风力机复合材料叶片流固耦合分析

为了给风力机叶片优化设计及研发工作提供准确的数据,减少成品的开发周期,降低成本,并保证风力机的安全运行,提出一种针对铺层后风力机风轮及叶片并利用ANSYS Workbench进行单向流固耦合分析的方法.主要在传统翼型NACA4412模型下进行叶片建模改进,应用铺层设计把叶梢、叶根、展向等改成渐变式厚度并进行流固耦合分析.数值模拟结果表明:叶片在风速13 m/s时叶尖部分压力最大,此时叶片弦长及其厚度处于最小状态,叶片中部靠近叶片前缘的位置为应力最大处.

Fluid-structure coupling analysis for composite blade of wind turbine

In order to provide the accurate data for the optimization design and development work of wind turbine blade, reduce the product development cycle and cost, and ensure the safe operation of wind turbine, a method for the unidirectional fluid-structure coupling analysis for the wind wheel and blade of wind turbine after the layer was proposed with the ANSYS Workbench. The blade modeling was mainly improved based on the traditional airfoil NACA4412 model. With the layer design, the blade tip, blade root and blade span direction were changed to the tapered thickness and were carried out with the fluid-structure coupling analysis. The results of numerical simulation show that at the wind speed of 13 m/s, the blade tip has the largest pressure, while the blade chord and thickness are at the minimum state. In addition, the stress at the middle blade position near the blade front is the largest.