Analysis of the Effect of Variation in the Number of Taperless Type Blades on the Performance of a Horizontal Axis Wind Turbine with Naca 4412 Airfoil (original) (raw)
Related papers
With the shortage of fossil fuels, alternative energy has been thrust into the national spotlight as a major necessity in order to keep up with the increasing energy demands of the world. Wind energy has been proven one of the most viable sources of renewable energy. A wind turbine is a rotary device that extracts energy from the wind. Rotor blade is a key element in a wind turbine generator system to convert wind energy into mechanical energy. In this paper rotor blade is made up of single airfoil NACA 0018. The CFD analysis of NACA 0018 airfoil is carried out at various blade angles at 32 m/s wind speed. The analysis showed that blade angle 10º gives optimum power. The pressure and velocity distributions are plotted. These results are compared with wind tunnel experiment values.
Performance Analysis of Small Horizontal Axis Wind Turbine with Airfoil NACA 4412
International Journal of Science, Technology & Management
The horizontal axis wind turbine (HAWT) design with low wind speed requires blade geometry selection. The analysis uses the potential flow panel method and the integral boundary layer formulation to analyze wind flow around the airfoil. The blade design with the blade element momentum (BEM) theory has an aerodynamic coefficient value along the blade. Power wind calculates to model the wind shear pressure at each blade. This research aims to determine the wind turbine rotor based on the performance, including the power coefficient, tip speed ratio, power, and rpm. The simulation uses an airfoil NACA 4412 which has optimal coefficient lift (Cl) = 1.92 at 190 pitch of angle, coefficient drag (Cd) = 0.0635 at 130 pitch angle and Cl / Cd = 155 at tilt angle = 40. Five models of 2.5 m diameter blades with different angles for each chord. The test results show that the change in the speed ratio affects the power coefficient so that the optimal power coefficient on NACA 4412 in experiment 5...
Energies, 2013
Three different horizontal axis wind turbine (HAWT) blade geometries with the same diameter of 0.72 m using the same NACA4418 airfoil profile have been investigated both experimentally and numerically. The first is an optimum (OPT) blade shape, obtained using improved blade element momentum (BEM) theory. A detailed description of the blade geometry is also given. The second is an untapered and optimum twist (UOT) blade with the same twist distributions as the OPT blade. The third blade is untapered and untwisted (UUT). Wind tunnel experiments were used to measure the power coefficients of these blades, and the results indicate that both the OPT and UOT blades perform with the same maximum power coefficient, C p = 0.428, but it is located at different tip speed ratio, λ = 4.92 for the OPT blade and λ = 4.32 for the UOT blade. The UUT blade has a maximum power coefficient of C p = 0.210 at λ = 3.86. After the tests, numerical simulations were performed using a full three-dimensional computational fluid dynamics (CFD) method using the k-ω SST turbulence model. It has been found that CFD predictions reproduce the most accurate model power coefficients. The good agreement between the measured and computed power coefficients of the three models strongly
Characteristic Analysis of Horizontal Axis Wind Turbine Using Airfoil NACA 4712
Journal of Mechanical Engineering Science and Technology, 2019
Wind energy has been developed and used as a source of electrical energy by converting wind energy into electrical energy using a generator. There are some wind turbine parameters that important for wind turbines design and model, includes the size of the rotor radius, airfoil selection, chord length, and pitch angle. The study aims to characterize the performance of a horizontal axis wind turbine using computational methods. The methods used a design and simulation of NACA 4412 and NACA 4712 airfoil using QBlade software using wind conditions in the region of Pancer, Jember. Results show that the maximum Cl value of NACA 4712 is higher than in NACA 4412. NACA 4712 has a maximum Cl value = 1.696 at α = 14 o while NACA 4412 airfoil has a maximum value of Cl = 1.628 at α = 15 o. NACA 4712 has the maximum value of Cl/Cd = 153 at α = 2 o , while the NACA 4412 has a maximum value of Cl/Cd = 133.5 at α = 5.5 o. The maximum value of Cl/Cd 4712 is higher than the NACA 4412. At 7.66 m/s of wind speed with 10% turbulence conditions, wind turbines with NACA 4712 airfoil have Cp turbine performance parameters of 0.49929 and obtain a power of 1.15 kW, while wind turbines with NACA 4412 have Cp turbine performance parameters of 0.395365 and obtained power of 0.889 kW at the same wind speed.
