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Study of underwater plasma under high pressure and thin and long growth of its plasma

Research Project

Project/Area Number 24560236
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Thermal engineering
Research InstitutionEhime University

Principal Investigator

MUKASA SHINOBU  愛媛大学, 理工学研究科, 講師 (20284391)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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 / 高周波 / プラズマジェット / マイクロ波
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.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (6 results)

All 2014 2013 2012

All Presentation (6 results)

  • [Presentation] 高圧下における水中プラズマ挙動に対する電源周波数の影響2014

    • Author(s)
      向笠忍,横山雄大,野村信福,豊田洋通
    • Organizer
      第51回日本伝熱シンポジウム
    • Place of Presentation
      アクトシティ浜松 コングレスセンター・静岡県・浜松市
    • Year and Date
      2014-05-21 – 2014-05-23
    • Related Report
      2014 Annual Research Report
  • [Presentation] 高圧下における水中プラズマ挙動に対する電源周波数の影響2014

    • Author(s)
      向笠忍,横山雄大,野村信福,豊田洋通
    • Organizer
      第51回日本伝熱シンポジウム
    • Place of Presentation
      浜松
    • Related Report
      2013 Research-status Report
  • [Presentation] 高圧下における高周波水中プラズマの発光と気泡の同時観察2013

    • Author(s)
      向笠忍,鎌田敦,野村信福,豊田洋通
    • Organizer
      第50回日本伝熱シンポジウム
    • Place of Presentation
      仙台
    • Related Report
      2013 Research-status Report 2012 Research-status Report
  • [Presentation] Synchronized Observation of Plasma Emissions and Bubbles Generated by Radio-Frequency Plasma in Water2013

    • Author(s)
      S. Mukasa, S. Nomura, H. Toyota
    • Organizer
      International Symposium on Plasma Chemistry (ISPC 21)
    • Place of Presentation
      Cairns, Australia
    • Related Report
      2013 Research-status Report
  • [Presentation] Synchronized Observation of Plasma Emissions and Bubbles Generated by Radio-Frequency Plasma in Water2013

    • Author(s)
      Shinobu Mukasa, Shinfuku Nomura, and Hiromichi Toyota
    • Organizer
      the 21st International Symposium on Plasma Chemistry
    • Place of Presentation
      Cairns, Australia
    • Related Report
      2012 Research-status Report
  • [Presentation] SIMULTANEOUS MEASUREMENT OF BUBBLE BEHAVIOR AND EMISSIONS OF BALMER SERIES IN RADIO-FREQUENCY PLASMA IN WATER BY A HIGH-SPEED CAMERA2012

    • Author(s)
      Shinobu Mukasa, Atsushi Kamada, Shinfuku Nomura and Hiromichi Toyota
    • Organizer
      3rd International Forum on Heat Transfer
    • Place of Presentation
      Nagasaki
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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