表面粗糙度对风力机翼型性能的影响

AERODYNAMIC PERFORMANCE INFLUENCE WITH ROUGHNESS ON WIND TURBINE AIRFOIL SURFACE

讨论了风力机专用叶片上局部增加表面粗糙度,在不同分布位置、不同当量大小的条件下对叶片气动 性能影响的实验研究。首先,探讨了叶型表面粗糙度的形成机理和对气动性能影响的初步原理。其次,设计了 在风洞实现局部增加表面粗糙度对翼型性能影响的实验条件和实验方案。最后,对风力机专用叶型进行的叶片 表面局部增加粗糙度的风洞实验,结果证明了在叶片压力面尾缘通过适当增加一定宽度、一定粗糙度的粗糙带 可以增大叶片的有效升力系数。

The basic principle and influence of the lift enhancement with local roughness were discussed firstly. Then, the experimental conditions and scheme of the lift enhancement in wind tunnel were designed. Finally, the results proved that increasing the roughness of the wind turbine blade airfoil trailing edge can improve the lift coefficient and lift drag ratio coefficient in some condition.