CFD Analysis of Wind Turbine Blade With Winglets

2012 ◽  
Author(s):  
Alka Gupta ◽  
R. S. Amano
Keyword(s):  
Power Generation ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Low Cost ◽  
Wind Turbine Blade ◽  
Computational Time ◽  
Parameter Study ◽  
Cfd Analysis ◽  
Straight Blade ◽  
Winglet Height

This study is aimed at investigating the aerodynamic performance of the wind turbine blade with winglets and compares its performance in terms of the power generated with a regular straight blade without winglet. Adding a winglet to the wind turbine blade improves the power production without increasing the projected rotor area. A parameter study is carried out where two of the key parameters which describe a winglet design namely the cant angle and the winglet height are varied. The winglet is bent towards the pressure (upstream) side. Pro/ENGINEER is used to generate a straight wind turbine blade which is then modified in SPACECLAIM to attach a winglet to it. Single blade analysis approach is chosen to carry out the computation, as this involves less computational time and low cost. Results show that adding a winglet to a straight blade increases its power output by 2% to 20%. In addition, winglet which has a cant angle of 45° performs better, generating more power than the winglet which is perpendicular to the blade (cant angle 90°). Also, the power generation increases with the increase in the winglet height. Amongst the four winglet designs discussed, the design W4 with cant angle of 45° and winglet height of 4% rotor radius performs the best resulting in 20% improvement in the power generation when added to a straight blade.

Design and Analysis of Wind Turbine Blades: Winglet, Tubercle, and Slotted

2013 ◽  
Author(s):  
Alka Gupta ◽  
Abdulrahman Alsultan ◽  
R. S. Amano ◽  
Sourabh Kumar ◽  
Andrew D. Welsh
Keyword(s):  
Power Generation ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Alternative Energy ◽  
Turbine Blades ◽  
Three Dimensional ◽  
Wind Turbine Blade ◽  
Wind Turbine Blades ◽  
Wind Speeds ◽  
Governing Factor

Energy is the heart of today’s civilization and the demand seems to be increasing with our growing population. Alternative energy solutions are the future of energy, whereas the fossil-based fuels are finite and deemed to become extinct. The design of the wind turbine blade is the main governing factor that affects power generation from the wind turbine. Different airfoils, angle of twist and blade dimensions are the parameters that control the efficiency of the wind turbine. This study is aimed at investigating the aerodynamic performance of the wind turbine blade. In the present paper, we discuss innovative blade designs using the NACA 4412 airfoil, comparing them with a straight swept blade. The wake region was measured in the lab with a straight blade. All the results with different designs of blades were compared for their performance. A complete three-dimensional computational analysis was carried out to compare the power generation in each case for different wind speeds. It was found from the numerical analysis that the slotted blade yielded the most power generation among the other blade designs.

Aerodynamic Comparison of Straight Edge and Swept Edge Wind Turbine Blade

2008 ◽  
Author(s):  
R. S. Amano ◽  
Ryan J. Malloy
Keyword(s):  
Renewable Energy ◽  
Wind Energy ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Optimization Technique ◽  
Wind Turbine Blade ◽  
Direct Result ◽  
Low Wind Speed

Recently there has been an increase in the demand for the utilization of clean renewable energy sources. This is a direct result of a rise in oil prices and an increased awareness of human induced climate change. Wind energy has been shown to be one of the most promising sources of renewable energy. With current technology, the low cost of wind energy is competitive with more conventional sources of energy such as coal. This however is only true in areas of high wind density. These areas are not as abundant and therefore the number of profitable sites is limited. This paper explores the possibility increasing the number of profitable sites by optimizing wind turbine blade design for low wind speed areas. The two methods of optimization that are investigated are first, optimizing the angle of attack and chord length for a given airfoil cross section at different positions along the blade and second implementing a swept blade profile. The torque generated from a blade using only the first optimization technique is compared to that generated from a blade using both techniques as well as that generated by NTK500/41 turbine using LM19.1 blades. Performance will be investigated using the CFD solver FLUENT.

