由於一般的Savonius轉子輸出功率偏低，較少用於風力發電系統中，但其結構簡單與成本低廉，所以仍值得開發。本文運用繪圖軟體來建構所需的二維與三維模擬轉子與流場，使用計算流體動力學模擬軟體(CFD)來進行模擬實驗，分析在相同截面積與風速下，三種不同結構比例的Savonius轉子轉矩與輸出功率，藉以探討最佳功率係數 的型態，其中瘦高型轉子的輸出功率與 最佳，而寬矮型轉子則有最大轉矩。比較Savonius轉子之上下蓋對效率的影響，發現有上下蓋之Savonius轉子效率與轉矩都大於無上下蓋Savonius的轉子。由於二維轉子的模擬無法考慮轉子高度，比較二維與三維轉子的數值模擬，顯示二維轉子的轉矩較三維轉子低許多。

Savonius rotor is seldom applied in wind power generation system due to its lower output power. But the rotor with simple structure and low manufacturing cost is still worth to be studied more. Method of computational fluid dynamics simulation is applied to investigate the optimum output power, torque and power coefficient ( ) for three different configuration of Savonius rotors with the same cross section area and upstream wind speed. The tall and thin wind turbine is found to have the maximum output power and . The short and wide wind turbine has the maximum torque but the minimum . The influence caused by the circular covers at two ends of rotor was simulated and analyzed. It reveals that both the torque and power coefficient for Savonius rotor with covers are larger than that without covers. Comparison between simulation results of two- and three-dimensional models shows that the two-dimensional rotor is found to have lower torque and output power due to the height of rotor is unable to be taken into account.

目錄
中文摘要…………………………………………………………………………………… i
英文摘要…………………………………………………………………………………… ii
致謝………………………………………………………………………………………… iii
目錄………………………………………………………………………………………… iv
表目錄……………………………………………………………………………………… vii
圖目錄……………………………………………………………………………………… viii
第一章 緒論……………………………………………………………………………… 1
1.1 前言…………………………………………………………………………… 1
1.2 研究背景與動機…………………………………………………………… 3
1.3 文獻回顧與研究目的……………………………………………………… 4
1.4 本文綱要…………………………………………………………………………………………… 5
第二章 風力發電機特性與架構………………………………………………………… 6
2.1 簡介………………………………………………………………………………………………… 6
2.2 風的形成與特性…………………………………………………………………………………7
2.2.1 風的形成………………………………………………………………… 7
2.2.2 風的特性………………………………………………………………… 8
2.3 風力機發電機原理與特性…………………………………………………… 8
2.3.1 風力發電機種類……………………………………………………… 9
2.3.2 水平軸風力發電機……………………………………………………… 10
2.3.3 垂直軸風力發電機……………………………………………………… 11
2.4 風力發電效率………………………………………………………………… 13
第三章 分析工具與熱流模擬軟體……………………………………………………… 16
3.1 前言…………………………………………………………………………… 16
3.2 軟體工具……………………………………………………………………… 17
3.2.1 SolidWorks介紹…………………………………………………………… 17
3.2.2 Autodesk Simulation CFD介紹…………………………………… 17
3.2.2.1 前端處理功能………………………………………………………… 18
3.2.2.2 求解器……………………………………………………………… 19
3.2.2.3 層流與紊流模式……………………………………………………… 19
3.2.3 後端處理器功能………………………………………………………… 20
3.3 Origin8軟體介紹……………………………………………………………… 20
第四章 Savonius轉子模型數值模擬設定……………………………………………… 21
4.1 以SolidWorks繪製Savonius轉子模型…………………………………… 22
4.1.1 建構二維Savonius轉子模型………………………………………… 22
4.1.2 建構三維Savonius轉子模型…………………………………………… 26
4.2 模擬條件設定………………………………………………………………… 29
4.2.1匯入轉子模型至模擬軟體CFD………………………………………… 29
4.2.2 Savonius轉子之材料設定……………………………………………… 29
4.2.3轉子定轉速設定………………………………………………………… 30
4.2.4流場空間之邊界條件…………………………………………………… 31
4.2.5轉子模型與流場空間之網格設定……………………………………… 32
4.2.6系統之紊流模式及求解控制設定……………………………………… 33
4.3 Savonius轉子系統模擬流程圖……………………………………………… 36
第五章 實驗結果與分析………………………………………………………………… 37
5.1 轉子無負載之模擬分析……………………………………………………………………… 37
5.2 轉子有負載之模擬分析…………………………………………………………………………40
5.3 轉子輸出功率與 之分析………………………………………………………………………44
5.4 角速度和TSR與 之分析………………………………………………………………………46
5.5 Savonius轉子有無上下蓋之分析……………………………………………. 47
5.6 二維與三維比較……………………………………………………………… 50
第六章 結論與未來研究動向……………………………………………………………… 52
6.1結論…………………………………………………………………………… 52
6.2未來研究方向………………………………………………………………… 53
參考文獻…………………………………………………………………………………… 54
簡歷………………………………………………………………………………………… 55

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