2018 Fiscal Year Final Research Report
Fundamental study of pulsed arc discharge in supercritical fluid for constructing an environment-friendly technology
| Project/Area Number |
16K18062
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Power engineering/Power conversion/Electric machinery
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| Research Institution | Nagasaki University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Keywords | 超臨界流体 / パルスパワー / アーク放電 |
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| Outline of Final Research Achievements |
The basic characteristics of pulsed arc discharge plasma generated in supercritical carbon dioxide were studied aiming the growing utilization of supercritical fluid application technology. The analyses of pulsed voltage/current waveforms, spectroscopic measurements, statistical characteristics of breakdown voltage, and laser-shadowgraph images were performed to elucidate the pulsed discharge phenomena in supercritical carbon dioxide. The unique discharge behavior appears in supercritical phase in comparison with gas phase through a series of experiments.
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| Free Research Field |
高電圧パルスパワー工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究では，化学工学の分野で抽出，分解などの環境にやさしい溶媒として実績のある超臨界流体の応用分野を広げることを目標として，超臨界二酸化炭素中のパルスアーク放電の基礎特性について研究を行った．超臨界流体の特徴が一番大きく表れる臨界点近傍の条件でプラズマ温度が減少するなどの特異な特性を見出すことができた．このことは放電工学の観点から非常に重要な知見であると考えられる．また，放電プラズマから強力な衝撃波の伝搬の様子が観測され，材料合成や抽出などの応用を考えた際にも重要な現象になると考えられる．
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