Abstract
A unique twin impulse turbine has been proposed in order to enhance the performance of wave energy plant. This turbine system uses two impulse turbines to make a unidirectional flow and their flow direction in the plant is different each other. The one is suitable to inhalation in the plant and another one is for exhalation. However, characteristics of the twin turbine have not been clarified to date. The performances of a unidirectional impulse turbine under steady flow conditions were investigated experimentally by using a wind tunnel with large piston/cylinder in this study. Then, efficiency of the twin impulse turbine has been estimated by a quasi-steady analysis using experimental results.
