Analysis of Blade Aerodynamics and Obtaining the Forces of 1.5 KW Horizontal Axis Dual Rotor Wind Turbine Using the Ansys Fluent Software (original) (raw)
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Rentech Symposium Compendium Volume 4, 2014
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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.
THE AERODYNAMICS DESIGN OF HORIZONTAL AXIS WIND TURBINE BLADE USING COMPUTATIONAL FLUID DYNAMIC
This paper is aimed perform aerodynamic simulations around HAWT blades and design blades, small wind turbine produce 2kw of electricity. In this research using Gambit software for Design and ANSYS fluent for simulation to develop the system dynamic modeling. The data in the wind speed model can be obtained from experiment of wind applications in Libya support and implement this technology, to improve services in rural villages in Libya. The blade is made up of single airfoil. The chord length is variable throughout the blade. Chose NACA 4412 because life coefficient is high. Previous simulation kinds of airfoils ( NACA 4412, NACA 4415, NACA 63-006, NACA 24112, NACA 63-215 and NACA 1410.). Also lift and drag coefficient ratio (CL/CD) for NACA 4412 airfoil higher than NACA 4415 airfoil. So NACA 4412 good performance. In this study 2D airfoil (NACA 4412) CFD models is presented by ANSYS-FLUENT software, using the k-epsilon turbulent viscosity in this simulation, the lift, drag and moment coefficients were calculated for airfoil NACA 4412 at various angles of attack (0,5,10,15,20). Laminar to Turbulent flow structures near and far fields of the rotor region are characterized for average the wind speed of 5m/s and the rotor speed of 72 RPM. Meshing volume is done by ICEM software, the number of elements in the mesh used for simulations is (398436). The torque generated by the turbine is (30.3084 N.m) and the power generation of the turbine is 2kw. Keywords: horizontal axis wind turbine, Design blades, small wind turbine produce 2kw of electricity and simulation.
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One of the main achievements of the PLGrid Plus project is the implementation of new tools and services designed for the numerical prediction of the aerodynamic performance of wind energy turbines. An innovative and unique integration tool (Aero-T) is aiming at automating all stages (pre-, solution and post-processing) of the numerical simulation of the flow around wind turbine rotor blades using commercial CFD software based on the RANS approach and block-structured computational grids. The FINE/Turbo package (Numeca Int.) is applied in the structured grid generation process and solution phases, while the analysis of results is left to the Tecplot 360 (Tecplot Inc.) software. A demonstrator based on the NREL Phase VI rotor experiment (conducted at NASA Ames) is introduced to prove the excellent prediction capabilities of Aero-T.