案内羽根付ダリウス型波力タービンの数値解析

抄録

Darrieus type turbines with guide vanes 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, turbine has symmetric two guide vanes near the rotor. Main parameters of guide vane are camber, setting angle and position. Four blades of rotor are NACA0018 and chord length is 17.2% of diameter. The following are conclusions of analysis. Suitable guide vanes increase efficiency under the oscillating flow. However, it can't increase maximum efficiency under the steady flow. Large gap of vane and rotor can't increase efficiency.