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Study on ultra-low heat flux loop heat pipe based on understanding of a nucleate boiling phenomena in a porous medium

Research Project

Project/Area Number 20K14956
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 24010:Aerospace engineering-related
Research InstitutionJapan Aerospace EXploration Agency

Principal Investigator

Odagiri Kimihide  国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 特任助教 (50866481)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywords伝熱工学 / 多孔質体 / 核沸騰 / 気液二相流 / 低熱流束 / ループヒートパイプ / 多孔体核沸騰 / 気液相変化 / キャピラリーポンプループ
Outline of Research at the Start

熱的リソースが限られる遠方天体探査においては、分散して存在する低発熱密度機器の熱エネルギー有効利用がミッション成立に必要不可欠である。本研究の目的は、毛細管駆動熱流動系における核沸騰素過程および濡れ制御特性を明らかにし、将来宇宙ミッションを高次に実現する「超低熱流束ループヒートパイプ設計理論」を確立することである。本研究は、マイクロスケール多孔体内の核生成挙動および核沸騰気液界面挙動の可視観察、多孔体界面熱輸送を含む熱流動解析によって研究目的を達成する。さらに微細構造表面の濡れ制御により、低熱流束条件において核沸騰熱伝達を促進する構造を明らかにする。

Outline of Final Research Achievements

The purposes of this study are (a) To clarify nucleate boiling phenomena and the effect of wettability control in a capillary porous medium, and (b) To establish a low heat flux loop heat pipe (LHP) technology that operates under heat flux conditions of 0.01 W/cm2 class. By using the microscale infrared/visible observation system and the microscale high-speed observation system, the nucleate boiling phenomena in a porous medium was observed. The effect of wettability of the heating plate on the heat transfer coefficient and the geometry of the porous media that enables high heat transfer performance under low heat flux conditions were clarified. Based on them, a low heat flux LHP was designed, fabricated, and tested. The operation at a heat flux of 0.02 W/cm2 which is extremely low heat flux conditions compared to conventional LHPs was successfully demonstrated.

Academic Significance and Societal Importance of the Research Achievements

蒸発器内部で生じる毛細管力駆動の多孔質熱流動現象は,LHP性能に大きく影響を与えるため,そのメカニズムを明らかにすることは重要である。特に知見の不足していた,濡れ性制御が熱伝達係数に与える影響,低熱流束条件での高熱伝達構造,気泡核生成過程について可視化によって理解を深めた点で,本研究成果は学術的意義がある。また高効率な低熱流束LHPの技術実証は,将来の宇宙科学・探査ミッションの熱設計自由度向上に資する。さらに本成果は宇宙機および地上用機器の熱制御技術に幅広く活用することが可能であり,社会的意義は大きい。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (24 results)

All 2022 2021 2020

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (21 results) (of which Int'l Joint Research: 8 results)

  • [Journal Article] Supercritical Startup Experiment of Cryogenic Loop Heat Pipe for Deep Space Mission2022

    • Author(s)
      T. Yokouchi, X. Chang, K. Odagiri, H. Nagano, H. Ogawa, and H. Nagai
    • Journal Title

      51th International Conference on Environmental Systems (Accepted)

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of cryogenic loop heat pipe for deep space mission2021

    • Author(s)
      X. Chang, T. Adachi, K. Odagiri, H. Ogawa, and H. Nagai
    • Journal Title

      50th International Conference on Environmental Systems

      Volume: -

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Experimental investigation on thermal characteristics of a capillary pumped loop with different reservoir locations2020

    • Author(s)
      Odagiri Kimihide、Nagano Hosei、Ogawa Hiroyuki
    • Journal Title

      International Journal of Heat and Mass Transfer

      Volume: 158 Pages: 119964-119964

    • DOI

      10.1016/j.ijheatmasstransfer.2020.119964

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] Effect of Evaporator Preheating on Startup Characteristics of Capillary Pumped Loop2022

    • Author(s)
      M. Hirata, K. Odagiri, and H. Ogawa
    • Organizer
      33rd International Symposium on Space Technology and Science
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] マルチエバポレータ型極低温ループヒートパイプの熱輸送モデル構築と特性評価2022

    • Author(s)
      小田切公秀,常新雨, 永井大樹, 小川博之
    • Organizer
      第59回日本伝熱シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 宇宙用観測機器の冷却を目指した極低温ループヒートパイプに関する研究(超臨界起動及びその動作特性)2022

    • Author(s)
      横内岳史, 常新雨, 小田切公秀, 長野方星, 小川博之, 永井大樹
    • Organizer
      第59回日本伝熱シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 将来の宇宙科学ミッションに向けた極低温熱制御デバイスの研究2022

