investigated the effect of low Reynolds number on lift and drag for the wind turbine blade. Variations of pressure coefficient are plotted in form of contour for 1 ×105 Reynolds number. Kevadiya, Mayurkumar investigated NACA 4412 airfoil at various angles of attack from 0° to 12° using CFD analysis. Patel, Karna S., et al have obtained the drag and lift forces using CFD.
Some of the recent interesting work in the study of airfoils has been discussed below. Computational Fluid Dynamics (CFD) is a branch of fluid mechanics that uses numerical methods and algorithms to solve complex problems involving fluid flow. For the last three decades, Computational Fluid Dynamics (CFD) has fascinated researchers, as it is a fast, accurate and reliable method of analyzing the variation of hydrodynamic properties of the flow over and within a body. Since then, the wind tunnel, complex mathematics, and the computer have all played important roles in airfoil development.
From about 1912, airfoil development and research moved to the wind tunnel laboratories found at the University of Göttingen in Germany, the Royal Aircraft Factory in the United Kingdom, and the National Advisory Committee for Aeronautics (NACA) in the United States. The Wright brothers, many of the early designers used “eyeball engineering” in developing or copying the airfoil shape used on their airplanes. Airfoil is defined as the cross-section of a body that is placed in an airstream in order to generate useful aerodynamic force. What aviation pioneers discovered, which still holds true today, is that the most efficient way to do this is to use a curved, streamlined shape-the airfoil. Introduction In the early 1800s, Sir George Cayley discovered that a curved surface produced more lift than a similar sized flat plate.
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