抄録
Development of tidal and sea currents power generation in Tsugaru strait have been conducted through 2-dimentional flume. To generate power effectively in slow current range, the device was designed as the water turbine combined with the contraction diffuser. Flow rate conditions were determined from observed velocity in Tsugaru strait scaled down by the Froude's law. Flow velocity at the upstream side and contracted model part were measured simultaneously. As a result, the velocity amplification effects due to contraction diffuser increased as main velocity becomes lower, however, in case of higher range velocity, these effects are decreased.
