A study of the boiling phenomena with the enhanced heat transfer in superfluid helium under microgravity condition

微重力条件下超流氦强化传热沸腾现象研究

• 批准号: 22360361
• 负责人: KIMURA Nobuhiro
• 金额: $ 6.74万
• 依托单位: High Energy Accelerator Research Organization
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010-04-01 至 2013-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22360361/
• 关键词: 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

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.

超流氦(He II)不仅本身具有零粘度、零熵或高导热系数等独特的流体特性，而且在沸腾过程中也具有非常独特的特性。关于He II中的薄膜沸腾已经进行了许多研究，但直到现在还不能说唯一的是被理解的。而是利用高灵敏度传感器和低温温度可视化技术发现的新现象。为了了解氦II沸腾现象的重力效应，用高速摄像机在微重力条件下进行了实验和分析。结果表明，在超流氦中，膜沸腾的热扩散对液体相的贡献大于在正常流体氦中的热扩散对气相的贡献。

项目成果

Visual observation of film boiling in saturated He II under microgravity using drop tower

使用落塔目视观察微重力下饱和氦气中的薄膜沸腾

• 发表时间: 2011
• 期刊: Proc.of ICEC 23
• 作者: S.Takada;N.Kimura;et al
• 通讯作者: et al

可視化法を用いた微小重力中の超流動ヘリウムと常流動ヘリウムのプール沸騰熱伝達の研究

微重力条件下超流氦与常流氦池沸腾传热可视化研究

• 发表时间: 2012
• 作者: 横田久美子;田川雅人;高田卓,木村誠宏,間宮幹人,岡村崇弘,野澤正和,他
• 通讯作者: 高田卓,木村誠宏,間宮幹人,岡村崇弘,野澤正和,他

Visualization study of silent film boiling in He II under microgravity and under normal gravity

He II微重力和常重力下静膜沸腾的可视化研究

• 发表时间: 2011
• 作者: S. Takada;N. Kimura;T. Okamura;M. Murakami
• 通讯作者: M. Murakami

超流動ヘリウム中の特異な極低温膜沸騰現象

超流氦中独特的低温薄膜沸腾现象

• 发表时间: 2013
• 期刊: 伝熱
• 作者: Go Ono;Kengo Shintaku;Yoji Shirasawa,Osamu Mori;Yasuyuki Miyazaki;andSaburo Matunaga;野澤 正和
• 通讯作者: 野澤 正和

Visual observation of film boiling in saturated He II under microgravity using drop tow er

微重力下饱和氦气中薄膜沸腾的落塔目视观察

• 发表时间: 2011
• 期刊: Proc. of ICEC 23
• 作者: J.Ye;H.Ijima;et al.;S. Takada,N. Kimura,et al.
• 通讯作者: S. Takada,N. Kimura,et al.