近年來，風機之研究日趨重要。本論文使用商業套裝軟體FLUENT探討多顆直立葉片式垂直軸風機的配置對於風機陣列流場與噪音之影響
。使用SIMPLEC/QUICK之數值方法、SST k-ω與DES(Detached Eddy Simulation)分離渦漩模型在四邊形/三角形網格上求解非穩態二維不可壓縮納維史托克方程式(Navier-Stokes Equations)，並採用聲場模型FW-H方程式(Ffowcs Williams and Hawkings Equation)計算流場中之噪音分貝值。在不同風機陣列排列間距與位置下，對翼型為NACA0015之雙顆與四顆風機進行流場模擬計算。探討流場現象與風機之功率係數，並與相關文獻之實驗結果比較。在噪音研究方面，計算不同位置之聲音分貝值，以了解風機噪音值隨著距離不同之變動情形和最大與最小噪音下觀測點之方位。藉由本文之結果，風機陣列流場交互作用及阻塞效應是被探討。只要排列方式適當，便可使風機的功率係數獲得提升。

In the recent years, the study of wind turbine become important. In this study, the commerical software package FLUENT is used to investigate the effect of Straight-Bladed Vertical Axis Wind Turbines configuration on flow fields and on the noise around turbine arrays. The SIMPLEC/QUICK method, SST k-ω and Detached Eddy Simulation models are adopted to solve unsteady two dimensional incompressible Navier-Stokes Equations on the quadrilateral/triangular meshes. To calculte the decibel value of acoustic field, the Ffowcs Willams and Hawkings equation is introduced. Under the different turbine array arrangement, the flow fields around two and four wind turbines with NACA0015 blade are simulated, and the flow phenomena and power coefficient of wind turbines are obtained. The results are compared with the experimental results in the related literatures. In the study of noise, the sound decibels at various locations are computed. The variation of magnitude of sound pressure level with distance and direction of observation point with maximum and minimum values are observed. According to the present results, the flow interaction and blockage effects around the turbine arrays are investigated. With the turbine array being appropriately arranged, the power coefficient of the wind turbines can be increased.

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