(ISSN: 2349-2082)

International Journal For Ignited Minds
 Published Article
Analysis of Horizontal Axis Wind Turbine Using Blade Element Momentum Theory
Jaikrishna C R , Prof. A Raghunandan
Wind energy has been most viable source of renewable energy. A wind turbine is a device which extracts kinetic energy from the wind and converts it into mechanical energy later converts into electrical energy using generators. There are several methods to design the rotor blade of a wind turbine. The most popular amongst them are Blade Element Momentum Theory (BEMT), Vortex Lattice (VT) method and Reynolds-Averaged Navier-Stokes (RANS) method. The current project work is focused on Blade Element Momentum Theory (BEMT) in detail. Blade Element Momentum Theory is based on equating the aerodynamic forces with the momentum forces on a rotating annular stream tube passing through the wind turbine blade in both axial and tangential direction. In practice wind turbine blades are rotated by the wind and the torque is used to drive the generator. In causing the blades to rotate, wind also changes its direction which is the consequence of Newton’s second law. This forms the basis for Blade Element Momentum Theory (BEMT). The NACA series models are used for the wind turbine blade analysis. The aerofoil shaped cross section blades are found to be efficient at low Reynolds number. The commercial CFD software is be used to calculate the aerodynamic properties like lift co-efficient and drag co-efficient of the aerofoil models.
Blade Element Momentum Theory (BEMT), Wind Turbine, Turbine Blade, Lift co-efficient and Drag co-efficient.
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