Advances in Horizontal Axis Wind Turbine Blade Designs: Introduction of Slots and Tubercle

2015 ◽  
Vol 137 (5) ◽  
Author(s):  
Mohamed Ibrahim ◽  
Abdulrahman Alsultan ◽  
Shaohua Shen ◽  
Ryoichi S. Amano
Keyword(s):  
Wind Energy ◽  
Fossil Fuels ◽  
Industrial Revolution ◽  
Strong Dependence ◽  
Blade Design ◽  
Power Performance ◽  
Horizontal Axis Wind Turbine ◽  
Wind Speeds ◽  
Numerical Studies ◽  
Wind Velocities

Despite being harvested thousands of years ago, wind energy was neglected during the industrial revolution because of the strong dependence on fossil fuels. However, after the alarming decrease in the fossil fuels reserves, many have drawn their attentions back to a renewable energy technology, especially the wind energy. This paper presents some of the new designs that are being tested, including slotted blades and tubercles design models. The experimental results are used to validate the numerical studies that are being conducted parallel to the experiments for better understanding and more detailed results. The new slotted blade design produced more power compared to the straight blade for lower wind speeds, while the tubercle blades showed better power performance in severe wind conditions and a more steady behavior under unsteady and higher wind velocities.

Performance of a HAWT Rotor with a Modified Blade Configuration

2021 ◽  
Vol 30 (1) ◽  
pp. 201-220
Author(s):  
Tabrej Khan ◽  
Balbir Singh ◽  
Mohamed Thariq Hameed Sultan ◽  
Kamarul Arifin Ahmad
Keyword(s):  
Wind Energy ◽  
Wind Turbines ◽  
Open Loop ◽  
Power Coefficient ◽  
Speed Ratio ◽  
Second Phase ◽  
Blade Design ◽  
Horizontal Axis Wind Turbine ◽  
Wind Speeds ◽  
And Performance

As the world focuses more on clean and green Earth, wind energy plays a significant role. Wind energy is a renewable source of energy that can cope with the ongoing global fossil fuel crisis. The wind energy converters like wind turbines have been studied a lot in terms of design and performance. The current work includes analyzing the output effects of a horizontal axis wind turbine (HAWT) with a modified blade configuration at specific wind speeds. A numerical investigation is carried out using two different numerical software on the chosen airfoil used in blade design validated with the analysis carried out in open-loop wind tunnels. The study is divided into two phases: first, the selected airfoil is tested experimentally and using CFD, and then the findings are compared to those of the University of Illinois Urbana Champaign wind tunnel tests at low Reynolds numbers. The second phase includes the numerical analysis based on the blade element momentum method and non-linear lifting line simulations of modified blade design at high Reynolds number. The numerical results of rotor performance analysis have been compared to existing experimental results. The findings of all numerical investigations agree with those of the experiments. An optimal value of the power coefficient is obtained at a particular tip speed ratio close to the desired value for large wind turbines. For maximum power, this study investigates the optimum pitch angle. The work demonstrated the improved HAWT rotor blade design to produce better aerodynamic lift and thus improve performance.

scholarly journals Assessment of wind energy potential in East Azarbaijan province of Iran (Case Stady: Sahand station)

2015 ◽  
Vol 17 (2) ◽  
pp. 418-425
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Fossil Fuels ◽  
Ground Level ◽  
Energy Potential ◽  
Wind Speeds ◽  
Mean Wind Speed ◽  
Wind Energy Potential ◽  
Seasonal Wind

<p>Today&#39;s world requires a change in how the use of different types of energy. With declining reserves of fossil fuels for renewable energies is of course the best alternative. Among the renewable energy from the wind can be considered one of the best forms of energy can be introduced. Accordingly, most countries are trying to identify areas with potential to benefit from this resource.</p> <p>The aim of this study was to assess the potential wind power in Sahand station of Iran country. Hourly measured long term wind speed data of Sahand during the period of 2000-2013 have been statistically analyzed. In this study the wind speed frequency distribution of location was found by using Weibull distribution function. The wind energy potential of the location has been studied based on the Weibull mode. The results of this study show that mean wind speed measured at 10 m above ground level is determined as 5.16 m/s for the studied period. This speed increases by, respectively, 34.78 % and 41.21 %, when it is extrapolated to 40 and 60 m hub height.</p> <div> <p>Long term seasonal wind speeds were found to be relatively higher during the period from January to September. At the other hand, higher wind speeds were observed between the period between 06:00 and 18:00 in the day. These periods feet well with annual and daily periods of maximum demand of electricity, respectively.&nbsp;</p> </div> <p>&nbsp;</p>

