| Budget Amount *help |
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
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| Outline of Final Research Achievements |
Regarding an airchamber of oscillating water column type wave energy converters, degree of scale effects between a small-scaled model and a full-scale model and their reasons were investigated. The study performed forced-oscillation tests in a still water and theoretical calculations based on the linear potential theory.
From a result, configurations of OWC models with large air pressure made the scale effect to be strong. However, the pressure and the variation were affected little by the homothetic ratio to set airchamber-volume of the models in both cases when it was considered or not that the atmosphere is always same for model scale and full scale. The things suggest that the scale effect due to the compressibility of the air affected to the results little. Besides, it was suggested that small phase difference between the pressure and the volume variation due to the air compressibility influenced the primary conversion performance of the OWC models little from the calculations.
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