Study of the aerodynamic structure of a horizontal axis NACA airfoil

In recent years the high consumption of energy leads to a deficiency in energy recovery current human needs. However facing economic problems due to large increases in fuel prices the world has moved towards the exploitation of new and renewable energies. These are inexhaustible and inexpensive compared to the energies of noble viewpoint of electric power generation. This strategy is based on the principle of sustainable development. Indeed these energies meet current needs without compromising the development of future generations. Also they use the natural elements such as biomass water sun and wind. If the sun wind and biogas energy are exploited only the wind belongs to the oldest tradition. Although for economic and technical reasons the use of wind energy is no longer as important as now. Although that energy clean finish it appears blatantly that electricity contributes greatly to environmental degradation and the depletion of nonrenewable resources. Therefore the steps to prepare a truly sustainable development is to increase the share of renewable resources for electricity generation.