Investigating the Effects of Air‐Jet on the Performance of a Hybrid Darrieus–Savonius Wind Turbine

The power performance of a hybrid three–bladed H‐Darrieus turbine and a two‐bladed Savonius turbine is analyzed by adding air‐jet deflectors. Aluminum is selected for the blade design due to its high strength, lightweight, and corrosion resistance. Experimental analyses were conducted using the developed prototype with and without an air jet in an open wind tunnel, measuring wind speeds ranging from 3 to 11 m/s using an anemometer. The turbine with and without air jets started rotating at 3.5 m/s and 4 m/s, respectively. Adding air‐jet mechanisms improved the power coefficient by 8.92% and torque coefficient by 21.5% compared to the hybrid turbine without air jets at a wind speed of 8 m/s. The maximum power coefficients with and without an air‐jet mechanism at an 8 m/s wind speed were 0.403 and 0.37, respectively. Using air‐jet deflectors at a 40° angle of inclination performed best in the four major wind directions, from wind speeds of 3 to 11 m/s. Introducing air‐jet mechanisms with proper positions enhances the power performance of the hybrid Darrieus–Savonius turbine, minimizing the effect of blade retarding.