Simulation of aerodynamic performance affected by vortex generators on blunt trailing-edge airfoils

Simulation of aerodynamic performance affected by vortex generators on blunt trailing-edge airfoils
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涡发生器对钝后缘翼型气动性能影响的仿真

DOI:
10.1007/s11431-009-0425-5
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发表时间:
2010-01
期刊:
Science in China - Series E: Technological Sciences
影响因子:
--
通讯作者:
Yang Ke, Zhang Lei, Xu JianZhong
Yang Ke, Zhang Lei, Xu JianZhong
中科院分区:
其他
文献类型:
--
作者:
Yang Ke, Zhang Lei, Xu JianZhong

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对带有和不带有涡流发生器(VG)的风力机翼型和钝后缘翼型进行了数值模拟研究,并对翼型的性能进行了分析。通过对DU 91-W2-250翼型的仿真验证了数值方法和模型的可信性。在此翼型的基础上,通过对称增加厚度的方式融合出一种新的6%弦钝后缘翼型,并通过关键攻角计算得到其特性曲线。此外,通过与未混合的翼型进行比较,分析了混合翼型上的压力分布。考虑了 VG 引起的流向涡与尾随涡或分离涡的相互作用,随后揭示了 VG 如何抑制边界层分离。
An investigation was carried out by numerical simulation on a wind turbine airfoil and a blunt trailing-edge airfoil with and without vortex generators (VGs), and the performance of the airfoils was analyzed. By the simulation of airfoil DU 91-W2-250 it was verified that the numerical method and model were credible. Based on this airfoil, a new one with a blunt trailing edge of 6% chord was blended by symmetrically adding thickness, and its characteristics curves were obtained through computing at key angles of attack. Additionally, the pressure distribution on blended airfoil was analyzed by comparing to the airfoil without blend. The interaction of streamwise vortices induced by VGs with trailing vortex or separation vortex was considered, followed by the uncovery of how VGs can suppress the boundary layer separation.
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