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研究生: 王政傑
Wang, Jheng-Jie
論文名稱: 開放式低速風洞校驗及交叉軸式風力發電機空氣動力性能研究
Calibrations of an Open-Circuit Low Speed Wind Tunnel and the Study of Aerodynamic Performance of a Cross-Axis Wind Turbine
指導教授: 王偉成
Wang, Wei-Cheng
學位類別: 碩士
Master
系所名稱: 工學院 - 航空太空工程學系
Department of Aeronautics & Astronautics
論文出版年: 2017
畢業學年度: 105
語文別: 英文
論文頁數: 54
中文關鍵詞: 風能風洞試驗空氣動力學交叉軸風力發電機垂直軸風力發電機功率係數
外文關鍵詞: Wind energy, Wind tunnel experiment, Aerodynamic, Cross-Axis Wind Turbine (CAWT), Vertical Axis Wind Turbine (VAWT), Power coefficient
相關次數: 點閱:135下載:7
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  • 為了因應都市型的風場狀況,本研究通過校準的開放式低速風洞對新型交叉軸風力發電機(CAWT)進行量測,其性能結合水平和垂直軸風力發電機(HAWT和VAWT)的優勢所組成。首先,為了確保風洞的流場品質,根據IEC61400-12的規範,在風洞測試段進行流場不均勻度,紊流強度及壓力梯度的校準。此外,在各種雷諾數下,CAWT在有和沒有人工紊流發生器的情況下進行穩定/不穩定風況下靜態和動態性能的測試檢查,並且考慮了風洞內的堵塞效應。結果表明,靜態和動態性能均隨著加裝人工紊流發生器而提高。另外,根據風力發電機的功率性能表現進行CAWT投資回收期的經濟評估計算。

    For the purpose of meeting the wind field in the urban area, the performance of a newly invented cross-axis wind turbine (CAWT), which consists of the advantages of horizontal and vertical axis wind turbines (HAWTs and VAWTs), was examined in a calibrated open-circuit low speed wind tunnel in this study. Firstly, to ensure the quality of the wind tunnel, the calibration in accordance with the flow non-uniformity, turbulent intensity and pressure gradient along the test section was conducted within the wind tunnel, based on the IEC61400-12 standard. Furthermore, the CAWT were tested with and without the artificial turbulence generator, for examining the static and dynamic performances within a steady/unsteady wind conditions at various Reynolds numbers, and the blockage inside the wind tunnel was additionally taken into account. The results show that both the static and dynamic performances were improved with the addition of turbulence generator. Moreover, based on the power performance of wind turbine, the payback period of the CAWT was calculated according to the economic evaluation of the wind turbine.

    ABSTRACT III 中文摘要 IV ACKNOWLEDGEMENT V CONTENT VI LIST OF TABLES VIII LIST OF FIGURES IX NOMENCLATURE X Chapter Ⅰ 1 Introduction 1 Chapter Ⅱ 10 Experimental 10 2.1 Calibration of the wind tunnel 10 2.1.1 Measurement of flow non-uniformity 11 2.1.2 Measurement of turbulence intensity 13 2.1.3 Measurement of pressure gradient 14 2.2 Examination of the performance of CAWT 15 2.2.1 Experimental setup 15 2.2.2 Grid-generated turbulent flow 18 2.2.3 Measurements of aerodynamic characteristics 20 2.2.4 Blockage effect and uncertainty analysis 22 Chapter Ⅲ 23 Results and Discussion 23 3.1 Wind tunnel calibration 23 3.1.1 Measurement of flow non-uniformity 23 3.1.2 Measurement of turbulence intensity 29 3.1.3 Measurement of the pressure gradient 32 3.2 Performance analysis of CAWT 34 3.2.1 Free-run condition test 34 3.2.2 Power performance measurement 39 3.3 Economic aspects 44 Chapter Ⅳ 46 Conclusion 46 Reference 48

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