Grid generation is done by ANSYS ICEM CFD algorithm. All the design variable and the objective functions are normalized between 0 and 1 based on their maximum and minimum values in order to determine the response surface. These response surfaces are obtained between design variable (Re, and Airfoil AF) and objective functions (CL and CD ) for each airfoil profile. The response surfaces were fit using standard least-square regression with quadratic polynomial using JMP. The CFD data of the 15 simulated cases for each airfoil were used to generate a response surface. We considered three Reynolds number Re = 68,421, Re = 479,210, Re = 958,422 and a range of 00 to 120 angle of attack (). These vertices are connected with a smooth curve creating the surface of the airfoil. These airfoil are created from the set of vertices generated from the University of Illinois at Urbana Champagne (UIUC) airfoil database. S809 Airfoil profileįor the comparison of the CFD data with the experimental results S809 airfoil is also considered. Six different airfoil is selected for this work based on the previous work and literature. In this work airfoils are considered as a discrete variable and with the help of MATLAB we successfully find out a single airfoil that gives the optimum aerodynamic performance in a wide range of design condition. Huque and Zemmouri has showed different optimum condition for six different airfoil but they did not consider airfoils as a variable. For this purpose six different airfoil is selected and different aerodynamic simulation is performed. In this paper optimization of airfoil is focused. The taper, twist and airfoil characteristics should all be combined in order to give the best possible energy capture for the rotor speed and site conditions. To gain efficiency the blade should have both twisted and tapered. That may have modifications in order to improve performance for special application and wind conditions. In recent years development of wind turbine blade airfoil has been ongoing. Most wind turbine blades were adaptations of airfoils developed for aircraft and were not optimized for wind turbine uses. Holten and Gyatt showed that using small flap in horizontal axis wind turbine could increase the output power.
WIND TURBINE AIRFOIL HOW TO
At present numerous research is focused on how to improve the The traditional wind turbine blade is using the aviation airfoil. The aerodynamic of general aviation airfoil has been fully studied in last few decades. And the design of the blade completely depends on the selection of airfoil. Seeking a low cost, highly efficient blade design method has been an important problem required to be solved during wind turbine development. Total performance, power output and efficiency depends on the design of the blade. Blade is the most crucial part of wind turbine. The field of wind energy start to develop in 1970s after the oil crisis, with a large infusion of research money in the United States, Denmark and Germany to fine alternative resource of energy especially wind energy. Keywords Wind turbine, CFD, optimization, response surfaceĪccording to the US Department of Energy the combustion of fossil fuels results in a net increase ofġ0.65 billion ton of atmospheric carbon dioxide every year.
WIND TURBINE AIRFOIL CODE
Statistical code JMP was used to perform the response surface and finally a discrete optimization technique was developed to find an optimal airfoil that gives satisfactory performance in a wide range of design conditions.
WIND TURBINE AIRFOIL SOFTWARE
Commercial software ANSYS Fluent was used to evaluate the lift coefficient (CL) and drag coefficient (CD) at different angle of attack () and three different Reynolds number (Re). Based on the data of National Renewable Energy Laboratory (NREL) phase VI wind turbine rotor, six different airfoil (NACA xx-xxxx, Fx and E Series) were used to calculate different aerodynamic loads (lift & drag) and their effects. A multi-objective response surface technique with computational fluid dynamics (CFD) was performed on two dimensional wind turbine blade airfoil. This work is focused on optimization of wind turbine blade profile by two dimensional flow field analysis. Prairie View A&M University TX 77446, USA Kommalapati 2,3ġDepartment of Mechanical Engineering 2Center for Energy and Environmental Sustainability 3Department of Civil and Environmental Engineering Hossain1,2, Ghizlane Zemmouri 1,2, Ziaul Huque1,2, Raghava R. Discrete Optimization of Wind Turbine Blade Airfoil
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