Experimental and numerical investigations of actuator disks for wind turbines,Energy Science & Engineering

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Experimental and numerical investigations of actuator disks for wind turbines
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-03-10 , DOI: 10.1002/ese3.670
Mohammad Hassan Ranjbar ₁ , Hadi Zanganeh Kia ₁ , Seyyed Abolfazl Nasrazadani ₁ , Kobra Gharali _{1,

2} , Jatin Nathwani _{2,

3}

Affiliation

The expenses of a wind turbine modeling in particular a wind farm modeling either numerically or experimentally cause to take the advantages of actuator disks (AD). Porous disks (PD) are used to simulate actuator disks in experiments especially for wake studies. A rotor of a wind turbine replaced by a PD can be modeled efficiently with less cost and process time. For a proper PD selection, some semi‐empirical equations are suggested for a range of solidity of 0.2‐0.6. These equations came from a number of tests. The PDs with different dimensions and solidity values were considered for the tests and models. The results of 2D and 3D numerical simulations and the experimental results show that at the solidity of 0.5, the coefficient of performance of a PD reaches approximately 16/27 which is equal to the Betz's limit; the relation between the coefficient of power and the solidity is fitted by a parabolic equation. The average error of the proposed equations for the power coefficient is reported 1.59%. Finally, based on the current results, some semi‐empirical equations are suggested to help the initial PD selection, and then, the cost of further studies may decrease.

中文翻译：

风力发电机致动器盘的实验和数值研究

在数值上或实验上，风力涡轮机建模，特别是风电场建模的费用都导致利用致动器盘（AD）的优势。多孔盘（PD）用于模拟实验中的执行器盘，尤其是用于尾流研究。可以用较少的成本和处理时间有效地建模被PD取代的风力涡轮机的转子。为了正确地选择局部放电，建议使用一些半经验方程，其稳固性范围为0.2-0.6。这些方程式来自许多测试。测试和模型考虑了具有不同尺寸和硬度值的PD。2D和3D数值模拟的结果以及实验结果表明，在密度为0.5的情况下，PD的性能系数达到大约16/27，这等于贝兹极限。功率系数和固体之间的关系通过抛物线方程拟合。所提出的功率系数方程的平均误差据报道为1.59％。最后，根据当前结果，建议使用一些半经验方程式来帮助初始PD的选择，然后可能会降低进一步研究的成本。

更新日期：2020-03-10

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