Numerical Simulation of Tower Shadow Effect of Offshore Wind Tower
The wide structure,the big size of wind tower,and the obvious tower shadow effect are the important reasons for the offshore wind measurement error and calculated deviation of generating capacity in wind farm.The research of tower shadow effect of large offshore wind tower is few due to lack of offshore wind measurement data.In this case,CFD numerical simulation was used to study the tower shadow effect of offshore wind tower in this paper.The results show that there is a great difference of velocity change at the anemometer measurement points in different directions,the smaller the extension distance of wind measurement points,the greater the proportion of velocity change.Concerning the tower shadow effect of the internal structure of the wind tower,the influence of the transverse timber at each wind measuring point is greater than that of the inclined timber.About the tower sections at different heights,the tower shadow effect gradually stabilized after the extension length of 4m,and the variation law of the tower shadow effect with the extension length conforms to the Gaussian function.These research results are of guiding significance for the structural design of offshore wind tower and the correction of wind measurement data.
万方数据
维普
