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研究生:陳宏吉
研究生(外文):Chen Hung-Guy
論文名稱:襟翼控制對風力機性能影響的研究
論文名稱(外文):Study on the Wind Turbine Performance with Blade-Flap Control
指導教授:姜庭隆姜庭隆引用關係
指導教授(外文):Chiang, Ting-Lung
學位類別:碩士
校院名稱:國立屏東科技大學
系所名稱:機械工程系所
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:2008
畢業學年度:96
語文別:中文
論文頁數:75
中文關鍵詞:額定風速NACA0012動量理論葉片元素理論
外文關鍵詞:Rated wind speedNACA0012Momentum theoryBlade element theory
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本文探討葉片形狀之改變對風力機輸出功率的影響,主要的概念是在風速高於所設計的額定風速時,藉調整襟翼的角度來降低葉片的昇力,從而使扭力減少,使得葉片能夠維持設計的額定輸出而不因風速的升高造成過大的輸出功率而使發電機受損。使用的風力機模型其葉片是3葉式,翼型是NACA-0012翼剖面。所探討的參數為風速、襟翼的角度、襟翼的長度與弦長之比例。首先運用動量理論、葉片元素理論與貝茲極限理論以計算出葉片的各項規格,包含葉片各斷面半徑、弦長、節距角、以及輪轂半徑、輸出功率與功率係數,再運用商用軟體Gambit建構流場的網格,Fluent進行流場的解析,驗證此葉片的性能,並以不同襟翼角度分析其功率輸出,求得在高風速下要維持額定輸出應有的角度。
This article investigates the effects of blade-flap control of wind turbine performance. The concept is that for wind speed greater than the design rated speed, the blade-flap angle is increased to produce a different surface pressure distribution, which in turn reduces the torsional output, thereby maintaining rated power output and preventing damage to the generator due to excessive power output. The type of wind turbine modeled is a 3-blade design, with NACA-0012 airfoils. The parameters investigated are wind speed and flap angle. First, the momentum theory and blade element theory are used to calculate the blade rated angular velocity, the radius at each cross section, chord, relative velocity, pitch control, angle of attack, hub radius, tip speed, power output and power coefficient. The flowfield mesh is generated using the Gambit, and the flowfield solution is then achieved by using Fluent.
目錄
中文摘要...............................................I
英文摘要...............................................II
謝誌..................................................III
目錄..................................................IV
表目錄................................................VII
圖目錄................................................VIII
第1章 緒論............................................... 1
1.1前言................................................. 1
1.2文獻回顧............................................. 3
1.3研究目的與方法........................................ 5
第2章 風力發電簡介........................................ 6
2.1風力發電機歷史及使用現況................................6
2.1.1世界其他國家使用風能的情況.............................6
2.1.2 台灣使用風能的情況.................................. 7
2.2風力發電的原理........................................ 8
2.3風力發電機的效率與控制方法.............................. 9
2.4風力發電機組種類.......................................11
第3章 葉片空氣動力分析.....................................16
3.1貝茲理論............................................. 16
3.2葉片外型設計.......................................... 19
3.3旋轉效應............................................. 21
3.3.1 旋轉效應下之動量理論................................ 21
3.3.2 旋向誘導因子........................................21
3.4風力機葉片性能分析..................................... 22
3.5HAWT-OBPD程式設計.................................... 24
3.5.1 HAWT-OBPD程式之應用 ................................24
3.5.2 HAWT-BPA程式之應用................................. 24
第4章 數值分析........................................... 25
4.1數值模擬方法.......................................... 25
4.2統御方程式............................................ 25
4.3紊流模式............................................. 27
4.4壁面函數............................................. 28
4.5風力機之規格與邊界條件................................. 28
4.5.1 進、出口邊界條件................................... 29
4.5.2 壁面邊界.......................................... 29
4.5.3 移動參考座標....................................... 29
4.5.4 週期性邊界......................................... 29
4.6數值模擬設定參數...................................... 32
第5章 物理模型與網格建構.................................. 34
5.1物理模型設計概念...................................... 34
5.2風力機葉片設計參數..................................... 34
5.3風力機葉片模型建構..................................... 35
5.4流場尺寸設計.......................................... 37
5.5風力機表面網格建構..................................... 39
5.6移動參考座標網格架構................................... 40
5.7流場網格建構.......................................... 41
第6章 結果與討論......................................... 43
6.1數值實例............................................. 43
6.2數值模擬分析結果...................................... 43
6.3修正襟翼角度下數值模擬分析結果.......................... 44
6.3.1 短襟翼數值模擬各項數據.............................. 45
6.3.2 長襟翼數值模擬各項數據.............................. 47
6.4葉片空氣動力分析討論................................... 51
6.4.1 無襟翼控制下之流場探討.............................. 51
6.4.2短襟翼角度16°下之流場探討............................ 58
6.4.3長襟翼角度10°下之流場探討............................ 63
第7章 結論與未來展望...................................... 68
參考文獻.................................................69
附錄A....................................................71
附錄B....................................................73
作者簡介................................................ 75
參考文獻
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[18] 姜庭隆,2007,水平軸風力發電機最佳葉片初步設計程式集,屏東。
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