Showing papers on "Savonius wind turbine published in 2022"

Wind Tunnel Experiments to Estimate the Performance of a Novel Arc-Elliptical-Bladed Savonius Wind Rotor

Abstract: The gradually exhausting non-renewable energy resources, pollution from conventional fuel resources and alarming global warming have sparked the interest in developing renewable technologies for power generation. In that connection, the vertical-axis drag-based Savonius wind turbine/rotor is an exciting prospect to harness the free energy available in the wind and can be deployed in remote areas having no electricity grids. The present study aims at designing and developing a vertical-axis Savonius wind rotor, and its subsequent testing in a wind tunnel. The key parameters affecting a Savonius rotor’s output are its blade shape, aspect ratio, overlap ratio and blade number. Considering the various aspects of blade design reported in the literature, a novel arc-elliptical-bladed Savonius wind rotor has been developed. The overlap ratio and aspect ratio are chosen to be 0.15 and 1.1:1, respectively. The testing of the rotor has been conducted in a subsonic wind tunnel under different loading conditions. The power coefficients are estimated for a range of tip-speed ratios. Further, its output characteristics have been compared with conventional semicircular-bladed Savonius rotor. The experiments reveal an improvement of 37% for arc-elliptical-bladed rotor as compared to semicircular-bladed rotor.