The blockage ratio significantly influences the performance of a tidal stream turbine array by affecting the flow velocity and turbulence intensity experienced by the turbines. The blockage ratio is defined as the ratio of the swept area of the turbine(s) to the cross-sectional area of the channel or flow path. A high blockage ratio means that the turbines occupy a significant portion of the flow area, while a low blockage ratio means that the turbines occupy a relatively small portion of the flow area. A high blockage ratio can lead to an increase in flow velocity around the turbines, as the ....
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