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2004 Fiscal Year Final Research Report Summary

Liquid Atomization Phenomena Based on Laminar-Turbulent Transition of a Radial Liquid Sheet

Research Project

Project/Area Number 14350096
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionOsaka City University

Principal Investigator

AZUMA Tsuneo  Osaka City Univ., Dept of Mech.Eng., Professor, 大学院工学研究科, 教授 (40047329)

Co-Investigator(Kenkyū-buntansha) KATOH K.  Osaka City Univ., Dept of Mech.Eng., Associate Professor, 大学院工学研究科, 助教授 (10177438)
WAKIMOTO T.  Osaka City Univ., Dept of Mech.Eng., Lecturer, 大学院工学研究科, 講師 (10254385)
Project Period (FY) 2002 – 2004
KeywordsRadial liquid sheet / Laminar-turbulent transition / Liquid atomization / Disturbance / Instability / Surface tension / Flow visualization
Research Abstract

Perforations caused by a laminar-tubulent transition of a radial liquid sheet are described. A liquid film produced by a impingement of liquid to a disk center spreads out radially on the disk and forms a radial liquid sheet outside the disk edge. The radial liquid sheet is unstable because of an internal velocity profile with an inflexional point. The instability causes a laminar-turbulent transition just outside the disk edge and the taransition leads to strong tubulence. Flow patterns completely depend on the frequency of perforations produced by the strong turbulence. The countless perforations lead to atomization of the liquid sheet. and no perforation results in a smooth liquid sheet. The perforation frequency relys on the configurations of streaky aggregations produced by fine waves after the transition. The wavy short aggregations induce the countless perforations and atomization immediately after the transition. The perforation frequency also relys on liquid properties and temperture of ambient gas. Chemical properties of the liquid sustaning a very thin liquid sheet like a soap bubble suppress the perforation and hot ambient air promotes the perforation.

  • Research Products

    (12 results)

All 2007 2006 2004

All Journal Article (12 results)

  • [Journal Article] 放射状自由液膜流れの乱流遷移による穿孔現象と穿孔の促進および抑制要因2007

    • Author(s)
      脇本辰郎, 東 恒雄
    • Journal Title

      日本機械学会論文集、B編 73巻

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 放射状液膜流れに形成されたトルミーン・シュリヒティング波群の挙動観察とシミュレーション2007

    • Author(s)
      丸山謙介, 東 恒雄
    • Journal Title

      日本機械学会論文集、B編 73-727

      Pages: 711-719

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Perforation of a Radial Liquid Sheet Caused by Laminar-Turbulent Transition and Improvement/ Suppression Factors of the Perforation2007

    • Author(s)
      WAKIMOTO, T., AZUMA, T.
    • Journal Title

      Trans.Japan Soc.Mech.Eng.(in Japanese) (To be published)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Observation and Simulation of a Tollmien-Schlichting Wave Packet Produced in a Radial Liquid Film Flow2007

    • Author(s)
      MARUYAMA, K., AZUMA, T.
    • Journal Title

      Trans.Japan Soc.Mech.Eng., Ser.B 73-727

      Pages: 711-719

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 管内流れの乱流遷移に及ぼす界面活性剤添加の影響2006

    • Author(s)
      荒賀浩一, 東 恒雄
    • Journal Title

      日本機械学会論文集、B編 72-717

      Pages: 1137-1145

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Growth of Disturbance Wave Induced by Radial Liquid Sheet Instability2006

    • Author(s)
      WAKIMOTO, T., AZUMA, T.
    • Journal Title

      JSME International Journal, Series B 49-4

      Pages: 1022-1026

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effect of Surfactant Additives on the Transition in Pipe Flow2006

    • Author(s)
      ARAGA, K., AZUMA, T.
    • Journal Title

      Trans.Japan Soc.Mech.Eng., Ser.B 72-717

      Pages: 1137-1145

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Growth of Disturbance Wave Induced by Radial Liquid Sheet Instability2006

    • Author(s)
      WAKIMOTO, T., AZUMA, T.
    • Journal Title

      JSME International Journal, Ser.B 49-4

      Pages: 1022-1026

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 放射状自由液膜流れの不安定性によるかく乱波の増幅2004

    • Author(s)
      脇本辰郎, 東恒雄
    • Journal Title

      日本機械学会論文集、B編 70-698

      Pages: 2567-2575

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Instability of Radial Liquid Sheet Flow2004

    • Author(s)
      WAKIMOTO, T., AZUMA, T.
    • Journal Title

      JSME International Journal, Series B 47-1

      Pages: 9-19

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Growth of Disturbance Wave Induced by Instability of a Radial Liquid Sheet2004

    • Author(s)
      WAKIMOTO, T., AZUMA, T.
    • Journal Title

      Trans.Japan Soc.Mech.Eng., Ser.B 70-698

      Pages: 2567-2575

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Instability of Radial Liquid Sheet Flow2004

    • Author(s)
      WAKIMOTO, T., AZUMA, T.
    • Journal Title

      JSME International Journal, Ser.B 47-1

      Pages: 9-19

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2008-05-27  

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