风力机叶片气动载荷的优化研究

Research on Optimization of Aerodynamic Loads of Wind Turbine Blade

为了研究垂直轴风力机的叶片气动性能,利用流固耦合法模拟了垂直轴风力机在实际工况下的气动载荷分析,模拟结果表明,由于翼型后部较薄,受到的变形应力最大。为了避免因叶片变形而引起风力机整体气动性能下降,提出了通过加大翼型后部厚度的方案来提高叶片的强度,并通过数值模拟对改进后的翼型做了气动性能分析,得出了适当的增加翼型后部厚度,并不会对翼型气动性能造成太大的影响,验证了此方案的有效性。这些研究结论为今后垂直轴风力机的设计制造提供了一定的参考依据。

In order to research dynamic performance blade of vertical axis wind turbine, it uses the fluid solid coupling method to simulate the vertical axis wind turbineiu in the actual condition of aerodynamic load analysis. Simulation result shows that max deformation stress focus thin back. In order to avoid blade deformation in causing wind turbines aerodynamic performhnce decline, it proposes thicken blade back to improve the blade strength. Aerodynamic per]brmance analysis is conducted with data simulation, and result shows that increasing blade thick does not influence blade aerodynamic performance, proving program validity, which sets foundation for vertical axis wind turbine development.