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Fundamental Study on Micro-Actuator Utilizing Rapid Boiling

Research Project

Project/Area Number 08455104
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Thermal engineering
Research InstitutionYokohama National University

Principal Investigator

IIDA Yoshihiro  Yokohama National Univ., Faculty of Engineering, Professor, 工学部, 教授 (90005299)

Co-Investigator(Kenkyū-buntansha) TAKASHIMA Takeo  Yokohama National Univ., Faculty of Engineering, Asistant, 工学部, 助手 (40197091)
OKUYAMA Kunito  Yokohama National Univ., Graduate school of Engineering, Ass.Professor, 工学研究科, 助教授 (60204153)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,100,000 (Direct Cost: ¥7,100,000)
Fiscal Year 1997: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1996: ¥5,200,000 (Direct Cost: ¥5,200,000)
KeywordsMicro Actuator / Boiling Heat Transfer / Rapid Boiling / Spontaneous Nucleation / Small Film Heater / Unsteady State Boiling / Bubble Behavior / Evaporation / パルス加熱 / 揺らぎ核生成 / 急速蒸発 / マイクロアクチェエーター
Research Abstract

The objective of this study is to reveal the boiling bubble behavior generated on a very small film heater or a fine wire immersed in pure liquids by heating them rapidly, since the behaviors are necessary for understanding and designing the micro-actuator which utilizes the liquid-gas phase change resulted from rapid boiling on the heater. A film heater whose dimensions were 0.1mm in width and 0.25mm in length was heated pulsewise by a direct current with a heating rate up to about 10^9K/s at the maximum and the temperature at the inception of boiling, the variation of nucleated bubble numbers, the aggragation process of tiny bubbles, the growth process and the collapse process of a bubble were measured and analyzed as well as the heat transfer behavior. Those succeeding the spontaneous nucleation were also examined. Thus, the bubble dynamics and the heat transfer characteristics when a very small film heater was heated rapidly were wholy revealed.
Further, with the aid of the above experimental results, the superheated liquid layr evaporation model was presented to explain theoretically the heat transfer and bubble behavior preceded by the rapid bubble nucleation on a heater. Experimental results as well as theoreticals showed that the maximum bubble volume decrased with the increase of the heating rate.
A series of observation experiments were carried out with a fine wire of 0.05mm in diameter for a very wide range of heating rate and it was shown that the bubble generation and collapse behaviors were divided roughly into 3 types in accordance with heating rate. Applicability of each type for a micro-actuator was discussed. Bubble nucleation in binary liquid mixtures was studied experimentally, since liquid mixtures was used instead of pure liquid in real micro-actuator.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] 飯田嘉宏 ほか2名: "高速加熱される伝熱面上の揺らぎ核生成時の沸騰伝熱挙動(第1報)" 日本機械学会論文集 B編. 63. 3048-3054 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Okuyama,K.ほか1名: "Boiling Bubble Behavior and Heat Transfer Succeeding Spontaneous Nucleation on a Film Heater" Proc.of the 11th Int.Heat Transf.Conf.,. 2. 527-532 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 飯田嘉宏,ほか2名: "高速加熱される平面伝熱面上の揺らぎ核生成後の急速蒸発過程" 第34回日本伝熱シンポジウム講演論文集. (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 飯田嘉宏,ほか3名: "パルス加熱される金属細線上の気泡生成・消滅挙動(広い加熱速度範囲における観察結果)" 第35回日本伝熱シンポジウム講演論文集. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 奥山邦人,ほか2名: "10^9K/sに至る平面伝熱面超高速加熱時の蒸気生成挙動" 日本機械学会熱工学シンポジウム講演論文集. 85-88 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 奥山邦人,ほか3名: "高速加熱法による二成分液体の過熱限界に関する実験的研究" 日本機械学会熱工学講演会講演論文集. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshihiro Iida, et al.: "Heat Transfer during Boiling Initiated by Fluctuation Nucleation on a Platinum Film Rapidly Heated to the Limit of Liquid Superheat (1st.Report, Experiment under Atmospheric Pressure Condition)" Trans.JSME. Vol.63, No.613. 3048-3054 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kunio Okuyama and Yoshihiro Iida: "Boiling Bubble Behavior and Heat Transfer Succeeding Spontaneous Nucleation on a Film Heater" Heat Transfer 1998, Proceedings of 11th IHTC. Vol.2. 527-532 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshihiro Iida et al.: "Rapid Evaporation Process after Fluctustion Nucleation on a Film Rapidly Heated to the Limit of Liquid Superheat" Proc.of the 34th National Heat Transfer Symposium. Vol.3. 795-796 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yoshihiro Iida et al.: "Vapor Generation and collapse Behavior on a Fine Wire Subjected to Pulsewise Heating (Experimental Results in a Wide Range of Heating Rate)" Proc.of the 35th National Heat Transfer Symposium. Vol.1. 177-178 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kunito Okuyama et al.: "Vapor Generation Behavior on a Film Heater Subjected to Rapid Heating over 10^9K/s" Proc.of the 11th Thermal Engineering Symposium of JSME. 85-88 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kunito Okuyama et al.: "Superheat Limits of Binary Liquid Mixtures Subjected to Rapid Heating" Proc.of the Thermal Engineering Conf.of JSME. (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 飯田嘉宏・ほか: "極微小平面伝熱面の超高速加熱時における沸騰核生成(揺らぎ核生成による気泡発生に対する系圧力の影響)" 日本機械学会論文集. 62-600. 3095-3101 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] Iida,Y.etal.: "Effect of Ambient Pressure on the Dynamics of Bubble Formation by Fluctuation Nucleation on a Film Rapidly Heated to the Limit of Liquid Supu" Proc.of the Third KSME-JSME Theuual Eug.Covf.,. I. 373-382 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 飯田嘉宏・ほか: "高速加熱される伝熱面上の揺らぎ核生成後の沸騰伝熱挙動(第1報 大気圧下における実験)" 日本機械学会論文集. 63-613. 146-152 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Okuyama,K.ほか: "Boiling Bubble Behavior and Heat Transfer Succeeding Spontaneous Nucleation on a Film Heater." Proc.of the 11th.lnt.Heat Transfer Kenference. (accepted). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 飯田嘉宏・ほか: "高速加熱される平面伝熱面上の揺らぎ核生成後の急速蒸発過程" 第34回日本伝熱シンポジウム講演論文集. III. 795-796 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 飯田嘉宏・ほか: "パルス加熱される金属細線上の蒸気生成・消滅挙動(広い加熱速度範囲における観察結果)" 第35回日本伝熱シンポジウム講演論文集. (発表予定).

    • Related Report
      1997 Annual Research Report
  • [Publications] 飯田嘉宏ほか: "極微小平面伝熱面の超高速加熱時における沸騰核生成(揺らぎ核生成による気泡発生に対する系圧力の影響)" 日本機械学会論文集. 62-600. 3095-3101 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Iida,Y.: "Effect on Ambient Pressure on the Dynamics of Bubble Formation by Fluctuation Nucleation on a Film Rapidly Heated to the Limit of Liquid Superheat" Proc.of the Third KSME-JSME Thermal Engng.,Conf.,. I. 373-382 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Iida,Y.: "Rapid Eraporation Process after Fluctuation Nucleation on a Film Rapidly Heated to the Limit of Liquid Superheat" Proc.of the 11th.lut.Heat Trausfer Conf.(発売予定).

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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