2023 Fiscal Year Final Research Report
Prediction of material surface damage under cavitating flow
| Project/Area Number |
21K04512
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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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| Review Section |
Basic Section 24020:Marine engineering-related
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| Research Institution | Gunma University |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 混相流 / キャビテーション / 気泡 / 可視化計測 |
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| Outline of Final Research Achievements |
The paint peeling and material surface damages has been observed in cavitating flows. It has been not clearly yet although the cavitation erosion due to the bubble collapse causes these damages.
The high-speed water channel was used for experimental study. The painted contraction model was installed in the flow channel to generate cavitation. And the painted model was exposed in cavitaion and the peeling area and position are measured. The multi-point impact force measurement and image capture with high-speed camera were carried out in simultaneous and it was confirmed the cavitation collapse causes the paint peeling at material surface.
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| Free Research Field |
流体工学
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| Academic Significance and Societal Importance of the Research Achievements |
キャビテーションは液体を搬送する流体機械には少なからず発生する身近な現象である．キャビテーションの物理現象を調べるため，これまで気泡力学，流れの可視化などが実施されてきた．ここでは，工業分野で実際に問題となる物体表面に塗装した塗膜の剥離に注目した．可視化計測，力計測，塗膜試験など様々な試験を実施し，塗装の剥離はキャビテーションの崩壊に強く影響を受けることが判明した．
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