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Numerical Modelling and Design of Horizontal-Axis Wind Turbine Blade for Low Wind Speed Regimes
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In this paper a set of 3 aerofoils of the NWT family designed by National Aerospace Laboratories (NAL) has been modified. The modified aerofoils are NWT 1001, NWT 2004, and NWT 2005. The main purpose of modifying is to shoot the low wind speed regimes hence to get more coefficient of lift and less coefficient of drag. These new modified aerofoils are numerically modeled, and are used to design a blade of 2.5m radius. Since aerofoils play a very important role in blade design and its enhancement in the power production of wind turbine in the low wind speed conditions makes the design unique. The comprehensive study of modified NWT aerofoils and its geometrical optimization are scrutinized to improve the coefficient of performance of the blade with the Reynolds number in the range of 250000. The Dual Evolutionary method is used to optimize the blade. The proposed design is very simple and more suitable for Indian low wind speed regimes.
Keywords
Modified NWT Aerofoils, Blade Design, Numerical Modeling, Computational Fluid Dynamics, Optimization.
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