Abstract

This article presents flutter prediction of composite wind turbine blades through time domain aeroelastic analysis using unsteady blade element momentum (BEM) theory based aerodynamic model. Comparison of the flutter speeds obtained in the present study with those previously obtained through Eigen solution based approach using Theodorsen’s theory based aerodynamic model for several different lamination sequences and blade configuration has been presented. It has been observed that both the approaches predict highest flutter speed at the same blade configuration and lamination sequence. However, flutter limit obtained through the present approach is less as compared to that obtained through Eigen solution based approach.

摘要

本文介绍了基于非定常叶片元动量 (BEM) 理论的气动模型，通过时域气动弹性分析对复合材料风力涡轮机叶片的颤振进行预测。比较了本研究中获得的颤振速度与之前通过基于特征解的方法获得的颤振速度，该方法使用基于 Theodorsen 理论的空气动力学模型，用于几种不同的层压序列和叶片配置。已经观察到，这两种方法都预测了相同叶片配置和层压顺序下的最高颤振速度。然而，与通过基于特征解的方法获得的相比，通过本方法获得的颤振极限要小。