CFD Analysis for Aerodynamic Performance Optimization of a Vertical Axis Helical Wind Turbine Using Rigid PVCHamza Outar, Hamza Ennadafy, Mustapha Jammoukh and Mohamed El KhailiE3S Web Conf., 601 (2025) 00101DOI: https://doi.org/10.1051/e3sconf/202560100101