| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
In the present study, methods of continuous producing of strong pressure waves in water are examined to develop a fundamental technology for removing marine creatures from hull. Underwater shock waves can be generated by collision of silicone film against water surface using a shock wave discharged from a high-pressure gas driven generator. The results suggest that there is a possibility of economic shock wave production, however it is hard to get strong pressures. On the other hand, underwater shock waves are obtained from self-collapse of small cavitation bubbles generated using a cavitation nozzle. It is found that this method can make up underwater shock waves easily and effectively, so there is an applicable possibility of removing marine creatures from hull.
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