| Budget Amount *help |
¥24,700,000 (Direct Cost: ¥19,000,000、Indirect Cost: ¥5,700,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
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| Outline of Final Research Achievements |
In order to establish the theory of coupled phenomena where a wave propagates from a fluid to a solid or from a solid to a fluid, we have studied on the wave propagation phenomenon at the solid-liquid coupled interface by changing the solid surface conditions and the fluid. For solid to liquid case, we visualized the wave propagation in the water filled pipe and found that the generation of cavitation bubbles varies due to the wettability of the solid surface. For liquid to solid case, the impact force by bubble collapses in the water near the solid wall was inversely analyzed. Furthermore, we conducted cavitation-erosion tests with tensile loads on polymers expected as pump repair materials, and discussed the mechanism of failure and fracture.
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