Wind turbine performance in shear flow and in the wake of another turbine through high fidelity numerical simulations with moving mesh technique

Wind Energy ◽  
2012 ◽  
Vol 16 (1) ◽  
pp. 123-138 ◽  
Author(s):  
Joseph Seydel ◽  
Alberto Aliseda
Keyword(s):  
Shear Flow ◽  
Numerical Simulations ◽  
Wind Turbine ◽  
Moving Mesh ◽  
High Fidelity ◽  
Turbine Performance ◽  
Mesh Technique

The Effect of Distributed Roughness on the Power Performance of Wind Turbines

2010 ◽  
Author(s):  
G. Pechlivanoglou ◽  
S. Fuehr ◽  
C. N. Nayeri ◽  
C. O. Paschereit
Keyword(s):  
Steady State ◽  
Wind Tunnel ◽  
Numerical Simulations ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Power Production ◽  
Aerodynamic Performance ◽  
Power Performance ◽  
Turbine Performance ◽  
Wind Tunnel Measurements

The effects of distributed roughness on wind turbines are extensively investigated in this paper. The sources of roughness are identified and analyzed and their effects on airfoil are estimated from simulations and measured with wind tunnel measurements. In addition to the environmental and manufacturing induced roughness, several forms of roughness-related shape deviations are investigated and their effects on the aerodynamic performance of airfoils is qualitatively predicted through numerical simulations. The actual effects of roughness on wind turbine performance are also presented through power production measurements of wind turbines installed in sandy environments. These measurements are correlated with simulated power predictions, utilizing a steady state BEM code.

scholarly journals A NUMERICAL STUDY OF THE TURBULENCE MODEL INFLUENCE ON A SAVONIUS WIND TURBINE PERFORMANCE BY MEANS OF MOVING MESH

2019 ◽  
Vol 42 (3) ◽  
pp. 91-93 ◽  
Author(s):  
Nopem Ariwiyono ◽  
Priyo A. Setiawan ◽  
Adi W. Husodo ◽  
Sudiyono . ◽  
Arief Subekti ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Turbulence Model ◽  
Numerical Study ◽  
Moving Mesh ◽  
Turbine Performance ◽  
Savonius Wind Turbine

scholarly journals Wind inflow observation from load harmonics

2017 ◽  
Vol 2 (2) ◽  
pp. 615-640 ◽  
Author(s):  
Marta Bertelè ◽  
Carlo L. Bottasso ◽  
Stefano Cacciola ◽  
Fabiano Daher Adegas ◽  
Sara Delport
Keyword(s):  
Numerical Simulations ◽  
Wind Turbine ◽  
Wind Field ◽  
Wind Farm ◽  
State Observer ◽  
High Fidelity ◽  
Bending Moments ◽  
Out Of Plane ◽  
Wind Characteristics ◽  
Blade Loads

Abstract. The wind field leaves its fingerprint on the rotor response. This fact can be exploited by using the rotor as a sensor: by looking at the rotor response, in the present case in terms of blade loads, one may infer the wind characteristics. This paper describes a wind state observer that estimates four wind parameters, namely the vertical and horizontal shears and the yaw and upflow misalignment angles, from out-of-plane and in-plane blade bending moments. The resulting observer provides on-rotor wind inflow characteristics that can be exploited for wind turbine and wind farm control. The proposed formulation is evaluated through extensive numerical simulations in turbulent and nonturbulent wind conditions using a high-fidelity aeroservoelastic model of a multi-MW wind turbine.

scholarly journals The Influence of Eroded Blades on Wind Turbine Performance Using Numerical Simulations

Energies ◽  
2017 ◽  
Vol 10 (9) ◽  
pp. 1420 ◽  
Author(s):  
Matthias Schramm ◽  
Hamid Rahimi ◽  
Bernhard Stoevesandt ◽  
Kim Tangager
Keyword(s):  
Numerical Simulations ◽  
Wind Turbine ◽  
Turbine Performance

scholarly journals Wind inflow observation from load harmonics

2017 ◽  
Author(s):  
Marta Bertelè ◽  
Carlo L. Bottasso ◽  
Stefano Cacciola ◽  
Fabiano Daher Adegas ◽  
Sara Delport
Keyword(s):  
Numerical Simulations ◽  
Wind Turbine ◽  
Wind Field ◽  
Wind Farm ◽  
High Fidelity ◽  
Bending Moments ◽  
Turbulent Wind ◽  
Out Of Plane ◽  
Wind Characteristics ◽  
Blade Loads