Wind Turbine Blade Design and Analysis With Tubercle Technology

2012 ◽  
Author(s):  
Sourabh Kumar ◽  
R. S. Amano
Keyword(s):  
Wind Turbine ◽  
Flow Pattern ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Cad Model ◽  
Blade Design ◽  
Cfd Analysis ◽  
Straight Blade ◽  
Turbine Blade Design ◽  
Insight Into

The objective of this project is to construct a CAD model for tubercle wind turbine. Once the model is developed a complete CFD analysis of the flow pattern around the wind turbine will be carried out. The main objective of the study is to analyze and compare the performance of the tubercle wind turbine with the usual wind turbine. The power developed by both the turbine blades can be compared to support the use of tubercle. The tubercles are very effective for increasing the lift without stalling. The main objective of this project is to study the aerodynamic advantages of tubercle turbine blade. The effort will be to compare the obtained results with the straight blade of the same airfoil. This will provide insight into the advantages of using the tubercle blade. This technology being new the study is done numerically to study the overall effect of the tubercle.

scholarly journals Design and Analysis of Dimple Arrangement on a Small Wind Turbine Blade

2019 ◽  
Vol 9 (2) ◽  
pp. 3552-3557
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Aerodynamic Performance ◽  
Wind Turbine Blade ◽  
Performance Estimation ◽  
Cfd Analysis ◽  
Blade Surface ◽  
Ansys Fluent ◽  
Small Wind Turbine ◽  
Overall Performance

This article predominantly focuses on the performance estimation of a small wind turbine blade when a dimple arrangement is made along its upper surface. The dimple arrangement is grooved at two locations: 0.25c and 0.5c, where c is the chord length of the turbine blade. A CFD analysis using the k-ε turbulence model is carried out on the selected blade sections NREL S823 and S822. The continuity and momentum equations are solved using ANSYS Fluent Solver to assess the aerodynamic performance of the proposed design. The effect of introducing a dimple on the blade surface has shown to delay the flow separation, with the formation of vortices. Further, the overall performance of the blade is simulated using GH BLADED and the results acquired are discussed.

Stochastic Optimization of a Horizontal-Axis Composite Wind Turbine Blade

2020 ◽  
Author(s):  
Mishal Thapa ◽  
Samy Missoum
Keyword(s):  
Power Generation ◽  
Stochastic Optimization ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Turbine Blades ◽  
Average Power ◽  
Wind Turbine Blade ◽  
Horizontal Axis ◽  
Wind Turbine Blades ◽  
Alternative Source

Abstract In this paper, the stochastic optimization of a horizontal-axis composite wind turbine blade is performed. Wind energy has become widely popular in recent decades as an alternative source of energy and many studies have been devoted to finding an optimal wind turbine blade using deterministic optimization. However, the actual responses of the wind turbine blade such as power generation are affected by the stochastic nature of wind, uncertainties in material properties and modeling parameters, and so on. This can have an undesirable impact on the performance and reliability of blades, which demands the consideration of uncertainties during optimization. To this end, a surrogate-based stochastic optimization of a wind turbine blade considering the influence of randomness in wind speed on power generation was studied. A slight gain in average power over the baseline blade was obtained and it demonstrated the promise of the presented framework for the design of wind turbine blades.

scholarly journals CFD analysis of the angle of attack for a vertical axis wind turbine blade

2019 ◽  
Vol 182 ◽  
pp. 154-165 ◽  
Author(s):  
Mohamed M. Elsakka ◽  
Derek B. Ingham ◽  
Lin Ma ◽  
Mohamed Pourkashanian
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
Angle Of Attack ◽  
Vertical Axis ◽  
Wind Turbine Blade ◽  
Cfd Analysis ◽  
Vertical Axis Wind Turbine
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