Abstract
Cross flow turbines for the Oscillating water column were simulated by LES analysis. The equations are discretized by Finite volume method for space and Fractional step method for time. In this study, blade number is 24 and chord length is 15% of diameter. Shapes of duct are point symmetry. Important parameters of ducts are curvature and position of tongue. The following are results of analysis. Gentle curvature of tongue decrease pressure drop and improve turbine efficiency. Maximum efficiency in steady flow was 72%. Starting torque performances were very good in every case.
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