本文利用三维PIV测速技术,在B1/K2直流式低速风洞开口段,对小翼对风力机叶尖涡三维运动轨迹的影响展开研究.实验发现,S型小翼对叶尖涡的打散程度大于V型小翼.加装小翼后,使得叶尖涡运动轨迹螺距减小,同时叶尖涡的径向运动距离增加,向外迁移的程度增加.在额定工况下,小翼影响的因素包括风力机功率系数、叶尖涡运动轨迹形态、叶尖涡的强弱,其中小翼对叶尖涡运动轨迹向外迁移的程度和螺距的减小程度占主导因素,小翼对叶尖涡打散程度占次要因素.
In the B1/K2 DC-type low speed wind tunnel opening paragraph using 3D PIV velocimetry to research the influence of wind turbine blade tip winglet vortex motion trajectory The experimental findings,scatter degree S winglet on the tip vortex is larger than the V type vane.After the installation of winglets,tip vortex trajectory pitch decreases,while the radial motion distance of tip vortex increases,increases the degree of outward migration.Adding winglets at rated condition samplification on wind turbine power degree,degree and pitch with the winglet on the tip vortex trajectories of outward migration reduces the degree as well as the winglet on the tip vortex is related to the degree of the decrease of scattered and the extent of pitch winglet on the tip vortex trajectories of outward migration of the dominant factor,the secondary factors on the tip winglet vortex scatter degree.
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