Abstract
An influence of the aspect ratio on the Savonius rotor performance was investigated. Three-dimensional 3D numerical models of the classical Savonius rotor equipped in two semicircular buckets with an overlap gap and endplates were studied for different aspect ratios. The simulation results were verified against the experimental data and a blockage effect was taken into account. An increase in the power coefficient and the tip speed ratio for the maximal power coefficient with a growth in the rotor aspect ratio was observed. An effect of the wind displacement beyond the rotor was more intensive for lower aspect ratios.
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