Characterization of Vortex Generators Induced Flow around Wind Turbine Airfoil
Characterization of Vortex Generators Induced Flow around Wind Turbine Airfoil
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DOI：
10.4028/www.scientific.net/amm.448-453.1779
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发表时间：
2013-10
期刊：
影响因子：
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通讯作者：
L. Dai;Hui Zhang;Jianhui Jiao;Xin Li;Shun Kang
中科院分区：
文献类型：
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作者：
L. Dai;Hui Zhang;Jianhui Jiao;Xin Li;Shun Kang
涡流发生器是控制涡轮机气流分离的有效手段。为了解涡流发生器控制流动分离的机理，利用CFD软件对带涡流发生器的翼型Du97W300的绕流场进行了数值模拟和分析，并通过与实验结果的对比验证了该数值方法的有效性。此外，还计算分析了安装四种不同类型涡流发生器的翼型绕流场。结果表明：反向旋转的涡流发生器诱导的螺旋涡近似沿流向沿着发展，可以延迟失速，提高翼型的最大升力系数。但同向旋转涡发生器产生的螺旋诱导涡几乎沿着涡发生器方向发展，不能有效地延迟失速。在反向旋转的涡流发生器中，矩形涡流发生器的Q积分（诱导涡的特征参数）是三角形涡流发生器的2倍，前三角形涡流发生器的Q积分与后三角形涡流发生器的Q积分几乎相等。
Vortex generators (VGs) are an effective way to control flow separation in wind turbine. To understand the mechanism of VGs controlling flow separation, the flow field around airfoil Du97W300 with VGs was simulated and analyzed with CFD tools, and this numerical method is validated through the comparison between the numerical results and the experimental results. Furthermore, the flow fields around airfoil equipped with four different types of VGs are calculated and analyzed. The results show that the helical vortex induced by counter-rotating VGs develop approximately along streamwise direction; these types of VGs can cause a delay in stall and enhance the maximum airfoil lift coefficient. However the helical induced vortex actuated by the co-rotating VGs develop nearly along vortex generator direction and cannot cause a delay in stall effectively. In the counter-rotating VGs, the Q integration (the character parameter of induced vortex) of rectangular is twice of the triangle, and the Q integration of the forward triangle is almost equal to the backward triangle VGs.