Open AccessExperimental and numerical investigations of actuator disks for wind turbines
Author(s) -
Ranjbar Mohammad Hassan,
Zanganeh Kia Hadi,
Nasrazadani Seyyed Abolfazl,
Gharali Kobra,
Nathwani Jatin
Publication year - 2020
Publication title -
energy science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 29
ISSN - 2050-0505
DOI - 10.1002/ese3.670
Subject(s) - solidity , turbine , actuator , rotor (electric) , range (aeronautics) , wake , wind power , control theory (sociology) , power (physics) , mechanics , mathematics , engineering , computer science , physics , mechanical engineering , aerospace engineering , thermodynamics , electrical engineering , control (management) , artificial intelligence , programming language
Abstract 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.