Near-wake structure of full-scale vertical-axis wind turbines
Near-wake structure of full-scale vertical-axis wind turbines
复制标题
全尺寸垂直轴风力发电机的近尾流结构
DOI：
10.1017/jfm.2020.578
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发表时间：
2021
影响因子：
3.7
通讯作者：
Dabiri, John O.
中科院分区：
文献类型：
--
作者：
Wei, Nathaniel J.;Brownstein, Ian D.;Cardona, Jennifer L.;Howland, Michael F.;Dabiri, John O.
为了设计和优化具有最大功率密度和最小尾迹损失的垂直轴风力涡轮机阵列，需要仔细考虑这些涡轮机在实际运行条件下尾迹的固有三维结构。据此，提出了一种新的体积颗粒跟踪测速方法，用于在现场条件下测量全尺寸vawt周围的三维流场。实验在兰开斯特的优化风能现场实验室（FLOWE）进行，使用6台摄像机和人造雪作为示踪颗粒。在两种不同的叶尖速比和基于转子直径的雷诺数下，分别获得了带有5个直叶片的2kw涡轮和带有3个螺旋叶片的1kw涡轮的速度和涡量测量结果。观察到螺旋叶片涡轮诱导的倾斜尾迹。通过考虑旋转叶片脱落的涡线的动力学，将倾斜尾迹与螺旋叶片的几何形状联系起来。此外，还量化了倾斜尾迹对涡轮旋转诱导的顺流马蹄形涡的影响。最后，研究了这种动态对尾流恢复的影响。因此，本研究在VAWT的几何特征与其近尾迹区域显著的三维流动特征之间建立了一种流体-力学联系，这可能为涡轮机的设计和涡轮机的高效排列提供信息。
To design and optimize arrays of vertical-axis wind turbines (VAWTs) for maximal power density and minimal wake losses, a careful consideration of the inherently three-dimensional structure of the wakes of these turbines in real operating conditions is needed. Accordingly, a new volumetric particle-tracking velocimetry method was developed to measure three-dimensional flow fields around full-scale VAWTs in field conditions. Experiments were conducted at the Field Laboratory for Optimized Wind Energy (FLOWE) in Lancaster, CA, using six cameras and artificial snow as tracer particles. Velocity and vorticity measurements were obtained for a 2 kW turbine with five straight blades and a 1 kW turbine with three helical blades, each at two distinct tip-speed ratios and at Reynolds numbers based on the rotor diameter . A tilted wake was observed to be induced by the helical-bladed turbine. By considering the dynamics of vortex lines shed from the rotating blades, the tilted wake was connected to the geometry of the helical blades. Furthermore, the effects of the tilted wake on a streamwise horseshoe vortex induced by the rotation of the turbine were quantified. Lastly, the implications of this dynamics for the recovery of the wake were examined. This study thus establishes a fluid-mechanical connection between the geometric features of a VAWT and the salient three-dimensional flow characteristics of its near-wake region, which can potentially inform both the design of turbines and the arrangement of turbines into highly efficient arrays.
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影响因子：
3.7
作者：
L. Klotz;K. Gumowski;J. Wesfreid
通讯作者：
J. Wesfreid
具有展向梯度的扑动和旋转轮廓上的流动分离
影响因子：
3.4
作者：
J. Wong;B. laBastide;D. Rival
通讯作者：
D. Rival
影响因子：
4.6
作者：
Kinzel, Matthias;Araya, Daniel B.;Dabiri, John O.
通讯作者：
Dabiri, John O.
影响因子：
2.8
作者：
Theriault, Diane H.;Fuller, Nathan W.;Hedrick, Tyson L.
通讯作者：
Hedrick, Tyson L.
用双多普勒雷达观察海上风电场后面的苏醒
DOI：
--
发表时间：
2018
期刊：
Journal of Physics: Conference Series
影响因子：
--
作者：
N. Nygaard;Alexander Christian Newcombe
通讯作者：
Alexander Christian Newcombe