Micro thermo-fluid mechanism generated near the interface in superfluid liquid helium

超流液氦界面附近产生的微热流体机制

• 批准号: 21760148
• 负责人: NOZAWA Masakazu
• 金额: $ 2.91万
• 依托单位: Akita National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21760148/
• 关键词: 熱工学; 流体工学; 低温工学; 超流動; 可視化

The heat transfer characteristics and the vapor layer behavior of the film boiling in the saturated superfluid helium (He II) were experimentally investigated. He II has been utilized as an excellent coolant for cooling of the superconducting magnet and the space observation instrument. In the present study, the heat transfer coefficient during film boiling was measured by use of the stainless thin film heater and the vapor layer behavior was observed by use of the high speed video camera. The hydrodynamic stability of the film boiling in He II was examined. It is confirmed that the heat transfer during the saturated film boiling correlates with the heat conductivity function for turbulent He II. It is found that the heat transfer is enhanced as the mean vapor layer thickness decreases and the frequency of the vapor layer behavior increases.

实验研究了饱和超流氦（He II）中膜状沸腾的传热特性和汽层特性。He II已被用作冷却超导磁体和空间观测仪器的优良冷却剂。本研究采用不锈钢薄膜加热器测量了薄膜沸腾过程中的传热系数，并利用高速摄像机观察了蒸汽层的行为。研究了He Ⅱ中膜沸腾的流体动力学稳定性。结果表明，饱和膜沸腾过程中的传热与湍流He Ⅱ的导热函数有关。结果表明，随着平均汽层厚度的减小和汽层行为频率的增加，传热得到增强。

项目成果

HeII中の大気圧から飽和圧力の範囲で発生する各膜沸騰モードの熱流動状態

HeII中从大气压到饱和压力范围内各膜沸腾模式的热流状态

• 发表时间: 2010
• 期刊: 低温工学 第45巻
• 作者: 野澤正和;木村誠宏;村上正秀;高田卓
• 通讯作者: 高田卓

He II中の大気圧から飽和圧力の範囲で発生する各膜沸騰モードの熱流動状態

He II中从大气压到饱和压力范围内各膜沸腾模式的热流状态

• 发表时间: 2010
• 期刊: 低温工学
• 作者: 野澤正和;木村誠宏;村上正秀;高田卓
• 通讯作者: 高田卓

Study of Unstable Phenomena of Film Boiling in Superfluid Helium

超流氦中薄膜沸腾不稳定现象的研究

• 发表时间: 2009
• 作者: Masakazu Nozawa;Shinichi Chiba;Nobuhiro Kimura;Katsuhide Ohira
• 通讯作者: Katsuhide Ohira

Thermo-fluid Dynamics of Several Film Boiling Modes in He II in the Pressure Range between Atmospheric Pressure and Saturated Vapor Pressure

大气压至饱和蒸气压压力范围内He II 中几种薄膜沸腾模式的热流体动力学

• 发表时间: 2009
• 期刊: Cryogenics 49
• 作者: M.Nozawa;N.Kimura;M.Murakami;S.Takada
• 通讯作者: S.Takada

超流動ヘリウム中の飽和膜沸騰における蒸気膜界面近傍の伝熱特性

超流氦饱和膜沸腾过程中汽膜界面附近的传热特性

• 发表时间: 2009
• 作者: 野澤 正和;千葉真一;大平勝秀;木村誠宏
• 通讯作者: 木村誠宏