Wind tunnel experiments and Delayed Detached Eddy Simulation of a three-bladed micro vertical axis wind turbine
Wind tunnel experiments and Delayed Detached Eddy Simulation of a three-bladed micro vertical axis wind turbine
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DOI：
10.1016/j.renene.2018.05.096
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发表时间：
2018-12
期刊：
影响因子：
8.7
通讯作者：
M. Elkhoury;T. Kiwata;K. Nagao;T. Kono;F. ElHajj
中科院分区：
文献类型：
--
作者：
M. Elkhoury;T. Kiwata;K. Nagao;T. Kono;F. ElHajj
目前的工作试图通过风洞实验和数值模拟来研究正交飞行器型小型垂直轴风力发电机（O-VAWT）的性能。实验在开路风洞中进行，在五种不同的风速下针对三种不同的叶片长宽比进行了扭矩测量。采用基于 Spalart-Allmaras (SA) 湍流模型 [1] 的延迟分离涡模拟 (DDES) 的三维非定常流模拟，因为它在精度和计算需求之间具有良好的折衷。 DDES 模型准确预测涡轮叶片附近的大规模分离湍流结构的能力和性能系数得到了全面评估。仔细分析了风速、叶片展弦比和自由流流入角对涡轮机性能的影响。还研究了不同展弦比和风速的涡轮机自启动特性和旋转叶片附近的流场特性。
The present work attempts to study the performance of an Orthopter-type small-scale Vertical Axis Wind Turbine (O-VAWT) by means of wind tunnel experiments and numerical simulations. Experiments were conducted in an open circuit wind tunnel, where torque measurements were made at five different wind speeds for three different blade aspect ratios. A three-dimensional unsteady flow simulation utilizing the Delayed Detached Eddy Simulation (DDES), based on Spalart-Allmaras (SA) turbulence model [1], is employed for it possesses a good compromise between accuracy and computational demands. The capability of the DDES model in accurately predicting massively separated turbulent flow structures adjacent to turbine blades and performance coefficients are thoroughly assessed. Effects of wind speed, blade aspect ratio, and freestream inflow angle, on the performance of the turbine are carefully analyzed. Characteristics of turbine self-start and flow field adjacent to rotating blades with different aspect ratios and wind speeds are also investigated.