Enhancement of small wind turbine efficiency by using nozzle at entrance

Wind energy is among the most economical energy sources available nowadays. Renewables, such as wind and solar energy, have become key elements of the global energy mix. Wind energy can generate large amounts of electrical energy through wind turbines that exploit the movement of air. In this study, a horizontal-axis wind turbine was simulated to measure its productivity according to the weather conditions of the city of Kirkuk and increase its efficiency when supported by a nozzle. the wind speed equation was applied to the entrance of a wind turbine, and the effect of narrowing the section area was described by a nozzle in front of the entrance to the turbine through pressure and speed distribution lines. The effect of turbine efficiency was studied after supporting it with a nozzle and narrowing the section area. The system was simulated using the ANSYS 2024 simulation program (Fluid Flow CFX). The turbine was designed in the form of a uniformly loaded engine disc to find the most efficient turbine.