Not only the Europe but every continent is facing challenges to overcome energy crises and to provide better solutions. This research work is also the part of one of the most challenging tasks of European Commission-2020 Climate & Energy which undertook at Fraunhofer institute of Wind Energy and Energy Systems Technology (IWES). This is a downwind turbine project which is 3D unsteady aerodynamical experiment ( took at NASA AMES wind tunnel 2001) of horizontal axis wind turbine of phase VI baseline case of NREL USA and motivation of work package WP4 of IEA (International Energy Agency)-task...