【摘要】 动态来流条件下,水平轴风力机的功率输出可增加30%～50%。本文通过量纲分析,确定影响水平轴风力机翼型动态来流条件下气动特性的主要参数为特征频率f_r和雷诺数Re。运用CFD方法对NREL S825翼型在不同f_r数和Re数条件下,进行了气动特性的对比。结果表明在动态来流条件下,低Re数对翼型特性影响较小,而f_r数是影响翼型性能的关键。更多还原

【Abstract】 The power output of HAWT can be increased by 30% to 50% in dynamic inflow.With the dimensional analysis,the reduce frequency f_r and Reynolds Number are considered as the main factors determining the performance of the airfoil of HAWT in this condition.The performances of NREL S825 airfoil for different F_r and Re numbers are simulated and compared.Results show f_r is the dominating factor influencing the performance of airfoil in dynamic inflow,while Re Number impacts less on it.更多还原