| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Outline of Final Research Achievements |
The pressure on a cavitation collapse motion causes a vibration, a noise, and erosion to a fluid machinery. In this study, the suppression of a pressure in cavitation collapse motion was investigated with injecting HFE (Hydrofluoroether) liquid which is a kind of refrigerant liquid. A single bubble radial motion as the simplest model for cavitation was used in this study and the thermal effect on the bubble radial motion was experimentally discussed. The bubble growth with injecting HFE became larger than that of without it. On the other hand, the thermal effect of HFE had influence on bubble motion and the pressure on bubble collapse motion was suppressed.
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