サボニウス風車に関する数値計算 : 放出渦が運転特性に及ぼす影響

抄録

Flow fields around rotating Savonius rotors were simulated by solving 2-d incompressible Navier-Stokes equations. Results showed good agreement with experimental performance for the following points : torque grows weaker in inverse proportion to tip speed ratio ; gap of rotor buckets is effective in increasing maximum power. Simulated flows were visualized by relative velocity, vorticity, pressure, etc. The behavior of shed vortices were observed carefully, and it has been clarified that the shed vortices have a large effect on flow fields and the running performance.