尾缘襟翼结构参数对大型风机气动性能影响的仿真研究

Simulation study on trailing edge flaps' structure parameters affecting aerodynamic performance of large wind turbines

利用FAST仿真平台,研究了大型风机智能叶片的尾缘襟翼结构参数对叶片载荷抑制和功率捕获等气动性能的影响。仿真结果表明:尾缘襟翼位于叶尖部位时,在不同风况下,襟翼对叶片具有较好的降载效果,低风况及过渡风况下,功率捕获损失较小;增加襟翼占弦比、长度和摆角范围,在低风况及过渡风况下,可进一步提高叶片的降载能力,但存在一定的功率损失;在高风况下,襟翼占弦比、长度和摆角范围均存在提高叶片降载能力的最佳值,且这3个参数的变化对功率捕获无影响。

Based on the FAST simulation platform, the effect of trailing edge flaps＂ structure parameters, such as the aerodynamic performance of load suppression and power capture, is studied for large wind turbine smart blades in the paper. Under different wind conditions, the simulation results show that better performance of load reduction and less power loss can be obtained for the wind turbine blades when the trailing edge flaps are located near the airfoil section of the blade tip. Besides, when chord length ratio, length, and angle range of flaps are all increased, the load reduction performance can be further improved under low and transition wind conditions. However, this case causes a certain power loss. Under high wind conditions, there exists a group of optimum values for chord length ratio, length and angle range of flaps to improve the load reduction performance of wind turbine blades. Meanwhile, above three parameters don＇t affect the power capture ability.