MultiCraft International Journal of Engineering, Science and Technology Vol. 9, No. 2, 2017, pp. 46-60 INTERNATIONAL JOURNAL OF ENGINEERING, SCIENCE AND TECHNOLOGY www.ijest-ng.com www.ajol.info/index.php/ijest  2017 MultiCraft Limited. All rights reserved Analysis of horizontal axis wind turbine blade using CFD P.K. Nigam 1 *, Nitin Tenguria 1 , M.K. Pradhan 2 1 Department of Mechanical Engineering, Sagar Institute of Research & Technology, Bhopal, INDIA 2 Department of Mechanical Engineering, National Institute of Technology Bhopal, INDIA * Corresponding Author: e-mail: nigam.praveen@gmail.com, Tel +91-989-3316889 Abstract Blade is very essential part of HAWT (horizontal axis wind turbine). Forces for Lift and drag on the blade has an important role in the wind turbine performance. The main purpose of this work is to perform CFD analysis of a blade and airfoil of wind turbine using k- ϖ SST model. In this present study NACA 63 4 -221 airfoil profile is taken for the modeling and then analysis of the blade. The lift and drag forces are calculated for the blade at different AOA (angle of attack). For present work the blade length is taken 38.98 meter, which is a redesigned blade for VESTAS V82-1.65MW horizontal axis wind turbine blade. Results obtained from simulation are compared with the experimental work found in literature. Keywords: Horizontal Axis Wind Turbine, CFD, ANSYS, Airfoil DOI: http://dx.doi.org/10.4314/ijest.v9i2.5 1. Introduction Wind turbine rotor interacts with the wind and converts its kinetic energy into usable energy. Atmospheric turbulence produces important various types of aerodynamic forces on wind turbine blade, where turbulence is a primary source of aerodynamic forces on blade of wind turbine. Among the different aspects involved in rotor aerodynamics there are three different approaches that is be applied to analyze the flow around and downstream of a wind turbine that are: field testing, which is highly complex and expensive but provides accurate results; analytical and semi-empirical models, which are not universally reliable; and CFD, which offers the best way to direct measurements. 2. Literature Survey In the field of CFD, one early attempt to solve numerically the 3-D unsteady Navier-Stokes equations was carried out by Srinivasan and McCroskey (1988). In this paper, the authors used the unsteady thin layer approximation to compute hovering rotor blade flow fields. Also, rotor wake effects were accounted for by applying a correction to the geometric angle of attack of the blades. Later, a rather original approach was tried by Tuncer et al. (1990). In particular, the authors used a velocity-vorticity formulation of the Navier - Stokes equations containing a vorticity transport equation, which is solved in the viscous flow zone, and an integral equation for the velocity. Ekaterinaris et al. (1995) and Srinivasan et al. (1995) published an extensive survey of CFD results on oscillating NACA 0012 and 0015 airfoils when using different types of turbulence models. A quasi-steady approach to unsteady flows based on this methodology has been developed by Cebeci and Jang (1990). In a study of the time averaged pressure and load values, Devinant (2002) showed that the aerodynamic behavior of the airfoil can be greatly affected by the turbulence level, both quantitatively and qualitatively. In particular, a considerable increase in the lift coefficient with the turbulence level was observed. These results were confirmed experimentally by Amandolese and Szechenyi (2004). However, Sicot et al. (2006) found that these effects of turbulence level do not have a significant effect on the power and thrust coefficients of wind turbine.