Effect of main spar ply Parameters on performance of composite wind turbine blades

Abstract

The change of layer parameters of composite material will affect the performance of wind turbine blades. In this paper, in order to study the regularity of the variation of the ply parameters of the main spar on the structural performance of the large-scale wind turbine blade, a 5 MW wind turbine blade was taken as the research object. By changing the angle of the main spar ply and the ply ratio at different ply angles, the different wind turbine blades were established which had different ply plans. The numerical simulation was conducted to get the pressure on the blade surface through FLUENT software at rated wind speed. After this, the static analysis and modal analysis were been performed to the blades which applied load. The results show that the maximum stress the blade bears is the smallest when the main spar layup angle of fibre was 0°, illustrating that 0° layup angle could withstand bending load better. So the angle 0° should be the main layup angle of the main spar. And the modal frequency and structural performance of blades is best when the angle 0° accounts for layup angle 49.333%.