王興華臺灣大學:機械工程學研究所傅家彥Fu, Chia-YanChia-YanFu2010-06-302018-06-282010-06-302018-06-282009U0001-0608200920282500http://ntur.lib.ntu.edu.tw//handle/246246/187177本研究主要為延續Clanet【23】之研究，檢視典式理論在微小尺寸之適用性，本文研究方法以實驗結果與理論作比較，探討在室溫室壓下，微小純水液柱碰撞固體平面後所形成的液頁流場特性，試著從其所顯示的各式物理現象，推測出可能的物理原則，在Clanet【23】研究基礎下，改變外力方向和流體性質與其區別並探討。探討主題主要可分成三個部分:1)微型尺寸與理論之比較2)改變外力方向所造成之影響3)改變流體性質對流場之影響果顯示(1) 本文使用之微型尺寸與理論對照符合；(2)重力對水鐘成型條件有重要聯性；(3)改變流體性質後，水鐘輪廓有顯著的改變。This investigation continues Clanet’s study 【23】to see whether the classic theory can be used in micro scale water jets. The work is an experimental investigation of fluidheets flow generated by laminar water jets impacting solid discs in atmosphere environment. The main work can be divided into three parts:1) Whether classic theory can be used in micro scale water jets2)The effect of gravity on the water bells3)The effect of surface tensionhe results reveal that (1)classic theory can be used in micro scale water jets. (2)theffect of gravity can not be negative in the formation of water bells. (3)the effect ofurface tension is a important characteristic in the shapes of water bells口試委員會審定書 ....................................................................................................... I謝 .............................................................................................................................. II文摘要 .................................................................................................................... IIIbstract ....................................................................................................................... IV一章 緒論 ................................................................................................................ 1-1 前言 ................................................................................................................. 1-2 文獻回顧 ......................................................................................................... 1-3 研究動機與目的 ............................................................................................. 4二章 基本原理 ........................................................................................................ 5-1 液頁流場原理 ................................................................................................. 5-1.1 液頁形成方式 ...................................................................................... 5-1.2 霧化原理 .............................................................................................. 6-1.3 液頁形成原理 ...................................................................................... 6-1.4 液頁流動模式 ...................................................................................... 6-1.5 液頁碎裂機制 ...................................................................................... 7-2 水鐘流場之液頁輪廓 ..................................................................................... 9三章 實驗設備與方法 .......................................................................................... 14-1 實驗設備 ....................................................................................................... 14-2 實驗方法 ....................................................................................................... 19四章 結果與討論 .................................................................................................. 24-1 垂直撞擊固體表面情況下之特性探討 ....................................................... 25-1.1 水鐘之成型 ........................................................................................ 25-1.2 射出角度之探討 ................................................................................ 26-1.3 水鐘輪廓 ............................................................................................ 28-2 與重力場反向之碰撞特性 ........................................................................... 29-2.1 重力對水鐘成型之影響 .................................................................... 29-2.2 重力對射出角度之影響 .................................................................... 30-2.3 重力對水鐘輪廓之影響 .................................................................... 30-3 改變流體性質之影響 ................................................................................... 31-3.1 表面張力對成型之影響 .................................................................... 31-3.2 表面張力對射出角度之影響 ............................................................ 32-3.3 表面張力對輪廓之影響 .................................................................... 33-4 霧化現象之探討 ........................................................................................... 33五章 結論與未來展望 .......................................................................................... 35amp;#63851;考文獻 .................................................................................................................... 36表 ............................................................................................................................ 3921146168 bytesapplication/pdfen-US水鐘液頁碰撞fluid sheetsimpactwater bellsthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/187177/1/ntu-98-R96522312-1.pdf