    • Author(s)
      小田切公秀,西城大,秋月祐樹,澤田健一郎,金城富宏,篠崎慶亮,小川博之,上野藍,長野方星,常新雨,永井大樹
    • Organizer
      第22回宇宙科学シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Effect of Evaporator Preheating on Startup Behavior of Capillary Pumped Loop2021

    • Author(s)
      M. Hirata, K. Odagiri, and H. Ogawa
    • Organizer
      18th International Conference on Flow Dynamics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental and theoretical study of liquid-vapor interface behavior on a porous structure for enhancing performance of Loop heat pipe2021

    • Author(s)
      Y. Nakatsugawa, K. Odagiri, A. Ueno, and H. Nagano
    • Organizer
      2nd Asian Conference on Thermal Sciences
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Thermo-fluid behavior in a micro-grooved evaporator of LHP based on microscale infrared / visible observations2021

    • Author(s)
      Y. Nakatsugawa, K. Odagiri, and H. Nagano
    • Organizer
      Joint 20th International Heat Pipe Conference and 14th International Heat Pipe Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characteristics of thermo-fluid behavior in a micro-grooved evaporator of Loop heat pipe based on microscale infrared / visible observations and modeling2021

    • Author(s)
      Y. Nakatsugawa, A. Ueno, H. Nagano, and K. Odagiri
    • Organizer
      15th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 極低温キャピラリーポンプループの概念検討2021

    • Author(s)
      秋月祐樹,平田大,小田切公秀,小川博之
    • Organizer
      令和3年度宇宙航行の力学シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 宇宙用マルチエバポレータ型極低温ループヒートパイプの設計検討2021

    • Author(s)
      小田切公秀,常新雨, 永井大樹, 小川博之
    • Organizer
      令和3年度宇宙航行の力学シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 重力アシスト型極低温ループヒートパイプの起動試験2021

    • Author(s)
      横内岳史, 常新雨, 小田切公秀, 長野方星, 小川博之, 永井大樹
    • Organizer
      令和3年度宇宙航行の力学シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 蒸発器予熱がCapillary Pumped Loopの起動挙動に与える影響2021

    • Author(s)
      平田大, 小田切公秀, 小川博之
    • Organizer
      第65回宇宙科学技術連合講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] マイクロスケール可視観察に基づく多孔体内気液界面挙動の理解(三相界線増加と濡れ性改善が蒸発熱伝達に及ぼす影響)2021

    • Author(s)
      中津川克久, 小田切公秀, 上野 藍, 長野方星
    • Organizer
      日本機械学会2021年度年次大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高熱流束LHP蒸発器開発に向けた多孔体内気液二相熱流動現象の観察2021

    • Author(s)
      中津川克久, 小田切公秀, 上野 藍, 長野方星
    • Organizer
      混相流シンポジウム2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Capillary Pumped Loopの起動改善に関する実験的研究2021

    • Author(s)
      平田大, 小田切公秀, 小川博之
    • Organizer
      第58回日本伝熱シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 宇宙機用極低温ループヒートパイプの設計試作とその評価2021

    • Author(s)
      常新雨, 小田切公秀, 安達拓矢, 小川博之, 永井大樹
    • Organizer
      第58回日本伝熱シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 極低温における熱制御2021

    • Author(s)
      永井大樹, 常新雨, 安達拓矢, 小川博之, 篠崎慶亮, 澤田健一郎, 西城大, 金城富宏, 小田切公秀, 秋月祐樹, 長野方星, 上野藍
    • Organizer
      第21回宇宙科学シンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] Design study of cryogenic loop heat pipe for space application2020

    • Author(s)
      X. Chang, T. Adachi, K. Odagiri, H. Ogawa, and H. Nagai
    • Organizer
      17th International Conference on Flow Dynamics
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Thermo-fluid behavior in a micro-grooved evaporator of LHP based on microscale infrared / visible observations2020

    • Author(s)
      Y. Nakatsugawa, K. Odagiri, and H. Nagano
    • Organizer
      The 31st International Symposium on Transport Phenomena
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Thermo-fluid characteristics of a capillary pumped loop with different reservoir locations2020

    • Author(s)
      K. Odagiri, H. Nagano, and H. Ogawa
    • Organizer
      50th International Conference on Environmental Systems
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 宇宙機の極低温ミッション用ループヒートパイプの設計検討2020

    • Author(s)
      常新雨, 小田切公秀, 安達拓矢, 小川博之, 永井大樹
    • Organizer
      令和2年度宇宙航行の力学シンポジウム
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2023-01-30  

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