Wind field simulation of large horizontal-axis wind turbine system under different operating conditions

This article aims to study the forces applied to the rotors of horizontal axis wind turbines. The aerodynamics of a turbine are controlled by the flow around the rotor, or estimate of air charges on the rotor blades under various operating conditions and their relation to the structural dynamics of the rotor are critical for design. One of the major challenges in wind turbine aerodynamics is to predict the forces on the blade as various methods, including blade element moment theory (BEM), the approach that is naturally adapted to the simulation of the aerodynamics of wind turbines and the dynamic and models (CFD) that describes with fidelity the flow around the rotor. In our article we proposed a modeling method and a simulation of the forces applied to the horizontal axis wind rotors turbines using the application of the blade elements method to model the rotor and the vortex method of free wake modeling in order to develop a rotor model, which can be used to study wind farms. This model is intended to speed up the calculation, guaranteeing a good representation of the aerodynamic loads exerted by the wind.

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Efficient contribution of partially tip cascaded horizontal-axis wind turbine

Advances in Mechanical Engineering ◽

10.1177/1687814019892113 ◽

2019 ◽

Vol 11 (11) ◽

pp. 168781401989211

Author(s):

Deyaa Nabil Elshebiny ◽

Ali AbdelFattah Hashem ◽

Farouk Mohammed Owis

Keyword(s):

Wind Turbine ◽

Aerodynamic Performance ◽

Operating Conditions ◽

Horizontal Axis ◽

National Renewable Energy Laboratory ◽

Horizontal Axis Wind Turbine ◽

Ansys Fluent ◽

Knowing That ◽

Turbine Performance ◽

Blade Tip

This article introduces novel blade tip geometric modification to improve the aerodynamic performance of horizontal-axis wind turbine by adding auxiliary cascading blades toward the tip region. This study focuses on the new turbine shape and how it enhances the turbine performance in comparison with the classical turbine. This study is performed numerically for National Renewable Energy Laboratory Phase II (non-optimized wind turbine) taking into consideration the effect of adding different cascade configurations on the turbine performance using ANSYS FLUENT program. The analysis of single-auxiliary and double-auxiliary cascade blades has shown an impact on increasing the turbine power of 28% and 76%, respectively, at 72 r/min and 12.85 m/s of wind speed. Knowing that the performance of cascaded wind turbine depends on the geometry, solidity and operating conditions of the original blade; therefore, these results are not authorized for other cases.

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Miniature horizontal axis wind turbine system for multipurpose application

Energy ◽

10.1016/j.energy.2014.07.046 ◽

2014 ◽

Vol 75 ◽

pp. 216-224 ◽

Cited By ~ 16

Author(s):

F.J. Xu ◽

F.G. Yuan ◽

J.Z. Hu ◽

Y.P. Qiu

Keyword(s):

Wind Turbine ◽

Horizontal Axis ◽

Horizontal Axis Wind Turbine ◽

Wind Turbine System

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Experimental investigations of winglet effects on blade geometry of small horizontal axis wind turbine rotors

Journal of Engineering Research ◽

10.36909/jer.10767 ◽

2021 ◽

Author(s):

Manoj Kumar Chaudhary ◽

◽

S. Prakash ◽

Keyword(s):

Wind Speed ◽

Wind Turbine ◽

Lift Coefficient ◽

Research Work ◽

Operating Conditions ◽

Horizontal Axis ◽

Power Coefficient ◽

Experimental Investigations ◽

Horizontal Axis Wind Turbine ◽

Blade Geometry

In this research work, the investigation and optimization of small horizontal axis wind turbine blade at low wind speed is pursued. The experimental blades were developed using the 3D printing additive manufacturing technique. The airfoils E210, NACA2412, S1223, SG6043, E216, NACA4415, SD7080, SD7033, S1210 and MAF were tested at the wind speed of 2-6 m/s. The airfoils and optimum blade geometry were investigated with the aid of the Xfoil software at Reynolds number of 100,000. The initial investigation range included tip speed ratios from 3 to 10, solidity from 0.0431 – 0.1181 and angle of attacks from 2o to 20o. Later on these parameters were varied in MATLAB and Xfoil software for optimization and investigation of the power coefficient, lift coefficient, drag coefficient and lift to drag ratio. The cut-in wind speed of the rotors was 2 and 2.5 m/s with the winglet-equipped blades and without winglets. It was found that the E210, SG6043, E216 NACA4415 and MAF airfoil displayed better performance than the NACA 2412, S1223, SD7080, S1210 & SD7003 for the geometry optimized for the operating conditions and manufacturing method described.

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Geometrical Design of a Rotor Blade for a Small Scale Horizontal Axis Wind Turbine

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.c5036.098319 ◽

2019 ◽

Vol 8 (3) ◽

pp. 3390-3400

Keyword(s):

Wind Turbine ◽

Rotor Blade ◽

Operating Conditions ◽

Horizontal Axis ◽

Small Scale ◽

Horizontal Axis Wind Turbine ◽

Geometrical Properties ◽

Momentum Theory ◽

Bem Theory ◽

Blade Element

In the present study, Blade Element Momentum theory (BEMT) has been implemented to heuristically design a rotor blade for a 2kW Fixed Pitch Fixed Speed (FPFS) Small Scale Horizontal Axis Wind Turbine (SSHAWT). Critical geometrical properties viz. Sectional Chord ci and Twist distribution θTi for the idealized, optimized and linearized blades are analytically determined for various operating conditions. Results obtained from BEM theory demonstrate that the average sectional chord ci and twist distribution θTi of the idealized blade are 20.42% and 14.08% more in comparison with optimized blade. Additionally, the employment of linearization technique further reduced the sectional chord ci and twist distribution θTi of the idealized blade by 17.9% and 14% respectively, thus achieving a viable blade bounded by the limits of economic and manufacturing constraints. Finally, the study also reveals that the iteratively reducing blade geometry has an influential effect on the solidity of the blade that in turn affects the performance of the wind turbine.

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