結果顯示，利用動態網格技術和滑動網格技術的模擬下，動態網格技術所得到的數據較為趨近於試驗值。而在紊流模式為k-epsilon RNG model，使用動態網格技術模擬得到的結果中，My的誤差值較大，約為76.5%。但是在Fx的誤差值較小，約為1.08%。由此可知，以數值模擬分析風力發電機受力的情形，使用動態網格技術會比滑動網格技術更為理想。而實場預測的部份，將模擬的結果以相似性的原理縮小，最後再和縮尺模擬的結果比較。可以得到，Fx的誤差約為15%，而My的誤差約為13.5%。 This study investigated the structure behaviors of the wind turbine affected by the wind by using computational fluid dynamics (CFD) software. The base shear stress and moment of the wind turbine was compared for both results of numerical simulation and wind tunnel test with the same setting. Considering the dynamics similarity between the wind tunnel test and the field measurement, the wind tunnel test preformed with lower rotating speed of the wind turbine than the full scale wind turbine. If a realizable CFD model can be established for predicting the dynamic behaviors of the wind turbine. That will be very helpful for structure designer to get more information about the dynamic behaviors of the wind turbine during design and planning stage of the project.
Both of numerical models of the dynamic mesh and sliding mesh were selected for simulations. The results showed that the dynamic mesh model was better than sliding mesh model by comparing to the wind tunnel test results. In the case of the k-epsilon RNG turbulence model, the prediction of the bending moment affecting by acrosswind was more than 50%, and the prediction of the force affecting by acrosswind was less than 5%. The both simulation results of the small scale and full scale wind turbine obtained by CFD model. Comparisons of result showed that the error of Fx was about 15% and My was about 13.5%.
