研究生: |
劉敦仁 |
---|---|
論文名稱: |
多級式EHD散熱技術之研究 Heat Transfer Technology of Multiple Staged EHD |
指導教授: | 許文震 |
口試委員: |
王訓中
王啟川 |
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: | 2013 |
畢業學年度: | 101 |
語文別: | 中文 |
論文頁數: | 80 |
中文關鍵詞: | 電液動力學 、EHD 、雙級式EHD幫浦 、電極遮蔽 |
相關次數: | 點閱:73 下載:0 |
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本實驗主要是討論利用電液動力學(electrohydrodynamics, EHD)之技術來提升散熱能力。其原理為在一排針狀電極上通高壓電,使電極附近的空氣解離進而產生離子風,以達到增強散熱能力之目的。在本實驗中設計雙級式的EHD幫浦來提升單級式幫浦的平均風量及風速。希望藉由再串接一排針狀電極的方式,跟單級時進行平均風速和風量的比較觀察其提升效果如何。透過實驗結果可知,在單級幫浦時網子的選擇是非常重要的,網子過密和過疏對幫浦平均風速都是不太好的。且在單級幫浦下以在七根電極、間距10mm和接地網為12目線徑0.35時平均風速最大可達1.2487(m/s)。在雙級幫浦時,採用四種不同電極排列和間距的改變來觀察提升的效果。由實驗結果知在間距10mm平均速度和風量方面以七-五雙級>五-七雙級>七-七雙級>五-五雙級,在間距20mm七-五雙級>五-七雙級約等於七-七雙級>五-五雙級,在間距30mm七-五雙級>五-七雙級>七-七雙級約等於五-五雙級,而整體而言是在間距20mm下提升效果最好。較好的電極排列為七-五雙級與五-七電極和前級電極遮蔽效果有關。
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