An application of the heat transfer enhancement effect of the self-induced vibration of superfluid helium to the space observation enquipment

超流氦自激振动强化传热效应在空间观测设备中的应用

• 批准号: 14550857
• 负责人: KIMURA Nobuhiro
• 金额: $ 1.86万
• 依托单位: High Energy Accelerator Research Organization (2004)The High Energy Accelerator Research Organization (2002-2003)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14550857/
• 关键词: superfuid helium; superconducting temprature sensor; visualization observation; film boiling mode; pressure dependence; λ-pressure; weakly subcooled film boiling; noisy film boiling; λ点圧力; シャドーグラフ; 透過式薄膜ヒーター; 表面張力波; 光学窓; 可視化法; シュリーレン法; ガスヘリ

The main result of this research would be arranged as follows1) In the strongly subcooled state of the He II, the vapor layer was very thin and the behavior of the vapor layer was relatively stable. As pressure of the He II bath was decreased, the behavior of the vapor layer was intensified gradually and the relatively stable area was diminished. And in the weakly subcooled state of the He II, the thickness of the vapor layer was increased as the decrease of the pressure of the bath. In the case of the pressure adjacent to λ-pressure, it was confirmed that the boiling state changed from stable boiling to unstable boiling. This boundary was confirmed in the pressure higher than 1-pressure.2) The subcooled and the silent film boiling in the He II are the same boiling mode and these film boiling modes are identical to the normal film boiling that occurs in common fluids. And the noisy film boiling in the He II is a kind of large-scale unstable phenomenon that generates the large oscillation in the heater temperature and the heat transfer coefficient, and it is the characteristic boiling mode in He II3) The boundary between the weakly subcooled and the noisy film boilings in He II exists just above λ-pressure. This boundary increases as the He II temperature decreases or the heat flux increases.

这项研究的主要结果将如下1）在HE II的强大稳压状态下排列，蒸气层非常薄，并且蒸气层的行为相对稳定。随着HE II浴的压力降低，蒸气层的行为逐渐逐渐，相对稳定区域降低。在HE II的弱亚冷却状态下，随着浴缸压力的降低，蒸气层的厚度增加了。在与λ压的相邻压力的情况下，已经证实沸腾的状态从稳定的沸腾变为不稳定的沸腾。在高于1压力的压力中证实了这一边界。2）子冷却和He II中的静音膜是相同的沸腾模式，这些薄膜沸腾模式与普通液体中的正常膜沸腾模式相同。在He II中沸腾的噪声膜是一种大规模的不稳定现象，它在加热器温度和传热系数中产生了较大的振荡，这是HE II3中的特征沸腾模式）弱亚型冷却和HE II中沸腾的噪声膜之间的边界存在于λ压力上。随着HE II温度降低或热通量的增加，该边界的增加。

项目成果

Film Boiling Modes in Weakly Subcooled He II around Lambda Pressure

弱过冷 He II 中 Lambda 压力附近的薄膜沸腾模式

• 发表时间: 2005
• 期刊: Proc.of ICEC 20 (印刷中)
• 作者: M.Nozawa;N.Kimura;M.Murakami
• 通讯作者: M.Murakami

Variation of Subcooled Film Boiling State in HeII with the Pressure

氦气中过冷膜沸腾状态随压力的变化

• 发表时间: 2004
• 期刊: Adv.in Cryog.Eng. 49
• 作者: M.Nozawa;N.Kimura;M.Murakami
• 通讯作者: M.Murakami

He II中のλ点圧力近傍から飽和圧力における膜沸騰モードの変化

He II 中薄膜沸腾模式从近 λ 点压力到饱和压力的变化

• 发表时间: 2004
• 期刊: 低温工学 39
• 作者: 野澤 正和;村上 正秀;張 鵬;木村 誠宏
• 通讯作者: 木村 誠宏

Variation of the Film Boiling Mode in He II from the Vicinity of the Lambda Pressure down to the Saturated State

He II 中膜沸腾模式从 Lambda 压力附近到饱和状态的变化

• 发表时间: 2004
• 期刊: Teionkogaku Vol.39
• 作者: 野澤 正和;村上 正秀;張 鵬;木村 誠宏;Toshio Iseki;M.Nozawa et al.
• 通讯作者: M.Nozawa et al.

M.Kozawa, N.Kimura, M.Murakami, I.Yamamoto: "Variation of Subcooled Film Boiling State in He II with the Pressure"Advances in Cryogenic Engineering. 49巻. (2004)

M.Kozawa、N.Kimura、M.Murakami、I.Yamamoto：“He II 中过冷薄膜沸腾状态随压力的变化”《低温工程进展》第 49 卷（2004 年）。