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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/74681

    Title: 小型風車流場之數值計算與實驗研究
    Other Titles: The numerical and experimental study of small wind turbines
    Authors: 林品賢;Lin, Pin-Hsien
    Contributors: 淡江大學航空太空工程學系碩士班
    陳慶祥;Chen, Ching-Shung
    Keywords: 小型風車;數值模擬與實驗;Small wind turbines;The simulation of numerical and experiment;FLUENT
    Date: 2011
    Issue Date: 2011-12-28 19:18:05 (UTC+8)
    Abstract: 本研究使用計算流體力學軟體FLUENT模擬小型風車流場,分析其空氣動力特性,並將模擬結果與風洞中實際之小型風車實驗測試所得之實驗值進行比對,主要目的為驗證數值模擬結果應用於實際風車之效能分析可行性。
    In this study, computational fluid dynamics software FLUENT was used to simulate the flow field of small wind turbines. To explore the feasibility of using FLUENT to design small wind turbines, a series of tests were also conducted in a small wind tunnel.
    Two airfoil shapes, NACA2415 and NACA4415, were used as the blade shapes of the small wind turbines. We first used the computer aided design software, Pro Engineer, to draw the configuration of the wind turbines. A line, surface, and body approach was used in the grid generator, GAMBIT, to generate unstructured grids for the wind turbines. FLUENT was then used to simulate two- and three-blade wind turbines. The calculated power coefficients were compared with the experimental data to validate the numerical results.
    The research showed that grid density has decisive effects on the accuracy of the numerical solutions. We used a two-dimensional wing profile as an example and demonstrated that a very high grid density is needed near the airfoil surface if accurate results are to be obtained. The errors between calculated and experimental power coefficients were larger for two-blade wind turbines. But the trend of the curves is similar. The corresponding errors are much smaller for three-blade wind turbines. Finally, we feel that numerical simulation can be an efficient tool in designing small wind turbines but more validations are needed before it becomes a reality.
    Appears in Collections:[Graduate Institute & Department of Aerospace Engineering] Thesis

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