Modeling and Performance Analysis of a Small Horizontal Axis Wind Turbine

2020 ◽  
Vol 143 (3) ◽  
Author(s):  
Osarobo Ighodaro ◽  
David Akhihiero
Keyword(s):  
Wind Turbine ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Horizontal Axis ◽  
Power Coefficient ◽  
Computational Technique ◽  
Horizontal Axis Wind Turbine ◽  
Design And Optimization ◽  
Wind Speeds ◽  
Improved Design

Abstract Wind energy is increasingly becoming a major discussion amongst renewable energy sources due to its sustainability, reduced impact on the environment, and being significantly cheaper than conventional fossil fuels. Researchers have been particularly concerned with studying improved design and optimization using computational technique and experimentation. This research aims at designing blades for a small horizontal axis wind turbine for low Reynolds number using blade element momentum theory and using computational fluid dynamics (cfd) and experiment to analyze its performance. Two airfoils (SG6050 and SG6043) were selected for different regions of the blade span. Four turbulent models were used in predicting its performance. The performance was analyzed for wind speeds between 2 m/s and 7 m/s. Studies showed that the blade is capable of generating power up to 241 W with a power coefficient of 34.3% at a speed of 6 m/s. The computed power coefficient is in good agreement with experimental results of 33.7%.

scholarly journals Designing a Tapperless Blade with an S-4320 Airfoil on a Micro-Scale Horizontal Axis Wind Turbine (Case Studies at PT Lentera Bumi Nusantara)

2021 ◽  
Vol 3 (1) ◽  
pp. 27-34
Author(s):  
Reza Simatupang ◽  
Deddy Supriatna
Keyword(s):  
Wind Turbine ◽  
Quantitative Research ◽  
Horizontal Axis ◽  
Blade Design ◽  
Horizontal Axis Wind Turbine ◽  
Microsoft Excel ◽  
Quantitative Research Methods ◽  
Micro Scale ◽  
Wind Speeds ◽  
Horizontal Axis Wind Turbines

This article aims to design a taperless blade in a micro-scale wind turbine in medium wind speed, a case study at PT Lentera Bumi Nusantara. The methodology used in this research is quantitative research methods. Based on the test results in calculating the data using Microsoft Excel software and the blade airfoil design simulation using Qblade software, the use of the S-4320 airfoil in the application of the taperless blade design has research results that show that the airfoil design of the blade produces mechanical power at moderate wind speeds. It can be concluded that this blade design shows that the taperless blade with S-4320 airfoil can be applied to medium wind speeds in micro-scale horizontal axis wind turbines. Artikel ini bertujuan untuk merancang bilah jenis taperless pada turbin angin skala mikro dalam kecepatan angin sedang, studi kasus pada PT Lentera Bumi Nusantara. Metodologi yang digunakan dalam penelitian ini adalah dengan metode penelitian kuantitatif. Berdasarkan hasil pengujian dalam perhitungan data menggunakan software Microsoft Excel dan simulasi perancangan desain airfoil  bilah menggunakan software Qblade, penggunaan airfoil S-4320 dalam pengaplikasian desain bilah jenis taperless memiliki hasil penelitian yang menunjukan bahwa desain airfoil bilah tersebut menghasilkan tenaga mekanik pada kecepatan angin sedang. Dapat disimpulkan dalam desain bilah ini menunjukan bahwa bilah jenis taperless dengan airfoil S-4320 dapat diterapkan pada kecepatan angin sedang pada turbin angin sumbu horizontal skala mikro.

