Parametric study on off-design aerodynamic performance of a horizontal axis wind turbine blade and proposed pitch control

Ashrafi, Z. Najafian; Ghaderi, Majid; Sedaghat, Ahmad

doi:10.1016/j.enconman.2015.01.048

Cited by 40 publications

(7 citation statements)

References 26 publications

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“…The results displayed that, for a 10 m s −1 rise in wind speed, there was about a 10 % increase in power of the wind turbine (Kumar et al, 2013). Ashrafi et al (2015) increased the power coefficient parameter for a horizontal axis wind turbine with 200 KW power generation. This was achieved with the opti-mization of pitch angle with respect to wind speed for different twist angles.…”

Section: Literature Surveymentioning

confidence: 97%

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Horizontal axis wind turbine modelling and data analysis by multilinear regression

Tittus

Diaz²

2020

Mech. Sci.

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Abstract. The modelling of each horizontal axis wind turbine (HAWT) differs due to variation in operating conditions, dynamic parameters, and components. Thus, the choice of profiles also varies for specific applications. So for the better choice of profiles, the wind turbine performance is analysed for different parameters and working conditions. The efficiency of HAWTs mainly depends on the blade, which in turn is related to the profile of the blade, blade orientation, and tip size. Hence, the main aim of the present work is to evaluate the performance of HAWTs for three different blade tip sizes and six different blade twist angles for three major NACA (National Advisory Committee for Aeronautics) airfoils. A statistical analysis is also carried out to find the influence of different performance parameters such as drag, lift, vorticity, and normal force. The static design parameters are considered based on the available literature. A three-bladed offshore HAWT is adopted as the research object in the study. Data visualization using star glyphs and sunray plots is performed, along with multilinear regression analysis. From the multilinear regression analysis and reliable empirical correlations, it is known that drag coefficient and lift coefficient parameters have less significance in contrast to the other parameters which have more significance in the regression model. The different results obtained in terms of parametric coefficients provide an effective way to generate appropriate airfoil profiles for given HAWTs. Thus, the study helps to achieve better turbine performance, and it serves as a benchmark for future studies on HAWTs.

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Section: Literature Surveymentioning

confidence: 97%

“…A high lift-to-drag ratio is required for efficient turbine performance (Burton et al, 2001). Few researchers have contributed their efforts to optimizing the blade geometry using mathematical correlations and simulation of the blade using computational fluid dynamics and Fluent software.…”

Section: Introductionmentioning

confidence: 99%

Horizontal axis wind turbine modelling and data analysis by multilinear regression

Tittus

Diaz²

2020

Mech. Sci.

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“…The theory is focus on an iterative process in which at the beginning is assumed that the axial and tangential induction factors are equal to zero. Then the absolute subtraction control the process until it reaches a tolerance lower than 0.001 (Najafian Ashrafi et al, 2015).…”

Section: Bem Theorymentioning

confidence: 99%

Parametric study of a horizontal axis wind turbine with similar characteristics to those of the Villonaco wind power plant

Sánchez

Hidalgo

Velasco

et al. 2021

J APPL RES TECH ENG

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<p class="JAREAbstract">The present paper focuses on the selection of parameters that maximize electrical energy production of a horizontal axis wind turbine using Python programming language. The study takes as reference turbines of Villonaco wind field in Ecuador. For this aim, the Blade Element Momentum (BEM) theory was implemented, to define rotor geometry and power curve. Furthermore, wind speeds were analyzed using the Weibull probability distribution and the most probable speed was 10.50 m/s. The results were compared with mean annual energy production of a Villonaco’s wind turbine to validate the model. Turbine height, rated wind speed and rotor radius were the selected parameters to determine the influence in generated energy. Individual increment in rotor radius and rated wind speed cause a significant increase in energy produced. While the increment in turbine’s height reduces energy generated by 0.88%.</p>

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“…For instance, Maalawi and Badawy [3] attempted to improve blade performance by analytically determining the optimal beam width and angle of rotation, Xudong et al [4], in addition to these parameters, tried to obtain the most appropriate blade design to achieve maximum performance by taking into account the beam thickness. Additionally, some studies [5,6] examined the effects of different blade types on performance, some researchers [7][8][9] have developed numerical code based on the blade element momentum theory (BEM), while others [10,11] have been able to develop a packaged software for blade design that gives the best performance, taking into account many parameters such as the dynamic and mechanical properties of the material from the phase of the turbine blade sizing to the production phase. Some researchers [12,13] tried to improve blade performance by making systematic changes to the blade profile.…”

Section: Introductionmentioning

confidence: 99%

Effect of Air-Ducted Blade Design on Horizontal Axis Wind Turbine Performance

Yiğit

2020

Energies

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Wind turbines without pitch control are more preferable from economical point of view but aerodynamic stall affects them more and after a critical wind speed local boundary layer separation occurs. Consequently, their power production is relatively low. In this study, air ducts added on the blade and using the airflow from them the kinetic energy of the low-momentum fluid behind the surface was increased and delay of separation of the boundary layer from the surface was examined The Response Surface Optimization method was utilized in order to get the best possible design under the constraints and targets arranged for the parameters termed the diameter, slope, number and angle of attack of the air ducts. By using computational fluid dynamics analysis, optimum parameter values were obtained and air-ducted and air-duct free blade designs were compared. An improvement in power coefficient between 3.4–4.4% depending on wind speed was achieved with the new design. Due to increase in viscous forces, more power from the rotor obtained by opening air ducts up to a critical number. However, the results showed that after the critical number of air duct addition of more duct on the blade reduced the power coefficient.

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Parametric study on off-design aerodynamic performance of a horizontal axis wind turbine blade and proposed pitch control

Cited by 40 publications

References 26 publications

Horizontal axis wind turbine modelling and data analysis by multilinear regression

Horizontal axis wind turbine modelling and data analysis by multilinear regression

Parametric study of a horizontal axis wind turbine with similar characteristics to those of the Villonaco wind power plant

Effect of Air-Ducted Blade Design on Horizontal Axis Wind Turbine Performance

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