本文主要在設計發展一組具重量減輕、設計簡單、經濟價值高等特點的多扇葉阻力型之垂直軸風力發電（Multi-Blade, Vertical-Axis Wind Turbine; MVAWT），經數學模擬研究以及計算流體動力學分析，並與製造及實驗相結合來進行一個完整的風力發電機之研究發展。初步的設計過程中，當阻力型垂直軸風力發電運轉在迎風面（Upwind）時，數值與實測皆觀測到大量的負阻力產生。爲了減少迎風負阻力的影響，本文進行葉片翻轉機構的設計開發，接著按照IEC61400-12規格來規劃設計與製造安裝，一台小尺寸的多扇葉阻力型之垂直軸風力發電機及其性能測試平台，以進行風力發電功能與葉片翻轉機構的性能觀察。爲了將環境資訊與功率因數等資訊記錄到測試平臺，在此將發電機、加載系統（Loading System）、氣象桅杆系統(Environmental Mast)和實驗數據採集系統（DAQ）整合安裝作為一個發展風力發電機的性能測量系統。同時，把數據過濾處理和實驗結果分析整理，在LabView之架構建立成一個可靠的計算機程序；故這風力發電機系統可以運用自動化方式進行現場性能與觀察；此外，爲了取得足夠且準確的實驗數據，在程式中將引進統計概念以正確判斷執行數據處理過程。接下來，運用數學模型和計算流力模擬工作來進行分析估計，以在MVAWT操作過程整理取得其扭矩分佈和氣動力特性；經由集中於在葉片周圍的氣流相互作用之觀察，並結合葉片自動翻轉機構提供的一些現象，可歸納得知在迎風條件下減少阻力，能有效地獲得低風速中的操作之足夠扭力，而得以提昇風力機之轉速，進而取得較高之輸出功率。綜上所述，本論文結合MVAWT的實驗數據和數值模擬結果，可以奠定作為一種替代能源來源的整合R＆D研究之基礎。

　　In this study, the development of a light-weight, simple design, and high economic value multi-blade, drag-type, vertical-axis wind turbine (MVAWT) is carried out by combining the design, mathematical model, computational fluid dynamic, fabricating, and experimental means as a complete research scheme. At first, the design process is approached by the evidence of a huge amount of negative drag force during the upwind condition for the drag-type, vertical-axis wind turbine. An automatic blade-flipping mechanism design is developed with the purpose to minimize the drag force on the upwind condition. Followed by that, fabrication and installation of a full-scale small size MVAWT is conducted to observe the functional of blade flipping mechanism and the wind turbine performance. The complete experimental work follows the IEC61400-12 standard procedure for ensuring the accurate experimental data. Besides, an electric generator, off-line loading system, meteorology mast system, and real-time data acquisition system (DAQ) are installed as a sophisticated wind turbine measuring system, where all environmental information and power data from sensors and generator on the platform are recorded and transferred to the computer automatically. Afterwards, the data processing and in-depth analysis on the experimental outcomes are executed via the established computer program. Consequently, the on-site performance of wind turbine/generator system is attained in an automatic and systematic manner. Moreover, for providing sufficient data and its accuracy, statistic concept is enforced to judge whether the test data are appropriate for considering in the data-processing procedure.
Also, mathematic model and CFD simulation are conducted to estimate the torque distribution and flow characteristics during the operation of MVAWT. By focusing on the flow interaction around the blade, it can be concluded that the autonomous blade-flipping mechanism generate several important phenomenon, such as less drag force during the upwind condition, a sufficient thrust force to gain torque during the operation in low wind speed. In summary, combine with experimental data and numerical simulation results, this systematic and rigorous study on MVAWT is presented and can be served as a stepping stone for executing the R&D in harvesting wind energy as an alternative energy source.

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