A novel hybrid metaheuristic optimization method to estimate medium-term output power for horizontal axis wind turbine

2019 ◽  
Vol 233 (5) ◽  
pp. 646-658 ◽  
Author(s):  
Firat Ekinci ◽  
Tugce Demirdelen ◽  
Inayet Ozge Aksu ◽  
Kemal Aygul ◽  
Burak Esenboga ◽  
...  
Keyword(s):  
Wind Speed ◽  
Wind Energy ◽  
Wind Power ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Optimization Method ◽  
Energy Sources ◽  
Medium Term ◽  
Horizontal Axis Wind Turbine

The increasing damage caused by fossil fuels has made it a necessity for new and clean energy sources. In recent years, the use of wind energy from renewable energy sources has increased, which is a new and clean energy source. Wind energy is everywhere in nature. The wind speed changes depending on time. Thus, the wind power is unstable. In order to keep this disadvantage at a minimum level, future power estimation studies have been carried out. In these studies, different methods and algorithms are applied to estimate short and medium term in wind power. In this study, artificial neural network, particle swarm optimization and firefly algorithm (FA) as a new method are used for the first time in predicting wind power. As input data, temperature, wind speed and rotor speed the data recorded in the SCADA in wind turbines are used to predict medium-term wind speed and also wind power. Each method is compared in detail and their performances are revealed.

Optimal Performance of a Modified Three-Blade Savonius Turbine Using Frontal Guiding Plates

2010 ◽  
Author(s):  
Mohamed H. Mohamed ◽  
Ga´bor Janiga ◽  
Eleme´r Pap ◽  
Dominique The´venin
Keyword(s):  
Wind Energy ◽  
Output Power ◽  
Urban Areas ◽  
Fossil Fuels ◽  
Target Function ◽  
Flow Simulation ◽  
Power Coefficient ◽  
Simulation Code ◽  
Geometrical Properties ◽  
Wind Speeds

Wind energy is one of the most promising sources of renewable energy. It is pollution-free, available locally, and can help in reducing the dependency on fossil fuels. Although a considerable progress has already been achieved, the available technical design is not yet adequate to develop reliable wind energy converters for conditions corresponding to low wind speeds and urban areas. The Savonius turbine appears to be particularly promising for such conditions, but suffers from a poor efficiency. The present study considers an improved design in order to increase the output power and the static torque of the classical three-blade Savonius turbine, thus obtaining a higher efficiency and better self-starting capability. To achieve this objective three geometrical properties are optimized simultaneously: 1) the position of an obstacle shielding the returning blade; 2) the position of a deflector guiding the wind toward the advancing blade; and 3) the blade skeleton line. As a whole, fifteen free parameters are taken into account during the automatic optimization process, carried out by coupling an in-house library (OPAL) relying on Evolutionary Algorithms with an industrial flow simulation code (ANSYS-Fluent). The output power coefficient is the single target function and must be maximized. The relative performance improvement amounts to more than 50% at the design point compared with the classical configuration.

A 3D Wind Turbine Simulator for Aerodynamics Education

2013 ◽  
Author(s):  
John Moreland ◽  
Steve Dubec ◽  
Tyamo Okosun ◽  
Xiuling Wang ◽  
Chenn Zhou
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Mixed Reality ◽  
Turbine Blades ◽  
Blade Design ◽  
Horizontal Axis Wind Turbine ◽  
Energy Education ◽  
Educational Challenge ◽  
Aerodynamic Properties ◽  
Contour Plots

The energy production and performance of wind turbines is heavily impacted by the aerodynamic properties of the turbine blades. Designing a wind turbine blade to take full advantage of the available wind resource is a complex task, and teaching students the aerodynamic aspects of blade design can be challenging. To address this educational challenge, a 3D software package was developed as part of the Mixed Reality Simulators for Wind Energy Education project, sponsored through the U.S. Department of Education’s FIPSE program. The software is suited for introductory wind energy courses and covers topics including blade aerodynamics, wind turbine components, and energy transfer. The simulator software combines a 3D model of a utility-scale Horizontal Axis Wind Turbine (HAWT) with animation, a set of interactive controls, and a series of computational fluid dynamics (CFD) simulations of an airfoil under a number of conditions. Students can fly around the wind turbine to view from any angle, adjust transparency layers to view components inside the nacelle, adjust a cross-section plane along the length of a blade to view the details of the blade design, and manipulate sliders to adjust variables such as angle of attack and Reynolds number and see contour plots in real-time. The application is available for download at www.windenergyeducation.org, and is planned for release as open source.

scholarly journals Comprehensive Analysis with Enhanced Resolution of HAWT Blade using CFD

