Ahmed S. Shehata

TL;DR: In this paper, the authors proposed a novel system of ducted nozzle configuration around the Savonius rotor to increase the efficiency of the turbine, and the maximum power coefficient of the ducted turbine was increased by 78% compared to the conventional modified rotor.

TL;DR: In this article, the authors provide an updated and a comprehensive account of the state of the art research on Wells turbine and draw a roadmap for the contemporary challenges which may hinder future reliance on such systems in the renewable energy sector.

TL;DR: In this paper, the second law efficiency and entropy generation characteristics around different blades that are used in Wells turbine under oscillating flow conditions were investigated by using time-dependent CFD models of different NACA airfoils under sinusoidal flow boundary conditions.

TL;DR: In this article, the authors employed an entropy generation minimization method to examine the impact of the flow control method on the entropy generation characteristics around the turbine blade, which is performed using a time-dependent CFD model of isolated NACA airfoil, which refers to the turbine blades under sinusoidal flow boundary conditions, which emulates the actual operating conditions.

TL;DR: In this article, the authors used an entropy generation minimization method to examine the impact of the multi-suction slots method on the entropy generation characteristics around the turbine blade and found that the airfoil with three suction slots located at 40, 55% and 90% from leading edge in chord percentage gave the highest torque coefficient by 267% before the stall and 51% after the stall.