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Actuator cell model of the 2D H-Darrieus wind turbine

Rogowski Krzysztof

Journal of Theoretical and Applied Mechanics

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2020

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Vol. 58 nr 1

285--288

EN

This paper analyzes the instantaneous and averaged velocity field in the area of the Dar- rieus wind turbine. The analyzed two-dimensional rotor model consists of two NACA0018 airfoils and a rotating shaft. The working parameters of the rotor correspond to modera- te aerodynamic loads of the blades. The research has been carried out with an innovative method called the Actuator Cell Model. The initial results obtained were compared with the author’s earlier results obtained with the SST k-! model and with experimental studies taken from the literature.

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Velocity field around darrieus wind turbine rotor using actuator cell model and other CFD methods

Rogowski Krzysztof, Rogowska Klaudia

TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk

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2018

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Vol. 22, No 3

195--209

EN

The main purpose of this work is to analyze the usefulness of the active cell model (ACM) developed by the author of this article to estimate the flow field around a single-bladedvertical-axis wind turbine (VAWT) with the Darrieus-type rotor. The obtained flow velocity fields were compared with the experimental values taken from the literature available on the Internet. Additionally, the flow fields around the rotor and the aerodynamic forces were determined using the following approaches: the ke RNG turbulence model, the scale-adaptive simulation (SAS) and the laminar model. The velocity profiles behind the turbine rotor obtained with all numerical approaches are consistent with the experiment. The aerodynamic blade loads obtained using numerical methods also appear to be satisfactory.

3

Steady and unsteady analysis of NACA 0018 airfoil in vertical-axis wind turbine

Rogowski K., Hansen M. O. L., Maroński R.

Journal of Theoretical and Applied Mechanics

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2018

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Vol. 56 nr 1

203--212

EN

Numerical results are presented for aerodynamic unsteady and steady airfoil characteristics of the NACA 0018 airfoil of a two-dimensional vertical-axis wind turbine. A geometrical model of the Darrieus-type wind turbine and the rotor operating parameters used for numerical simulation are taken from the literature. Airfoil characteristics are investigated using the same mesh distribution around the airfoil edges and two turbulence models: the RNG k-ε and the SST Transition. Computed results for the SST Transition model are in good agreement with the experiment, especially for static airfoil characteristics.

4

Numerical Analysis of a Small-Size Vertical-Axis Wind Turbine Performance and Averaged Flow Parameters Around the Rotor

Rogowski K., Maroński R., Piechna J.

Archive of Mechanical Engineering

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2017

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Vol. LXIV, nr 2

205--218

EN

Small-scale vertical-axis wind turbines can be used as a source of electricity in rural and urban environments. According to the authors’ knowledge, there are no validated simplified aerodynamic models of these wind turbines, therefore the use of more advanced techniques, such as for example the computational methods for fluid dynamics is justified. The paper contains performance analysis of the small-scale vertical-axis wind turbine with a large solidity. The averaged velocity field and the averaged static pressure distribution around the rotor have been also analyzed. All numerical results presented in this paper are obtained using the SST k- ω turbulence model. Computed power coefficients are in good agreement with the experimental results. A small change in the tip speed ratio significantly affects the velocity field. Obtained velocity fields can be further used as a base for simplified aerodynamic methods.