International Journal of Research (IJR) e-ISSN: 2348-6848, p- ISSN: 2348-795X Volume 2, Issue 05, May 2015 Available at http://internationaljournalofresearch.org Available online:http://internationaljournalofresearch.org/ Page | 922 Aerodynamic investigation of horizontal axis wind turbine Prabhat Ranjan Mishra 1 *& Brijesh Patel 2* 1 Student,M.Tech,Turbomachinery, MATS school of Engineering and IT, Raipur 2 Asst. Professor , Department of Aeronotical Engineering ,, MATS school of Engineering and IT,Raipur *E-mail:prabhat.rjnmishra@gmai.com Abstract: Wind energy is renewable, pollution free and abundant in the earth and it can reduce the dependency on fossil fuel for energy requirement. Wind energy is different form of solar energy, and it will available till sun is available. Large amount of wind energy can be continuously generated from wind source, that’s why large horizontal axis wind turbines are being installed to produce power, for more power extraction aerodynamic parameters associated with blade geometry and the material for blade are important. so in this paper we will discuss about the various aerodynamic characteristics which is important in terms of large power extraction with less material and cost expenditure. Keywords: HAWT; aerodynamics; airfoils Introduction Wind energy power production are directly depends upon the interaction held between the rotor and the balde. In a horizontal axis wind turbine the mean power output and mean loads are determined by the aerodynamic forcesgenerated by the mean wind. Practical horizontal axis wind turbine designs use airfoils to transform the kinetic energy in the wind into useful energy. Airfoil nomenclature Figure 1 shows airfoil nomenclature and its terminology is as following: Chord length – length from the LE to the TE of a wing cross section that is parallel to the vertical axis of symmetry Mean camber line – line halfway between the upper and lower surfaces Leading edge (LE) is the front most point on the mean camber line, Trailing edge (TE) is the most rearward point on mean camber line Camber – maximum distance between the mean camber line and the chord line, measured perpendicular to the chord line - 0 camber or uncambered means the airfoil is symmetric above and below the chord line Thickness – distance between upper surface and lower surface measured perpendicular to the mean camber line [1]. Fig.1. Airfoil nomenclature