2014 Fiscal Year Final Research Report
Study of underwater plasma under high pressure and thin and long growth of its plasma
| Project/Area Number |
24560236
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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 |
Thermal engineering
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| Research Institution | Ehime University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 液中プラズマ / 高圧力 / 発光スペクトル / 気泡 / 高速度カメラ |
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| Outline of Final Research Achievements |
To clarify a phenomenon of thin and long growth of high-pressure underwater plasma, three kinds of experiment were conducted, an experiment exchanging the conventional radio-frequency power supply for a microwave power supply, an experiment turning the electrode downward and an experiment using a plasma jet. Using the microwave power supply, the thin and long growth of plasma was not observed. Turning the electrode downward, the plasma often generated intermittently. Using the plasma jet, the plasma remained stably even at 1 MPa. A continuous spectrum was emitted from the underwater plasma at higher pressure than atmospheric pressure. Two images separated into H-alpha emission spectrum and the continuous spectrum were captured simultaneously using a high-speed camera. The intensity distribution of H-alpha emission spectrum was almost matched to the thin and long growth of the plasma, while that of the continuous spectra widened more from the thin and long growth of the plasma.
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| Free Research Field |
熱工学
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