A study of applications of CFD for the wind turbine structures affected by wind

• Main Authors: Tzung-Shian Liou, 劉宗憲
• Other Authors: Cheng-Hsin Chang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/28431549194351578291

碩士 === 淡江大學 === 土木工程學系碩士班 === 98 === 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%.