Study of Functional and Airodynamic Design with Blade Parameters of NACA Series (original) (raw)
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Study of Functional and Airodynamic Design with Blade Parameters of NACA Series (NACA 4412)
International journal of engineering research and technology, 2018
Wind turbines are the one of the solutions for the today’s energy crisis in the world. In India plays a significant role in renewable energy generation as it covers more than 70% of the energy generated by the renewable energy sources. Still we have wind turbine with comparatively less efficiency. For improvement in performance of wind turbine we need to develop some technique for performance prediction of the wind turbine. The development of performance prediction is one of the most important aspects of the design of wind turbines. An established methodology is used to calculate the optimal performance parameters of the horizontal axis wind turbine in provisions of the most vital parameters such as tip speed ratio, blade number, pitch angle and wind speed in this paper. Our estimated Result will show that low pitch is recommended for low wind speed regime. Optimum value of tip speed ratio is found within a range of (5 to 11) within the constraints considered. The cut in speed with the remaining parameters is also studied and their effect on power and torque are explored.
Blade Design and Performance Analysis of Wind Turbine
2013
This paper reviews the design optimization of wind turbine blades through investigating the design methods and analyzing the performance of the blades. The current research work in this area include wind turbine blade geometric design and optimization, aerodynamics analysis, wind turbine blade structural design and dynamics analysis. Blade geometric design addresses the design parameters, including airfoils and their aerodynamic coefficients, attack angles, design tip speed ratio, design and/or rated wind speed, rotor diameter, blade aerodynamic shape with chord length and twist distributions, so that the blade achieves an optimum power performance. The geometry of the blade is an aerodynamic shape with nonlinear chord and twist distribution, which can be obtained based on the BEM theory with respect to gi ven aerofoil with known aerodynamic coefficients. In terms of blade aerodynamics analysis, there are four types of aerodynamic models which can be used to predict the aerodynamic ...
ANALYSIS AND OPTIMIZATION OF HORIZONTAL AXIS WIND TURBINE BLADE PROFILE
With new emerging technologies and innovations in energy sector future seems to be bright. But there's still few years for implementation of those technologies in commercial market. In time there is need to optimize existing technologies and increase their efficiency. Present research is one step towards that goal. This paper analyses and determine the optimum angle of attack at specific wind velocity for horizontal axis wind turbine. Analysis is done by setting wind speed to 10m/s (as this is average wind speed in most open area where wind turbines are placed) and by changing the angle of attack (6, 7, 8, 9 degrees) variation in different properties such as the power output, pressure distribution is determined. Pressure distributions as well as coefficient of lift to coefficient of drag ratio of different the airfoils are visualized and compared. Finite element analysis (FEA) and computational fluid dynamics (CFD) tools are used for analysis of wind turbine. The paper also discusses important parameters in design of wind turbine blade to maximize the efficiency. From the analysis and design optimization of wind turbine blade, it is found out that, at velocity of 10m/s, blade with angle of attack of 8 degree is optimum for harvesting power from wind. Thus, only optimizing blade angle of attack increases power, changing other parameters like material type,
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.
Optimal Performance of Horizontal Axis Wind Turbine for Low Wind Speed Regime
International journal of multidisciplinary and current research, 2014
The development of performance prediction is one of the most important aspects of the design of wind turbines. In this paper, a developed methodology is used to predict the optimal performance of the horizontal axis wind turbine in terms of the most critical parameters such as tip speed ratio, pitch angle, blade number and wind speed. Interesting generalized performance maps were conducted. Results show that low pitch is recommended for low wind speed regime. A range of (5 to 11) of tip speed ratio is found an optimum within the constraints considered. The interplay of cut in speed with the remaining parameters is also studied and their effect on power and torque are explored. Several results were presented for a three bladed wind turbine is it is preferred by many manufacturers and researchers.
Design and Analysis of Horizontal Axis Wind Turbine Blade
International Journal of Modern Trends in Engineering & Research, 2016
India has a vast source of renewable energy sector, in that wind energy contributes a major role. From the source of wind energy we cannot be able to attain maximum generation of power due to the operation wind turbine under European atmospheric condition. So there should be need to optimization of blade profiles which should be suited for low wind condition(India) that leads to increase in coefficient of performance. In this work varying of blade profiles taken in root, mid and tip section of blades are evaluated. According to properties of blade element momentum theory (BEMT) and computational work are developed for getting power curves for varying parameters such as tip speed ratio, lift and drag coefficient and main parameters like chord and twist distribution.
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.
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
Aerodynamic Performance Evaluation of a Wind Turbine Blade by Computational and Experimental Method
International journal of engineering research and technology, 2014
Lift and Drag forces along with the angle of attack are the important parameters in a wind turbine system. These parameters decide the efficiency of the wind turbine. In this paper an attempt is made to study the Lift and Drag forces in a wind turbine blade at various sections and the effect of angle of attack on these forces. In this paper NACA 4420 airfoil profile is considered for analysis of wind turbine blade. The wind turbine blade is modelled and several sections are created from root to tip. The Lift and Drag forces are calculated at different sections for angle of attack from 0° to 20° for low Reynolds number. The analysis showed that angle of attack of 6° has high Lift/Drag ratio. The CFD analysis is also carried out at various sections of blade at different angle of attack. The pressure and velocity distributions are also plotted. The airfoil NACA 4420 is analyzed based on computational fluid dynamics to identify its suitability for its application on wind turbine blades and good agreement is made between results.