Numerical determination of the nominal point of a wind turbine

6th ModTech International Conference - Modern Technologies in Industrial Engineering

Malael, I.^1 ; Popa, V.A.^1 ; Preda, D.^2

National Research and Development Institute for Gas Turbines, COMOTI, Department of Computational Gas, Dynamics, 220D Iuliu Maniu Blvd., Bucharest

061126, Romania^1

Rolix Series Impex, Basarabiei Blvd, nr. 256, Bucharest, Romania^2

关键词: Blocking method;    Moment coefficient;    Power coefficients;    Scale modeling;    Structured mesh;    Tip speed ratio;    Unsteady analysis;    Vertical axis wind turbines;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/400/4/042038/pdf
DOI  :  10.1088/1757-899X/400/4/042038

来源: IOP

【 摘 要 】

The aim of this paper is to determine the nominal point of a Darrieus vertical axis wind turbine. In this study, two methods have been used. The first case used the DOF method, which requires the designation of the degrees of freedom of the turbine to ascertain the optimal revolution of the turbine for a certain speed of the wind. The second method relies on the unsteady analysis of the turbine for different tip speed ratios. A circular shaped domain was created using ICEMCFD, which was further divided in two subdomains. The first subdomain, the rotor, incorporates the blades and the shaft, while the second subdomain, the stator, represents the outer environment. A structured mesh was chosen for this study. The grid was generated using the blocking method. The chosen parameters for this study have the purpose of capturing the flow around the blades, and especially the boundary layer. For both cases, the variations of the moment coefficient were computed. By multiplying the mean of the moment coefficient with the tip speed ratio, we get the power coefficient. The results of this paper will be tested in a wind tunnel, using an experimental scale model of the turbine.