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Measurement of density distribution of droplets by laser-induced breakdown

Research Project

Project/Area Number 25420138
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Fluid engineering
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Yashiro Hidehiko  国立研究開発法人産業技術総合研究所, 電子光技術研究部門, 主任研究員 (30358197)

Co-Investigator(Kenkyū-buntansha) KAKEHATA Masayuki  産業技術総合研究所, 電子光技術研究部門, 主任研究員 (70356757)
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywordsレーザー生成プラズマ / レーザー / エアロゾル / 液滴 / ブレークダウン / レーザー誘起ブレークダウン / 数密度測定 / 多点同時測定 / 数密度分布 / 絶対数密度測定
Outline of Final Research Achievements

Laser-induced breakdown method is the only way that can measure the absolute number density of droplets in aerosol. However, this measurement method requires a large number of laser shots. Moreover, enormous measurement points are required for a spatial density distribution of aerosol. A technique of the density measurements at multiple points simultaneously is essential way to be shortened the measurement time for density distribution. A laser beam is divided into 6x6 beams by a DOE (Diffractive Optical Elements) and focused by a plano-convex lens on lattice-shape. Each breakdown at the multiple measurement points is observed by a camera system. Actual density distribution of aerosol ejected from a spray nozzle is observed plausibly by this system. This measurement system reduces the measurement time for the density distribution of droplets in an aerosol effectively.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (5 results)

All 2014 2013

All Journal Article (2 results) (of which Acknowledgement Compliant: 1 results,  Peer Reviewed: 1 results) Presentation (3 results)

  • [Journal Article] Improvement spatial resolution for density diagnostic of droplets in an aerosol by laser-induced breakdown2014

    • Author(s)
      H.Yashiro and M.Kakehata
    • Journal Title

      Proc. LISBON 2014

      Volume: 1

    • Related Report
      2014 Research-status Report
    • Acknowledgement Compliant
  • [Journal Article] Temporal and Spatial Effects of Ablation Plume on Number Density Distribution of Droplets in an Aerosol Measured by Laser-induced Breakdown2013

    • Author(s)
      H.Yashiro, M.Kakehata
    • Journal Title

      Proceedings of The 16th Annual Conference of ILASS-Asia

      Volume: 1 Pages: 92-96

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] Improvement spatial resolution for density diagnostic of droplets in an aerosol by laser-induced breakdown2014

    • Author(s)
      H.Yashiro and M.Kakehata
    • Organizer
      International Symposium on Applications of Laser Techniques to Fluid Mechanics (LISBON 2014)
    • Place of Presentation
      Lisbon Portugal
    • Year and Date
      2014-06-07 – 2014-06-10
    • Related Report
      2014 Research-status Report
  • [Presentation] Improvement spatial resolution for density diagnostic of droplets in an aerosol by laser-induced breakdown method2014

    • Author(s)
      H.Yashiro, M.Kakehata
    • Organizer
      Lisbon 17th 2014 International Symposium On Applications of Laser Techniques to Fluid Mechanics
    • Place of Presentation
      GULBENKIAN Musium, Lisbon, Portugal
    • Related Report
      2013 Research-status Report
  • [Presentation] Temporal and Spatial Effects of Ablation Plume on Number Density Distribution of Droplets in an Aerosol Measured by Laser-induced Breakdown2013

    • Author(s)
      H.Yashiro, M.Kakehata
    • Organizer
      The 16th Annual Conference of ILASS-Asia
    • Place of Presentation
      長崎県長崎市長崎大学坂本地区キャンパス
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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