臺灣博碩士論文加值系統

本研究以實驗與數值模擬方法，探討三葉小型水平軸風力發電機在不同風速下之輸出功率，葉片翼型選用NACA 4415，首先應用葉片元素動量理論設計葉片幾何實體模型，接著以射出成型製作風機葉片，實驗量測方面，本研究開發一套風力發電多功能量測系統，量測在不同入口風速下風力機電壓、電流與輸出功率，實驗結果顯示藉由改變葉片安裝角度可以有效改善風力機之輸出功率，當入口風速11m/s與安裝角調整3o時可獲得最佳輸出功率，接著應用計算流體力學進行風力機流場分析，量測風力發電機功率，模擬結果並與實驗量測結果比較，以驗證本研究所提出葉片設計理論與實驗分析之可行性。

In this study, the power generation of the small horizontal-axis wind turbine with 3 blades was investigated under different inlet wind velocity. The NACA4415 wing section was chosen as the base geometry for constructing the blade of the HAWT. Firstly, the geometry of the blade was designed based on the element momentum method (BEM). Then the shape of the blade was machined by injection-molding technology. For experimental measurement, a multi-function wind turbine measurement system was developed to measure the voltage, current and power generation of the HAWT with different inlet wind velocity. The experimental results show that the power efficiency of HAWT can be improved by changing the blade pitch angle. The maximum power was obtained for inlet wind velocity of 11m/s and blade pitch angle of 3o. The computational fluid dynamics (CFD) was employed to investigate the flow behaviors and power generation of HAWT. The simulation results were compared with those of experiment to conform the reliability of theoretical analysis and experimental measurement.

摘要...........................................I
ABSTRACT......................................II
目錄..........................................IV
表目錄........................................VI
圖目錄.......................................VII
符號表.........................................X
第一章 緒論..................................1
1-1 前言..................................1
1-2 文獻回顧...............................4
1-3 研究目的與方法..........................7
第二章 風能理論與葉片設計 .....................11
2-1 風能動量理論...........................11
2-2 葉片元素動量理論.......................14
2-3 葉片設計規格...........................19
2-3-1 葉片半徑設計...........................19
2-3-2 翼型斷面選擇...........................19
2-3-3 繪製三維外型...........................20
第三章 模擬分析與實驗設計......................34
3-1 數值模擬方法...........................34
3-1-1 統御方程式.............................35
3-1-2 雷諾平均法.............................35
3-1-3 κ-ε紊流模型方程式 ......................36
3-1-4 壁面函數法.............................38
3-1-5 數值模擬模型建構........................41
3-1-6 網格建立...............................41
3-1-7 邊界條件設定............................42
3-1-8 求解散離方法............................42
3-2 實驗設備與實驗方法 ......................43
第四章 結果與討論.............................54
4-1 風力發電機葉片製作 ......................54
4-2 風力發電機輸出功率量測...................55
4-2-1 葉片安裝角對功率之影響...................56
4-3 數值模擬結果............................58
第五章 結論與未來展望..........................83
參考文獻 ......................................85

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