基于外部流场作用下叶片翼珊的复合载荷特性研究

Research on Composite Load Characteristics of Blade Airfoil Under the External Flow Field Action

风力机叶片翼珊在任何情况下所承受到的载荷大小、种类均有所不同,即便是充分考虑到空气动力载荷,也会由于实际运行环境的影响,而使实际承受载荷的大小与理论计算值有所偏差。因此,从空气动力载荷、时变气动载荷、湍流载荷、尾流互扰载荷、空气密度变化引起的载荷等5方面较系统地研究了载荷分布及变化特点,进而说明了风力机叶片在运行过程中,其动载荷的不稳定性及计算方法,为风力机的可靠性设计及优化设计提供了理论求解方法。

It is different that sizes and types of load in airfoil of wind turbine bladeunder design conditions and running environment. Even as aerodynamic load which is consideredfully in the design, the actual loadwill have deviation with the theoretical value because of the actual environmental factors. The five aspects of load distribution and change characteristicswere studiedsystematicalIy in this article includingthe aerodynamic load, timevarying aerodynamic load,turbulence load, wake turbulence entangled load, load changes byair density changes caused, and then it was illustratedthat instability and calculation method of the dynamic load, which provided theoretical solution for optimize design and reliability theoretical method of wind turbine.