A study of the boiling phenomena with the enhanced heat transfer in superfluid helium under microgravity condition
| Project/Area Number |
22360361
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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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| Research Field |
Aerospace engineering
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
KIMURA Nobuhiro 大学共同利用機関法人高エネルギー加速器研究機構, 超伝導低温工学センター, 准教授 (10249899)
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| Co-Investigator(Kenkyū-buntansha) |
MAMIYA Mikihirto 独立行政法人産業技術総合研究所, ナノテクノロジー・材料・製造分野研究企画室, 主幹 (10358062)
TAKADA Suguru 核融合科学研究所, ヘリカル研究部装置工学・応用物理研究系, 助教 (30578109)
NOZAWA Masakazu 秋田工業高等専門学校, 機械工学科, 講師 (60447183)
OKAMURA Takahiro 高エネルギー加速器研究機構, 素粒子原子核研究所, 准教授 (90415042)
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| Project Period (FY) |
2010-04-01 – 2013-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2011: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2010: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
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| Keywords | 超流動ヘリウム / 微小重力 / 伝熱促進効果 / 臨界熱流束 / 可視化技術 / 膜沸騰 / He II / 対流熱伝達 / 自由落下 / 単気泡 / 沸騰熱伝導 / 気泡の生成・消滅 / 蒸気膜厚さ / 界面熱抵抗 / 液相と気送間の熱抵抗 |
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| Research Abstract |
Not only itself has unique such as a fluid with zero viscosity and zero entropy or the high thermal conductivity, but also superfluid helium (He II) has a very unique characteristic in the boiling. Many studies were conducted about film boiling in He II, but cannot say until now that the unique was understood all. Rather it is the present conditions that the phenomenon that is new by becoming it the use of high sensitivity sensor and the visualization technology in cryogenic temperature is discovered.
In this study, in order to understand he gravity effect of boiling phenomena in He II, the experiments and its analysis were carried out by optical visualization with high-speed video camera under microgravity condition. It was suggested that the contribution of the thermal diffusion by the film boiling to a liquid phase in superfluid helium was larger than the contribution of the thermal diffusion to a gas phase in normal fluid helium.
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Report
(4 results)
Research Products
(35 results)
