3D CFD Analysis of a Vertical Axis Wind Turbine
3D CFD Analysis of a Vertical Axis Wind Turbine
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DOI：
10.3390/en8043013
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发表时间：
2015-04
期刊：
影响因子：
3.2
通讯作者：
A. Alaimo;A. Esposito;A. Messineo;C. Orlando;D. Tumino
中科院分区：
文献类型：
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作者：
A. Alaimo;A. Esposito;A. Messineo;C. Orlando;D. Tumino
计算流体动力学（CFD）是分析涡轮机运行过程中复杂非定常气动流动的有力手段。在这项工作中，不同的数值方面对模拟旋转风力涡轮机的准确性的影响进行了研究。特别是，网格尺寸和结构，时间步长和旋转速度的影响已被考虑到不同的风力涡轮机几何形状的模拟。本研究的应用目的是比较直叶片垂直轴风力机涡轮机与螺旋叶片垂直轴风力机的性能。通过使用计算流体动力学ANSYS® Fluent®软件进行分析，求解雷诺平均Navier-Stokes（RANS）方程。首先，在数值程序的初步设置中使用二维模拟并计算近似的性能参数，即扭矩、功率、升力和阻力系数。然后，进行三维模拟，目的是准确确定与直叶片和螺旋叶片涡轮机相关的复杂空气动力学流的差异。然后报告不同转速值的静态和动态结果。
To analyze the complex and unsteady aerodynamic flow associated with wind turbine functioning, computational fluid dynamics (CFD) is an attractive and powerful method. In this work, the influence of different numerical aspects on the accuracy of simulating a rotating wind turbine is studied. In particular, the effects of mesh size and structure, time step and rotational velocity have been taken into account for simulation of different wind turbine geometries. The applicative goal of this study is the comparison of the performance between a straight blade vertical axis wind turbine and a helical blade one. Analyses are carried out through the use of computational fluid dynamic ANSYS® Fluent® software, solving the Reynolds averaged Navier–Stokes (RANS) equations. At first, two-dimensional simulations are used in a preliminary setup of the numerical procedure and to compute approximated performance parameters, namely the torque, power, lift and drag coefficients. Then, three-dimensional simulations are carried out with the aim of an accurate determination of the differences in the complex aerodynamic flow associated with the straight and the helical blade turbines. Static and dynamic results are then reported for different values of rotational speed.