本研究主要是探討使用無動件的EHD (electrohydrodynamics) 技術來改善自然對流下的散熱能力，將電極放置在鰭片外，外加直流高壓電場，施加電壓0∼18kV的實驗範圍內，探討電極形狀如何設計才是一根良好的電極，在本實驗中，電極形狀為尖形時，電荷密度集中導致庫侖力較大，產生平均風速高達1.4m/s，熱對流係數可提升為自然對流係數的2.6倍，同時初始電壓降低許多，火花電壓也隨之下降。若電極形狀為圓形時，熱傳增強效果均不如平面電極。另外也探討溼度對熱傳性能的影響，在低相對溼度為45%的情狀之下，熱對流係數可提升為自然對流係數的3.2倍，其中溼度對負電暈影響比正電暈大，本研究也探討電極極性、電極與鳍片之間的距離、電極直徑、電極數目、排列等等因素對EHD散熱效果的影響。也探討初始電壓、火花電壓之間的操縱範圍電壓的影響因素。實驗結果指出，在負電暈、電極距離大、電極直徑小、電極形狀為尖形、電極數目多、低溼度的情狀下對於熱傳效果更佳。

摘要
Abstract
誌謝
目錄
圖目錄
第一章 緒論
1-1 前言
1-2 文獻回顧
1-2-1 電暈現象之文獻回顧
1-2-2 EHD散熱應用之文獻回顧
1-2-3 EHD溼度影響之文獻回顧
第二章 原理簡介
2-1 概論
2-2 EHD原理簡介
2-3電暈現象
2-3-1 離子生成
2-3-2 正電暈的離子運動行為
2-3-3 負電暈的離子運動行為
2-3-4 粒子間的碰撞行為
2-4影響火花電壓的因素
2-5 氣壓、溫度、溼度對氣體絕緣破壞的影響
第三章 實驗設備及方法
3-1 實驗設備
3-1.1實驗測試系統
3-1.2 熱電偶校正
3-1.3 加熱片校正
3-1.4 濕度計校正
3-1.5 自然對流校正
3-2 實驗與分析方法
3-2.1 自然對流熱傳實驗與分析
3-2.2 EHD實驗與分析
第四章 實驗結果與討論
4-1 電場極性對熱傳性能的影響
4-2電極距離對熱傳性能的影響
4-3電極直徑對熱傳性能的影響
4-4電極幾何形狀對熱傳性能的影響
4-5雙根電極與電極間距對熱傳性能的影響
4-6相對濕度對熱傳性能的影響
4-7 初始電壓與火花電壓的影響
第五章 結論與未來發展
5-1 結論
5-2 未來發展方向
第六章 參考文獻

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