On the accuracy of turbulence models for CFD simulations of vertical axis wind turbines

Rezaeiha, Abdolrahim; Montazeri, Hamid; Blocken, Bje Bert

doi:10.1016/j.energy.2019.05.053

Cited by 227 publications

(77 citation statements)

References 90 publications

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“…However, as the market demand shows, there is a great demand for this type of The reason mentioned in the paragraph above is not the only reason for this topic. In recent years, many experimental and numerical studies of micro scale vertical-axis wind turbines have been carried out [7][8][9][10][11][12][13][14][15][16][17][18][19]. A lot of research is also underway in the field of multi-megawatt offshore Darrieus-type wind turbines [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…Their main purpose was to investigate the properties of dynamic flow detachment on the rotor blade at a low tip speed ratio. Another valuable numerical work of these authors was devoted to the research of three different small sizes wind turbines [18]. Zong et al [43] proposed a method of passive control of dynamic stall of Darreius wind turbine blades.…”

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of a H-Darrieus Wind Turbine for a Series of 4-Digit NACA Airfoils

2020

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The purpose of this paper is to estimate the H-Darrieus wind turbine aerodynamic performance, aerodynamic blade loads, and velocity profiles downstream behind the rotor. The wind turbine model is based on the rotor designed by McDonnell Aircraft Company. The model proposed here consists of three fixed straight blades; in the future, this model is planned to be developed with controlled blades. The study was conducted using the unsteady Reynolds averaged Navier–Stokes (URANS) approach with the k-ω shear stress transport (SST) turbulence model. The numerical two-dimensional model was verified using two other independent aerodynamic approaches: a vortex model and the extended version of the computational fluid dynamics (CFD) code FLOWer. All utilized numerical codes gave similar result of the instantaneous aerodynamic blade loads. In addition, steady-state calculations for the applied airfoils were also made using the same numerical model as for the vertical axis wind turbine (VAWT) to obtain lift and drag coefficients. The obtained values of lift and drag force coefficients, for a Reynolds number of 2.9 million, agree with the predictions of the experiment and XFOIL over a wide range of angle of attack. A maximum rotor power coefficient of 0.5 is obtained, which makes this impeller attractive from the point of view of further research. Research has shown that, if this rotor were to work with fixed blades, it is recommended to use the NACA 1418 airfoil instead of the original NACA 0018.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a H-Darrieus Wind Turbine for a Series of 4-Digit NACA Airfoils

2020

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“…Along the chord the separation point was found to be important factor after conducting 8 different cases, with element size no more than 5 million in every case. Similar studies that chronicles around different CFD techniques to study WT performance were describe in [26][27][28][29][30][31][32][33][34] 2. Methodoogy…”

Section: Introductionmentioning

confidence: 93%

CFD Simulation of HAWT Blade and Implementation of BEM Theory

Younas

Ali

Shafique

2019

SJET

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Wind turbine blade design is of profound importance in the renewable energy industry. This paper reflects a simple yet effective methodology to simulate a Horizontal Axis Wind Turbine (HAWT) blade. A blade of HAWT was designed with the implementation of the Blade Element Momentum Theory (BEM). With a Tip speed ratio (TSR) of 8, a blade of radius 10 m was designed with NACA 63-615 as a considered airfoil. In order to study the characteristics of flow over the designed blade, Computational Fluid Dynamics (CFD) simulations using ANSYS Fluent package were performed. Using frame motion, an unstructured mesh of around 2 million, and y + = 1, contours of pressure, velocity, and flow around the immediate vicinity of the blade were shown. The value of torque was found to be 5.6 kN.m for the designed blade. Lastly, a grid convergence study was done to find out the optimal size of mesh for this kind of simulation. Results clearly showed the efficacy of fluent package to model simulations of this type.

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Section: Vawt Employing Naca Four-digit Airfoilmentioning

confidence: 99%

Performance analysis of a Darrieus-type wind turbine for a series of 4-digit NACA airfoils

Rogowski

Hansen

Bangga

2019

Preprint

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Abstract. The purpose of this paper is to estimate the H-Darrieus wind turbine aerodynamic performance, aerodynamic blade loads and velocity profiles downstream behind the rotor. The wind turbine model is based on the rotor designed by McDonnell Aircraft Company. The model proposed here consists of three fixed straight blades; in the future this model is planned to be develop with controlled blades. The study was conducted using the unsteady Reynolds averaged Navier-Stokes (URANS) approach with the k-ω shear stress transport (SST) turbulence model. The numerical two-dimensional model was verified using two other independent aerodynamic approaches: the vortex model developed in Technical University of Denmark (DTU) and the extended version of the CFD code FLOWer at the University of Stuttgart (USTUTT). All utilized numerical codes gave similar result of the instantaneous aerodynamic blade loads. In addition, steady-state calculations for the applied airfoils were also made using the same numerical model as for the vertical axis wind turbine (VAWT) to obtain lift and drag coefficients. The obtained values of lift and drag force coefficients, for a Reynolds number of 2.9 million, agree with the predictions of the experiment and XFoil over a wide range of angle of attack. The maximum rotor power coefficients are obtained at 0.5, which makes this impeller attractive from the point of view of further research. This work also addresses the issue of determining the aerodynamic performance of the rotor with various 4-digit NACA airfoils. The effect of two airfoil parameters, maximum airfoil thickness and maximum camber, on aerodynamic rotor performance is investigated. Research has shown that if this rotor were to work with fixed blades it is recommended to use the NACA 1418 airfoil instead of the original NACA 0018.

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On the accuracy of turbulence models for CFD simulations of vertical axis wind turbines

Cited by 227 publications

References 90 publications

Performance Analysis of a H-Darrieus Wind Turbine for a Series of 4-Digit NACA Airfoils

Performance Analysis of a H-Darrieus Wind Turbine for a Series of 4-Digit NACA Airfoils

CFD Simulation of HAWT Blade and Implementation of BEM Theory

Performance analysis of a Darrieus-type wind turbine for a series of 4-digit NACA airfoils

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