2021 ◽  
Vol 18 (17) ◽  
Author(s):  
Amjith Lilly RAVEENDRAN ◽  
Bavanish BALA
Keyword(s):  
Wind Energy ◽  
Wind Turbines ◽  
Power Output ◽  
Fossil Fuels ◽  
Turbine Blades ◽  
Electrical Power ◽  
Blade Angle ◽  
Power Sources ◽  
Wind Velocities ◽  
Electrical Power Output

Energy is an important aspect for all countries. Due to the overexploitation of resources, nonrenewable resources, such as fossil fuels, are depleting day by day. This calls for alternative power sources, such as wind energy. Wind energy is a clean and inexhaustible source of energy. One of the ways of harvesting this energy is using wind turbines, which transform the kinetic energy of wind into electrical power output. Wind turbines face many problems, such as low wind hours, design issues, and so on. The main focus of this work is to find the optimum blade angle of turbine blades, in order to produce the maximum power output, even at low wind hours. In this study, CFD analysis is done on a 5 MW wind turbine blade at wind velocities 3, 12.5 and 25 m/s, which are the cut in, rated, and cut out velocities of wind turbines, respectively. The range of angles under consideration varies from 20 to 89 °. A 3D model of the blade is analyzed using ANSYS Fluent 19.0. The optimum blade angle is identified, and the characteristics of the curves of blade angles, with respect to different parameters, are obtained. HIGHLIGHTS Optimum Blade angle for better moment Pressure and velocity Characteristics at various blade angles 5MW HAWT blade moments for wind velocity of 3,12.5 and 25 m/s The maximum moment is obtained at an angle 82 degree at various wind velocities GRAPHICAL ABSTRACT

scholarly journals Blade design for horizontal axis wind turbine: 3D model.

2019 ◽  
Vol 13 (1) ◽  
pp. 135-143
Author(s):  
David Esteban Albadan Molano ◽  
Jorge Enrique Salamanca Céspedes
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Wind Turbines ◽  
3D Model ◽  
Horizontal Axis ◽  
Computer Assisted ◽  
Blade Design ◽  
Horizontal Axis Wind Turbine ◽  
Computer Assisted Design ◽  
Horizontal Axis Wind Turbines

Wind energy is one of the best important sources of renewable energy and an excellent alternative for the transition to sustainable energy that the planet earth needs. The wind energy is contained in the air particles in movement, forming kinetic energy.  This energy could be transformed into another type of energy such as electricity, through the use of wind turbines. It is known that horizontal axis wind turbines are more efficient energetically, the power output of a horizontal axis wind turbine depends of it aerodynamic performance; therefore, the correct geometric design of the propeller is essential for an optimum wind turbine. This article analyzes the most relevant aspects in the design of a wind propeller, using MATLAB® software to illustrate its behavior, suggests an ideal airfoil for wind applications to use in the 3D modeling of the blades using the computer assisted design, this blades has been built with a 3D printer.

Impact of Wind-Assisted Technologies on Resistance and Stability of Commercial Ship

CFD Letters ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 95-115
Author(s):  
Aditya Agung Haripriyono ◽  
Yaseen Adnan Ahmed ◽  
Mohammed Abdul Hannan
Keyword(s):  
Carbon Dioxide ◽  
Renewable Energy ◽  
Wind Energy ◽  
Carbon Dioxide Emissions ◽  
Fossil Fuels ◽  
Cfd Simulation ◽  
Carbon Dioxide Emission ◽  
Wind Speeds ◽  
Low Wind Speed ◽  
The Impact

The use of fossil fuels on commercial ships significantly contributes to the increase of carbon dioxide emission, and adaptation of renewable energy can help control that emission efficiently. Historically, the extraction of wind energy is found to be the best renewable energy solution for commercial ships; and recently, with renewed interest in this area, various wind energy extraction devices are proposed in the literature. This study investigates the effectiveness of one such technology, wing-sail, on a tanker ship. The NACA 4412 series is adopted to design the sail in this regard, and a fowler flap is added to aid the sail in low wind speed. ANSYS Fluent is used to carry out this CFD simulation-based study. The effects of onboard wing-sails under various apparent wind angles, wind speeds, and wing-sail orientations have been examined. The impact of wing-sail on the stability of the ship is also analyzed. It is concluded that the ship can save fuel and reduce carbon dioxide emissions by 1.8% to 2.4% while using the wing-sail with the aid of a fowler flap. Also, this combination of wing-sail with the fowler flap is found to be the best in providing extra thrust for commercial ships without significantly sacrificing its stability.

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