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It has been confirmed that the energy extraction rate is significantly improved by adopting the flow guide equipment which has curved fins on the circumference of a Savonius-type vertical turbine. In the real field, it would be required to install several turbines in a series, say parallel or tandem allocations, in order to obtain large amount of electric power from tidal currents. In this study, it was presumed that the installation site of the tidal power turbines was limited to the vicinity of coastal area along islands in Kurushima Straits. Under such limitations, it becomes important to know how to specially allocate a group of the turbines to maintain the energy extraction efficiency. In this study, the interaction effect among the specially allocated turbines was examined by both experimental and theoretical studies.

Efficient Allocations of Vertical Turbines for Tidal Power Extractions in the Sea around Islands near Kurushima Straits