LES simulation and experimental validation of the unsteady aerodynamics of blunt wind turbine airfoils
LES simulation and experimental validation of the unsteady aerodynamics of blunt wind turbine airfoils
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钝性风力机翼型非定常气动的大涡模拟与实验验证
DOI：
10.1016/j.energy.2018.06.093
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发表时间：
2018-09
期刊：
影响因子：
9
通讯作者：
Shen Wen Zhong
中科院分区：
文献类型：
--
作者：
Wang Guofu;Zhang Lei;Shen Wen Zhong
为了研究钝头涡轮机翼型在边界层分离和尾迹涡作用下的非定常性能，采用大涡模拟和风洞实验相结合的方法，在雷诺数为2.62 × 10 ~（-5）的条件下，对钝头涡轮机翼型的气动性能进行了研究。钝头翼型是通过将DU 91-W2-250翼型的后缘在翼型的压力侧和吸力侧对称地扩大到6%和10%弦而获得的。数值模拟采用不可压有限体积Navier-Stokes程序EllipSys 3D，实验在0.5 m × 0.5 m风洞中进行，采用ESP-64 HD型压力扫描仪和TSI热线风速仪测量表面压力和尾流速度。在风洞中用热线捕捉非定常尾迹，并利用EllipSys 3D进行大涡模拟。实验和大涡模拟结果均表明，气动力谱具有与尾涡一致的宽带特性，表明非定常卡门涡面是气动力脉动的驱动机制。此外，尾缘尺寸对边界层中的分离泡和转捩过程也有影响。结果表明，前缘边界层在展向是不稳定的，表现为低频波动。
In order to investigate the unsteady performance of blunt wind turbine airfoils caused by boundary layer separation and wake eddies, this paper studies the aerodynamic performance by large eddy simulation (LES) and wind tunnel experiment at a Reynolds number of 2.62 × 10ˆ5. The blunt airfoils are obtained by enlarging the trailing edge of the DU 91-W2-250 airfoil to 6% and 10% chords symmetrically on both pressure and suction sides of the airfoil. The simulation was carried out with the incompressible finite-volume Navier-Stokes code EllipSys3D; and, the experiment was done in a wind tunnel with a cross-section of 0.5 m × 0.5 m by measuring the surface pressure and wake velocities using ESP-64HD pressure scanner and TSI hot-wire anemometer. The unsteady wake was captured by hot-wire in the wind tunnel, and LES with EllipSys3D. Both experiment and LES show that the spectrum of aerodynamic forces has a broadband nature which is in coincidence with the wake eddies, implying that the unsteady Kármán vortex sheet is the driving mechanism of the force fluctuation. Moreover, the trailing edge size affects the separation bubbles and transition process in the boundary layer. It shows that the boundary layer near the leading edge is unstable in the spanwise direction, which is characterized by low frequency waves.
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DOI：
10.2514/6.2012-2722
发表时间：
2010-01
期刊：
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影响因子：
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作者：
Xiaoming Chen;R. Agarwal
通讯作者：
Xiaoming Chen;R. Agarwal
DOI：
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发表时间：
2009
期刊：
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影响因子：
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作者：
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DOI：
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发表时间：
2008-04
期刊：
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影响因子：
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作者：
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通讯作者：
E. Mayda;C. V. Dam;D. Chao;D. Berg
影响因子：
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作者：
W. Shen;W. Zhu;J. Sørensen
通讯作者：
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DOI：
10.3917/lcp.225.0025
发表时间：
2019
期刊：
Le Carnet PSY
影响因子：
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作者：
Simone Korff-Sausse
通讯作者：
Simone Korff-Sausse