Abstract. The wind field leaves its fingerprint on the rotor response. This fact can be exploited to use the rotor as a sensor: by looking at the rotor response, in the present case in terms of blade loads, one may infer the wind characteristics. This paper describes a wind state observer that estimates four wind parameters, namely the vertical and horizontal shears and the yaw and upflow misalignment angles, from out-of-plane and in-plane blade bending moments. The resulting observer provides on-rotor wind inflow characteristics that can be exploited for wind turbine and wind farm control. The proposed formulation is evaluated by extensive numerical simulations in turbulent and non-turbulent wind conditions using a high-fidelity aeroservoelastic model of a multi-MW wind turbine.

High-Fidelity Numerical Simulations of Supersonic Channel Flows with Isothermal Walls

2021 ◽  
Author(s):  
Luiz Augusto C. Schiavo ◽  
William Wolf ◽  
Britton J. Olson ◽  
Joao Luiz F. Azevedo
Keyword(s):  
Numerical Simulations ◽  
Channel Flows ◽  
High Fidelity

scholarly journals Performance assessment and optimization of a helical Savonius wind turbine by modifying the Bach’s section

2021 ◽  
Vol 3 (8) ◽  
Author(s):  
M. Niyat Zadeh ◽  
M. Pourfallah ◽  
S. Safari Sabet ◽  
M. Gholinia ◽  
S. Mouloodi ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Performance Assessment ◽  
Turbulent Flows ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Tip Speed Ratio ◽  
Basic Model ◽  
Turbine Performance ◽  
Primary Model ◽  
Savonius Wind Turbine

AbstractIn this paper, we attempted to measure the effect of Bach’s section, which presents a high-power coefficient in the standard Savonius model, on the performance of the helical Savonius wind turbine, by observing the parameters affecting turbine performance. Assessment methods based on the tip speed ratio, torque variation, flow field characterizations, and the power coefficient are performed. The present issue was stimulated using the turbulence model SST (k- ω) at 6, 8, and 10 m/s wind flow velocities via COMSOL software. Numerical simulation was validated employing previous articles. Outputs demonstrate that Bach-primary and Bach-developed wind turbine models have less flow separation at the spoke-end than the simple helical Savonius model, ultimately improving wind turbines’ total performance and reducing spoke-dynamic loads. Compared with the basic model, the Bach-developed model shows an 18.3% performance improvement in the maximum power coefficient. Bach’s primary model also offers a 12.4% increase in power production than the initial model’s best performance. Furthermore, the results indicate that changing the geometric parameters of the Bach model at high velocities (in turbulent flows) does not significantly affect improving performance.

scholarly journals Direct numerical simulation of TS-waves over suction panel steps from manufacturing tolerances

2021 ◽  
Author(s):  
H. Lüdeke ◽  
R. von Soldenhoff
Keyword(s):  
Numerical Simulations ◽  
Linear Stability ◽  
Direct Numerical Simulations ◽  
Linear Stability Theory ◽  
High Fidelity ◽  
Order Method ◽  
Direct Simulation ◽  
High Order Method ◽  
Manufacturing Tolerances ◽  
Tollmien Schlichting

AbstractTo determine allowable tolerances between successive suction panels at hybrid laminar wings with suction surfaces, direct numerical simulations of Tollmien–Schlichting waves over different steps are carried out for realistic suction rates on a wind tunnel configuration. Simulations at given suction panel positions over forward and backward facing steps are carried out by the use of a high-order method for the direct simulation of Tollmien–Schlichting wave growth. Comparisons between high-fidelity direct numerical simulations and quick linear stability calculations have shown capabilities and limits of the well-validated linear stability theory design approach.

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