Development of the third Darrieus blade of Sultan Wind Turbine for low wind speed (original) (raw)
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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.
Study of Functional and Airodynamic Design with Blade Parameters of NACA Series
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.
Power Optimization of NACA 0018 Airfoil Blade of Horizontal Axis Wind Turbine by CFD Analysis
International Journal of Energy Optimization and Engineering, 2020
The country or region where energy production is based on imported coal or oil will become more self-sufficient by using alternatives such as wind power. Electricity produced by the wind produces no CO2 emissions and therefore does not contribute to the greenhouse effect. Wind energy is relatively labour intensive and thus creates many jobs. Wind energy is the major alternative of conventional energy resources. A wind turbine transforms the kinetic energy in the wind to mechanical energy in a shaft and finally into electrical energy in a generator. The turbine blade is the most important component of any wind turbine. In this article is considered the single airfoil National Advisory Committee for Aeronautics (NACA) 0018 and a computational fluid dynamics (CFD) analysis is done at different blade angles 0º, 10º, 15º, and 30º with a wind velocity of 4 m/s. The analysis results show that a blade angle of 10º gives the best possible power and pressure and velocity distributions are plo...
The utilisation of wind energy in Indonesia is still low because the average wind speed in Indonesia is low. The design of the HAWT using a NACA airfoil which has a high C / Cd value and produces 500 W of power at wind speeds of 1 m/s up to 11 m/s. The research was conducted in 3 stages. First, the calculation stage to determine the radius, chord and twist of the blade. Second, the initial design stage of the blades is simulated to determine the NACA airfoil that is used and to know the coefficient of performance and power produced. Third, the stage of designing the 3D blade design. The design results show that the HAWT blades with NACA 5513 airfoil taperless type with the radius of 0.9 m on the airfoil simulation produced a higher Cl / Cd value with 152.73 when α = 4 °. In the Cp simulation for TSR, the Cp value reaches 20% in TSR 2 up to 10. Meanwhile, in the power wind speed (P-v) simulation, the power generated reaches 500 W at wind speeds of 11 m/s and angular velocity 263 up to 1000 rpm.
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.
Investigation of Aerodynamic Performances of NACA 0015 Wind Turbine Airfoil
Continuous rise of energy demand and need for cleaner environment emphasizes efficient conversion of energy from renewable sources. Wind energy is the most viable sources of renewable energy and it is environmentally friendly alternative energy sources. Energy extraction from wind energy is rapidly competitive to power production from other sources like coal. In this paper, Computational Fluid Dynamics (CFD) is used to predict the aerodynamic efficiency of wind turbine blades. A blade's aerodynamic efficiency is expressed in terms of its lift-to-drag ratio. The design and analysis of blades is one of the critical areas of wind turbine design. In this paper, a review of aerodynamics of the two dimensional NACA 0015 airfoil for vertical axis wind turbine (VAWT) is attempted. The main focus of this investigation is to analyze the flow behavior around the airfoil body and to calculate the performance coefficients at velocity 10.5 m/s and angle of attack from 0° to 20°. Comparisons of the CFD results with numerical predictions from the XFOIL result and NACA report showed a good agreement.
Performance analysis of a Darrieus-type wind turbine for a series of 4-digit NACA airfoils
2019
The purpose of this paper is to estimate the H-Darrieus wind turbine aerodynamic performance, aerodynamic blade loads and velocity profiles downstream behind the rotor. The wind turbine model is based on the rotor designed by McDonnell Aircraft Company. The model proposed here consists of three fixed straight blades; in the future this model is planned to be develop with controlled blades. The study was conducted using the unsteady Reynolds averaged Navier-Stokes (URANS) approach with the k-ω shear stress transport (SST) turbulence model. The numerical two-dimensional model was verified using two other independent aerodynamic approaches: the vortex model developed in Technical University of Denmark (DTU) and the extended version of the CFD code FLOWer at the University of Stuttgart (USTUTT). All utilized numerical codes gave similar result of the instantaneous aerodynamic blade loads. In addition, steady-state calculations for the applied airfoils were also made using the same numerical model as for the vertical-axis wind turbine (VAWT) to obtain lift and drag coefficients. The obtained values of lift and drag force coefficients, for a Reynolds number of 2.9 million, agree with the predictions of the experiment and XFoil over a wide range of angle of attack. The maximum rotor power coefficients are obtained at 0.5, which makes this impeller attractive from the point of view of further research. This work also addresses the issue of determining the aerodynamic performance of the rotor with various 4-digit NACA airfoils. The effect of two airfoil parameters, maximum airfoil thickness and maximum camber, on aerodynamic rotor performance is investigated. Research has shown that if this rotor were to work with fixed blades it is recommended to use the NACA 1418 airfoil instead of the original NACA 0018. 1 Introduction In 1931, G. J. M. Darrieus, a French aviation engineer, patented a wind turbine rotor capable of operating independently of the wind direction and in adverse weather conditions. The Darrieus wind turbine having a rotor with a vertical rotation axis is often used to convert wind energy into electric energy. The Darrieus wind turbine is composed of several curved blades attached to a vertical rotating shaft. In 1927, G. Darrieus also suggested other possible solutions for turbines with a vertical rotation axis. One of them was H-rotor (rotor in H pattern), also known or "H-bar". The rotor of this type consists of long straight blades which are usually fastened to the tower by means of horizontal struts. Giromill is another type of wind turbine with articulated and controlled straight blades to ensure maximization of energy extraction from the wind flow (Paraschivoiu,
The Aerodynamic Performance of the Small-Scale Wind Turbine Blade with NACA0012 Airfoil
CFD Letters
Small-scale wind turbine (SSWT) has been the subject of intensive research to complement its large-scale counterpart especially for usage in low wind speed regions. Two important issues that plague the development of the SSWT are its low in power coefficient especially due to the low Reynold’s number () condition that it’s operating in and the start-up difficulty that it faces. In this paper, the blade element momentum theory (BEMT) has been used to analyse a small-scale wind turbine having 3 m diameter. The airfoil used is the NACA 0012. The simplified experimental based equations have been used to determine the coefficient of lift, and coefficient of drag, of the airfoil. A developed MATLAB’s code applying the basic BEMT method is used. The results of aerodynamic performances including power coefficient, power and thrust are given as a function of wind speed, tip speed ratio (TSR) and Reynold’s number. It shows that at the minimum wind speed of 3 m/s, the wind turbine can have pow...
Design and Analysis of Archimedes Aero-Foil Wind Turbine Blade for Light and Moderate Wind Speeds
2018
the paper focused on Archimedes wind turbine adopted for household domestic electricity generation. The design and analysis of Archimedes aero-foil wind turbine (AAWT) will be described below. The wind turbine is a converter which converts the kinetic energy into rotational energy or mechanical energy then convert it into electrical energy. Wind turbines classified into two type’s i.e. Horizontal axis wind turbine (HAWTs) and Vertical axis wind turbine (VAWTs). Archimedes wind turbine (AWT) is a new type of Horizontal axis wind turbine comprising three circular blades which are wrapped around each other and then expanded. This special design ensures that more air is drawn into the turbine. AAWT is an enhanced form of AWT introducing aero-foil profile to the blade. The ultimate objective of this paper is the torque comparison of Archimedes aerofoil wind turbine with an Archimedes spiral wind turbine. The design of a new wind turbine blade has done by introducing NACA 6409 by using CR...
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 ...