抄録
Research has been conducted for carry out the tidal generation in the Tsugaru Current. However, the flow speed of Tsugaru Current is slower than the Kuroshio Current. The wind-lens technology is used to obtain a lot of energy. The brimmed diffusers for tidal generation are made to carry out the hydraulic experiments. The hydraulic experiments have shown that the brimmed diffusers obtain the speed increasing effect. Therefore we suggested the brimmed diffuser for tidal generation with integrated water turbine and power generation section supported by circumference. To investigate the velocity distribution for designing it, we carried out the wind tunnel experiments with brimmed diffusers. The wind tunnel experiments have shown that the diffuser length has significant influence on the speed increasing. And the longer the diffuser length, it more obtains the speed increasing effect. Also it obtains remarkable speed increasing effect near the wall. The brimmed height doesn't influence on the speed increasing effect clearly.
