.4 不同噴嘴直徑的分析------------------------------34
4.5 不同腔體高度的分析------------------------------35
4.5.1 腔體高度對液滴速度之影響---------------35
4.5.2 腔體高度對衛星液滴之影響---------------36
4.5.3 腔體高度對液滴形狀之影響---------------37
4.6 不同黏滯係數時液滴的運動分析---------------38
第五章 結論與未來展望---------------------------------------------40
參考文獻-----------------------------------------------------43
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士論 文, 2004
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