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中文摘要：
介绍了利用栅片改善风力机叶型大迎角下气动性能的研究结果。通过对风力机专用翼型的数值模拟,研究了栅片对翼型流动分离的控制效果,并在数值模拟结果的基础上对栅片进行基因算法优化。优化过程采用多岛基因算法,以N-S方程为控制方程,以升力最佳为目标,对栅片进行多参数优化。结果表明：栅片可以有效控制翼型的失速特性,抑制翼型大迎角下的流动分离,推迟失速攻角和增加升力;基因优化算法能更大地提升栅片的控制效果。
英文摘要：
Research results about improving the aerodynamic performance of wind turbine airfoils at high angles of attack with parallel flats are presented.Numerical simulation of the wind turbine blade aerodynamic characteristics is carried out to study the separation flow control using parallel flats.Based on the numerical simulation results,the parameters of parallel flats are optimized by genetic algorithm（GA）.In the optimization,the multi-island GA is employed and the N-S equations are adopted to acquire the aerodynamics functions of the airfoil.Optimization results indicate that the parallel flats can control the stall characteristics effectively,restraining the flow separation at high angle attack,delaying the stall and enhancing the lift force.The GA optimization can improve the effect of flow control using parallel flats obviously.
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