ストリップ理論を用いた準3次元LESによる水平軸風車周りの流れ場および性能の数値解析

抄録

A horizontal axis wind turbine has been developed to more sophisticated design. For the design, numerical calculations are developed, which like as blade element and momentum theory, vortex method, RANS and LES. The paper investigates the usability of hybrid method of strip theory and LES to design one. The wind turbine is designed based on MEL002 blade through standard blade element and momentum theory for the design conditions - upstream flow velocity 7m/s with tip speed ratio 2.5 and angles of attack 10 and 15 degrees. The hybrid LES calculates power coefficient and flow filed. As the results, the power coefficient by the present LES at design tip speed ratio 2.5 agrees with the experimental result. Furthermore, the separation region around the blade with angle of attack 10 degrees is smaller than one with 15 degrees. The flow simulation can show the reason that the power coefficient of 10 degrees is larger than one of 15 degrees in experiment.