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Elucidation of phase change heat transfer characteristics in the extremely low flow velocity region and application to self-excited oscillating heat transfer devices

Research Project

Project/Area Number 19K04220
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionFukuoka University (2020-2021)
Kyushu University (2019)

Principal Investigator

Miyata Kazushi  福岡大学, 工学部, 准教授 (00610172)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords非定常相変化二相流 / 自励振動ヒートパイプ / シミュレーション / 極低流速相変化熱伝達 / 自励流速振動現象
Outline of Research at the Start

本研究は,小型高性能の熱輸送デバイスとして電子機器冷却や宇宙空間での利用が期待されている自励振動ヒートパイプ(PHP)の未解明の動作原理を明らかにすることを目的としています.
PHP内部を流れる冷媒の流速は激しく変化しており現象が複雑であるので,このような非定常の流れを解析できる新しいシミュレーションモデルを開発し,その解析結果をもとに自励振動流が生じる原理を明らかにします.また,PHP内の冷媒の流れで特徴的な,極低流速域(振動により流れの向きが変わる瞬間)の相変化熱伝達特性を明らかにするための実験を行います.

Outline of Final Research Achievements

The purpose of this study is to clarify the unexplained operating principle of the pulsating heat pipe (PHP), which is expected to be used as a compact, high-performance heat transport device in places where equipment maintenance is difficult, such as in outer space. First, we measured the phase change heat transfer coefficient during the velocity change, that is a characteristic flow of the working fluid in PHP, and discussed on the data. We also developed a simulation model that reproduces and predicts the complex flow of working fluid in PHP, and succeeded in reproducing the existing experimental results.

Academic Significance and Societal Importance of the Research Achievements

宇宙空間などに代表される機器の保守が非常に困難な環境において,機器の発熱や受熱を除去できる信頼性の高い熱輸送デバイスの開発が求められており,自励振動ヒートパイプはその候補です.これまでは流体の自励振動現象が生じるメカニズムが未解明で,開発・設計に資する知見が整備されていませんでした.本研究で開発された自励振動現象を再現・予測するシミュレーションモデルにより,自励振動中の圧力場などが可視化され,実用化に向けた大きな前進が期待されます.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Stability Boundary of Boiling Flow Oscillation in Two-Parallel Mini-Channels2021

    • Author(s)
      黒瀬築,登立航,松澤遼,宮田一司,濱本芳徳
    • Journal Title

      Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers

      Volume: 38 Issue: 2 Pages: 105

    • DOI

      10.11322/tjsrae.21-06NK_OK

    • NAID

      130008038475

    • ISSN
      1344-4905, 2185-789X
    • Year and Date
      2021-06-30
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Transient Boiling Heat Transfer during Flow Rate Reduction of a Refrigerant Flowing in a Horizontal Mini-Channel2021

    • Author(s)
      坂井祥平,黒瀬築,宮田一司,濱本芳徳
    • Journal Title

      Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers

      Volume: 38 Issue: 2 Pages: 115

    • DOI

      10.11322/tjsrae.21-07NK_OA

    • NAID

      130008038477

    • ISSN
      1344-4905, 2185-789X
    • Year and Date
      2021-06-30
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Development of simulation model for flow behavior in pulsating heat pipes2021

    • Author(s)
      Kizuku Kurose, Shota Ouchi, Kazushi Miyata
    • Organizer
      Second Asian Conference on Thermal Science (2nd ACTS)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 自励振動ヒートパイプの流動特性に関するシミュレーションモデル2021

    • Author(s)
      黒瀬 築、大内 翔太、宮田 一司、上野 一郎
    • Organizer
      第58回日本伝熱シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 水平ミニチャンネルを流れる冷媒の流量減少過程における過渡沸騰熱伝達2021

    • Author(s)
      坂井祥平,黒瀬築,宮田一司,濱本芳徳
    • Organizer
      日本機械学会九州支部第74期総会・講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] ミニチャンネル内気液二相流の摩擦圧力損失に及ぼす質量速度の影響2021

    • Author(s)
      大倉煕史,本田幹,眞柴佳煕,横谷有右太,宮田一司,高尾幸来
    • Organizer
      日本機械学会九州支部第74期総会・講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 水平ミニチャンネル内を低質量速度で流れる冷媒の沸騰熱伝達率2020

    • Author(s)
      坂井祥平,黒瀬築,宮田一司,濱本芳徳
    • Organizer
      第57回日本伝熱シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] 自励振動ヒートパイプの動作に関するシミュレーションの開発2020

    • Author(s)
      黒瀬築,宮田一司
    • Organizer
      第57回日本伝熱シンポジウム
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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