大型水平轴风力机叶片过渡段的断面造型

Sectional formation of blade transient segment of large-scale horizontal-axis wind turbines

从叶片强度的观点出发,探讨大型水平轴风力机叶片过渡段平面轮廓及其断面的造型方法.通过数学解析方法建立过渡段的平面轮廓及断面由叶片轴颈的圆形到工作段的翼型根断面的确定方法,给出过渡段平面轮廓与其各断面周线的三维坐标.用该方法对一兆瓦机组叶片的过渡段进行造型.结果说明本文所提出的叶片过渡段平面轮廓与断面造型方法具有的特点是:断面过渡平滑,无应力集中断面;各过渡断面的轮廓线都有精确的空间坐标,为叶片模具制造提供准确的工艺数据.

The formation procedure of planar contour and cross-sections of blade transient segment was discussed for large-scale horizontal-axis wind turbines. The method for determining its planar contour and cross-sections, which changed from a circle at blade neck to an airfoil at blade working segment, were given by means of mathematical analysis. Further, the evaluation formulae of three-dimensional coordinates of its planar contour and sectional contours were given, also. Finally, the formation of blade transient segment of a 1 000 kW wind turbine with the method presented in this paper was illustrated at the end of this paper, showing that the section transient was smooth without any stress concentration section, and a set of accurate spatial coordinates were provided for the contour of transient sections, giving precise processing data for manufacturing of blade mould.