ウエルズタービンに関する研究

（往復流型二重反転衝動タービンによる性能改善）

抄録

The Wells turbine has long been used as a secondary converter for wave energy conversion. In order to alleviate the stall problem of this turbine, the authors have proposed a Wells turbine with booster. In the present study, the counter-rotating impulse turbine for wave energy conversion, developed by M. E. McCormick of the United States Naval Academy, was proposed as a booster turbine. This turbine shown a better efficiency than an impulse turbine with single rotor in a previous numerical analysis. In this study, the Wells turbine with a counter-rotating impulse turbine was simulated to investigate the fluid dynamic performance by using CFD analysis. As a result, the stall characteristics of Wells turbine shown a little improvement by installing the counter-rotating impulse turbine. Further, it was found that, as a booster, the impulse turbine with single rotor is more efficiency than the counter-rotating impulse turbine.