CFD analysis of horizontal axis wind turbine blade for optimum value of power
2013
With the shortage of fossil fuels, alternative energy has been thrust into the national spotlight as a major necessity in order to keep up with the increasing energy demands of the world. Wind energy has been proven one of the most viable sources of renewable energy. A wind turbine is a rotary device that extracts energy from the wind. Rotor blade is a key element in a wind turbine generator system to convert wind energy into mechanical energy. In this paper rotor blade is made up of single airfoil NACA 0018. The CFD analysis of NACA 0018 airfoil is carried out at various blade angles at 32 m/s wind speed. The analysis showed that blade angle 10o gives optimum power. The pressure and velocity distributions are plotted. These results are compared with wind tunnel experiment values. Copyright © 2013 International Energy and Environment Foundation All rights reserved.
Comparative Critique on Power Generation in Wind Turbines
Chemical engineering transactions, 2019
In this study, the performance of different wind turbines is compared using Qblade software. Typically wind turbines are categorized as Horizontal Axis Wind Turbine (HAWT), and Vertical axis wind turbine (VAWT) which in this paper Darrieus type as a VAWT is discussed with HAWT. The airfoil selected for this study is NACA 0012, and from simulations, it can be seen in which wind speed range, each type has higher efficiency. Then, the parameters involved in their performance is discussed, and suggestions are made on how to modify them to have a higher output power. Qblade contains the XFOIL airfoil analysis functionalities which make a software a single tool which comprises all functionality needed for the design and simulation of vertical and horizontal axis wind turbines. The benefits of the proper airfoil design optimal are increasing the efficiency of wind turbines and maximization of the power produced.
IOSR Journal of Engineering, 2012
An aerodynamic analysis tool for analysis of horizontal axis wind turbine blades is developed by using both Blade Element Momentum (BEM) Theory and Computer Program. The method is used to optimize blade geometry to give the maximum power for a given wind speed, a constant rotational speed, a number of blades and a blade radius. The airfoil profiles and their aerodynamic data are taken from an existing airfoil database for which experimental lift and drag coefficient data are available. The goal of this study was to analyze the effects of different airfoil profiles blade on the overall wind turbine performance.
Comparative Analysis of Three Wind Turbines of Varying Blade Sizes
This work focuses on the Comparative analysis of three Horizontal Axis Wind Turbines of varying blade sizes suitable for use in low wind regimes. The three turbines weredesigned to generate 250Watt, 140Watt and 62Watt of power respectively at rated wind speed of 6.5m/s. The three turbines were assembled and installed to run at a turbine height of 10m each. The relevant measuring equipment were also installed and measurements were taking over a period of three months. The percentage performance of the turbines shows the follows; the2m blade turbine, 83.96%; the 1.5m blade turbine, 95.81%; and the 1m blade turbine, 94.89%. However, on monthly average, the percentage performances are respectively, 57%; 72.61%; 87.24% for the 2m; 1.5m and 1m blade turbine. From the performance of the three turbines as explained above, it has been proved that whereas the size of the blade positively influence the amount of power produced, the efficiency of the wind turbine increases with decreasing size of the blades
International Journal of Smart Grid and Clean Energy, 2019
While wind energy is widely used across the world, its utilization, especially in cases where the speed of wind is low, has not been optimized. This study aimed at establishing the impact of pitch angle magnitude utilized in horizontal wind turbines at low speed. A NACA 6412 type airfoil made from mahogany's wood was installed to a wind tunnel to measure the performance. The effect of pitch angle was determined at low wind speeds using 0ᵒ, 2ᵒ, 4ᵒ, 6ᵒ, 8ᵒ, 10ᵒ, and 12ᵒ angles. The speed was varied between 1 m/s and 5 m/s. The wind originated from a blower installed and was controlled by an anemometer to determine the speed. The findings of the study established that the variation of pitch angles results to differences in power and rotation of the rotor produced by the wind turbines. The output of the experiment was current and voltage converted to power and total efficiency. The highest electrical power of 9.7240W was produced at the most optimal pitch angle of 8 ° and a wind speed of 5 m/s. In the end, the study showed that horizontal wind turbines with NACA 6412 and 8ᵒ pitch angle produce the highest total efficiency at 11.2% and 5 m / s speed.