2023 Fiscal Year Final Research Report
Dynamics of liquid-solid contact on a hot solid surface that determines quenching point
| Project/Area Number |
21H01264
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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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 | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
高田 保之 九州大学, 工学研究院, 教授 (70171444)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 相変化伝熱 / スプレー冷却 / 液滴蒸発 / 鋼板冷却 |
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| Outline of Final Research Achievements |
Spray cooling is the leading technology for rapid cooling, and the controllability of this cooling process depends on how freely the quench temperature (quench point) can be controlled. Therefore, in this study, we developed an environment-controlled spray cooling device and focused on examining the effects of various control factors of the ambient environment (pressure and gas types) on the quench point temperature and droplet evaporation behavior.
In spray cooling with varying ambient pressure, the cooling rate increased as the pressure increased, and the quench temperature also rose with higher pressure. Additionally, it was found that the quench temperature could be accurately estimated using a model that assumes upward-facing pool film boiling.
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| Free Research Field |
熱工学
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| Academic Significance and Societal Importance of the Research Achievements |
スプレー冷却は急速冷却技術の本命であり，この冷却プロセスの制御性は急冷開始温度（クエンチ点）をいかに自在に制御できるかにかかっている．特に鉄鋼製造プロセスでは，冷却速度によって材質の微細構造を制御し，その材質の特性を決定するため，スプレー冷却の高精度制御が望まれている．
本研究にて，上向き平板のプール膜沸騰を想定したモデルからクエンチ温度を良好に推算できることが分かったため，今後このモデルを行動することで，鋼板製造プロセスのさらなる発展に貢献することが期待される． また得られた知見は半導体装置および電子機器の冷却など，広範な冷却プロセスへの応用も可能である．
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