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中文摘要：
以NREL Phase叶片的1/8模型为对象,采用有限体积法求解不可压缩雷诺平均的Navier-Stokes方程组,模拟了风力机叶片的绕流和尾流,分析了叶尖涡的生成和发展过程。结果显示：在叶片尖部,从前缘开始生成的压力面一侧漩涡和从约1/2弦线开始生成的吸力面一侧漩涡在尾缘附近汇合并脱出形成叶尖涡;在近尾流区域,叶尖涡先局部向内迁移,但其原因并非风轮旋转;在远尾流区域,叶尖涡以接近线性的规律持续向外迁移;叶尖涡与叶根涡共同形成的涡系结构,在风轮下游相当一段距离仍然对尾流场产生显著的速度诱导,表明尾涡对风力机尾流场产生主导作用。
英文摘要：
A numerical simulation is performed on the 1/8 scaled model of NREL Phase Ⅵ blade,solving the incompressible Reynolds-averaged Navier-Stokes equations by using the finite volume method.Analysis on the numerical results reveals the generation and development of the blade-tip vortex.At the beginning,a vortex near the pressure side from the leading edge and another vortex on the suction side from about the half chord merge into the blade-tip vortex.In the near wake,the blade-tip vortex firstly moves towards the inner side,which is not caused by rotation but inherited from the characteristics of the fixed blade.In the far wake,the spiral trace of blade-tip vortex continuously expands in a linear way.The wake flow is significantly influenced by the induced velocity of the blade-tip and root vortixes in a considerable long range after the rotor.
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