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    題名: Influence of the Gurney flap on aerodynamic force revolution of a vertical wind turbine
    其他題名: Gurney flap對垂直軸風力機氣動力之影響
    作者: 鄭紹儀;Cheng, Shao-Yi
    貢獻者: 淡江大學航空太空工程學系碩士班
    牛仰堯
    關鍵詞: Aerodynamics;CFD;Force decomposition;Gurney flap;VAWT;vortex;垂直式風力機;計算流力
    日期: 2017
    上傳時間: 2018-08-03 15:03:14 (UTC+8)
    摘要: 隨著全世界科技的進步,人口的上升,能源耗盡成為我們重視的議題。因此取之不盡用之不竭的再生能源成為大家近期所研究的對象,其中風力發電是一種不錯的再生能源。風力發電可分為水平式與垂直式兩種風力機,吾人在此研究中所探討的是單片翼型為NACA4412之葉片的垂直式風力機進行模擬。進而加裝Gurney flap,進行探討加裝置在模擬過後的氣動力分析是否能改善其葉片轉動的效能。在數值分析中,使用二階精確浸入邊界法來了解Gurney如何影響升力垂直軸風力發電機。我們模擬測試使用流速為U = 1 m / s的流場條件。假設十萬雷諾數的情況下,在紊流中選擇人工可壓縮法來求解不可壓縮的Navier-Stokes方程。
    With the growth of economy and development of industry throughout the world, the energy consumption is great needs. Instead of traditional fossil fuels, the renewable energy has gradually attracted in practical applications or academic studies. One of the widely used renewable energy is the wind. In this study, the aerodynamic characteristics of a vertical-axis wind turbine installing with high-lift devices, such as the Gurney flap at the trailing edge is investigated. In numerical analysis, second-order accurate immersed boundary method is used to understand how the Gurney flap influences the force decomposition of the lift vertical-axis wind turbine. The test cases use the flow conditions of the incoming flow velocity as U =1 m/s. The artificial compressibility is chosen in the evaluation of turbulence effects in solving the incompressible Navier-Stokes equations under the assumption of one millions of Reynolds number.
    顯示於類別:[航空太空工程學系暨研究所] 學位論文

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