二重翼列波力タービンの開発

（仕切り洞の影響）

抄録

We proposed the new type turbine, double rotor turbine, for OWC to improve the performances of starting characteristics and efficiency. The splitter plate of the double rotor turbine is the most important part that divides the flow into Wells or Impulse rotor. It is discussed the influence of the splitter duct length to the performances. The original length is based from the estimation of oncoming flow coefficient to each rotor. The length is gradually shorter and 0.75, 0.5,0.25 and 0 times of the original duct length. A torque is gradually decreased with the splitter duct shorter, but the variation is small. The starting characteristics is improved from the wells turbine at all duct length. The efficiency becomes maximum at 0.5 length. The variation of the efficiency with the flow rate is almost same to the duct length.