风力透平叶片振动时的三元非定常气动力

THREE DIMENSIONAL UNSTEADY AERODYNAMIC FORCE ON A VIBRATING WIND TURBINE BLADE

本文给出了确定风力透平叶片振动时的三元非定常气动力的方法,用核函数方法建立三元非定常气动力方程,用格林公式确定核函数,对于核函数的奇点作了有效处理,给出了处理关系式。对不同的工况进行了三元非定常气动力计算,与二元计算的对照表明,在所计算的范围内,非定常气动力的三元效应是不大的,可以应用相应的二元数值分析再沿截面积分(即准三元方法)来进行非定常气动力计算。

This paper presents a method for the determination of the unsteady aerodynamic forces on the vibrating blade of a wind turbine. Green's Theorem is used to derive a kernel function, and a treatment for singularities is developed and shown to be effective. Three dimensional aerodynamic loads under various conditions are analysed, and it is shown that their overall effect in comparison with the two dimensional analysis is in general small.