2017 Fiscal Year Final Research Report
Dynamics of a vapor/refrigerant bubble to suppress collapse pressure
| Project/Area Number |
15K05782
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Gunma University |
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Principal Investigator |
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| Research Collaborator |
ISHIMA Tsuneaki
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 混相流 / 気泡 / 可視化 / 熱・物質輸送 |
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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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| Free Research Field |
流体工学
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