变形
失速(流体力学)
后缘
翼型
计算流体力学
涡轮机
多边形网格
涡轮叶片
升力系数
雷诺平均Navier-Stokes方程
湍流
机械
计算机科学
航空航天工程
模拟
工程类
物理
数学
几何学
雷诺数
计算机视觉
作者
Robert Alexis Leonczuk Minetto,Marius Paraschivoiu
出处
期刊:Energy
[Elsevier]
日期:2020-07-01
卷期号:202: 117705-117705
被引量:12
标识
DOI:10.1016/j.energy.2020.117705
摘要
This study compares the performance of a Vertical Axis Wind Turbine with and without using morphing blades. It also presents a Computational Fluid Dynamics (CFD) modeling methodology to morph a blade while performing a rotational movement by using a combination of overset meshes and deforming meshes. The flow is simulated by solving the Unsteady Reynold Averaged Navier Stokes equations with Menter’s SST k-omega as the turbulence model. Proper care is taken to capture the presence of dynamic stall and vortex shedding that appears during the blade’s rotation, which is associated with a reduction in power output. The accuracy is verified and validated by comparing simulation results with experimental data, as well as testing for grid and time step sensitivity. The power coefficient curves obtained from simulating three different airfoils, a NACA0012 and two cases delimiting the maximum deformations of the trailing edge, are analyzed. A final proposed morphing scenario is tested, where the blade morphing is applied during a portion of the rotation to prevent dynamic stall. The morphing approach resulted in an improvement of 46.2% of the overall power output.
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