2021 Fiscal Year Final Research Report
Elucidation of phase change heat transfer characteristics in the extremely low flow velocity region and application to self-excited oscillating heat transfer devices
| Project/Area Number |
19K04220
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 19020:Thermal engineering-related
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| Research Institution | Fukuoka University (2020-2021)
Kyushu University (2019) |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| 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 |
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| 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.
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| Free Research Field |
熱工学
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| 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．
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