Effects of dielectric barrier discharge plasma have been studied on the wake velocity profiles of a section of a 660 kW wind turbine blade in plunging motion in a wind tunnel. The corresponding unsteady velocity profiles show remarkable improvement when the plasma actuators were operating and the angles of attack of the model were beyond the static stall angles of the airfoil. As a result the drag force was considerably reduced. It is further observed that the plasma-induced flow attenuates the leading edge vortices that are periodically shed into wake and diminishes the large eddies downstream. The favorable effects of the plasma augmentation are shown to occur near the uppermost and lowermost positions of the plunging paths where the wake is primarily dominated by the vortices of the same sign. The wake structure in the presence of the flow induced by the plasma actuators shows that the actual effective angles of attack seen by the plunging airfoil reduces in comparison with that for the case of the plasma augmentation off situation.

已经研究了介质阻挡放电等离子体对风洞中 660 kW 风力涡轮机叶片截面的尾流速度分布的影响。当等离子体致动器运行并且模型的攻角超出翼型的静态失速角时，相应的非定常速度曲线显示出显着的改善。结果，阻力显着降低。进一步观察到，等离子体引起的流动减弱了前缘涡流，这些涡流周期性地变成尾流并减少下游的大涡流。显示等离子体增强的有利影响发生在坠落路径的最高和最低位置附近，其中尾流主要由相同符号的涡流支配。