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Energy mode change between second sound thermal pulse and evaporation wave in the vicinity of free surface of superfluid He II

超流体He II自由表面附近第二声热脉冲与蒸发波能量模式变化

基本信息

批准号：
14350506
负责人：
MURAKAMI Masahide
金额：
$ 9.28万
依托单位：
University of Tsukuba
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
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

项目摘要

The energy balance across a phase boundary is important for the consideration of evaporation phenomena from a free surface of superfluid helium. The super thermal conduction as a heat transport mechanism, second sound thermal pulse and quantized vortices that impede the heat transfer must be included into a quantitative consideration. In order to clarify the phenomena, a number of relating physical phenomena are experimentally investigated.1.Evaporation upon an oblique incidence of a thermal pulse on a He II free surface : It had been reported that fairly good agreement had resulted between a theoretical prediction on the basis of the energy balance among an incident thermal pulse, a reflecting thermal pulse and evaporation wave with the present experimental result with an error of only 5%, but a complete agreement had not been attained. The discrepancy was supposed to arise from the effects of reflecting first sound compression wave and presumably a ripron, but the present experiment could not reveil the cause. In the case of thermal pulse incidence with a large incident angle, a total reflection occurred, though the total reflection was observed only at the wave front but was not observed in the uniform portion behind the wave front.2.Cavitation flow of He II : Fundamental differences are found between cavitating flows of He I and He II. It is concluded that these are primarily caused by the difference in the heat transfer mechanisms, the super thermal conduction in He II and the thermal conduction in He I. Even a lambda phase transition is induced because of large temperature drop caused by cavitation.3.He II boiling : There appear a noisy and silent film boiling modes under nearly saturated vapor pressure condition, and a number film boiling modes in subcooled He II.4.Superfluid shock tube : It is observed large scale evaporation and subsequent condensation occur upon an incidence of a gas dynamic shock wave on a He II free surface.

在考虑超流氦自由表面的蒸发现象时，跨相边界的能量平衡是重要的。作为传热机制的超热传导、第二声热脉冲和阻碍传热的量子化涡必须纳入定量考虑。为了阐明这些现象，对一些相关的物理现象进行了实验研究。热脉冲斜入射在He II自由表面上的蒸发：据报道，基于入射热脉冲、反射热脉冲和蒸发波之间能量平衡的理论预测与目前的实验结果相当吻合，误差仅为5%，但尚未达到完全一致。这种差异被认为是由反射第一声压缩波的影响引起的，可能是一个ripron，但目前的实验无法揭示原因。在大入射角的热脉冲入射情况下，发生了全反射，但只在波前处观察到全反射，而在波前后的均匀部分没有观察到全反射。He II的空化流：He I和He II的空化流有根本的区别。结果表明，这主要是由于传热机理的不同造成的，He II和He i的超热传导，由于空化引起的温度下降较大，导致了λ相变。He II沸腾：在蒸气压接近饱和的条件下，出现了噪声和无声的膜沸腾模式，在过冷的He II沸腾状态下出现了多个膜沸腾模式。超流体激波管：观察到气体动力激波在He II自由表面上发生大尺度蒸发和随后的冷凝。

项目成果

期刊论文数量（63）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Experiments of Highly Transient Thermo-Fluid Dynamic Phenomena in He II Induced by Gas Dynamic Shock Wave Impingement

气体动力冲击波冲击He II 中高瞬态热流体动力学现象的实验

DOI：
发表时间：
2002
期刊：
Adv.Cryo.Engineering 47B
影响因子：
0
作者：
Yokota K.;K.Urayama;H.Nagai
通讯作者：
H.Nagai

Study of Evaporation from He II Free Surface Induced by Thermal Shock Wave

热冲击波引起He II自由表面蒸发的研究

DOI：
发表时间：
2002
期刊：
Adv.Cryo.Engineering 47B
影响因子：
0
作者：
M.Murakami
通讯作者：
M.Murakami

Comparison of cavitation Flows in He I and He II

He I 和 He II 中空化流的比较

DOI：
发表时间：
2003
期刊：
Cryogenics 43-9
影响因子：
0
作者：
T.Ishii;M.Murakami
通讯作者：
M.Murakami

Study of Evaporation from He 11 Free Surface Induced by Thermal Shock Wave

热冲击波引起He 11 自由表面蒸发的研究

DOI：
发表时间：
2002
期刊：
Adv.Cryo.Engineering 47B
影响因子：
0
作者：
M.Murakami;M.Maki;J.Fujiyama;T.Furukawa
通讯作者：
T.Furukawa

T.Ishii: "Comparison of cavitation Flows in He I and He II"Cryogenics. 43-9. 507-514 (2002)

T.Ishii：“He I 和 He II 中空化流的比较”低温学。

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MURAKAMI Masahide其他文献

Structural performance evaluation and verifications for mud walls based on their resistance mechanism Part 3 Verification for mud walls constructed with Shiga Specifications

基于阻力机制的泥墙结构性能评估和验证第3部分滋贺规范建造的泥墙验证

DOI：
发表时间：
2004
期刊：
SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING, ARCHITECTURAL INSTITUTE OF JAPAN 2004,C-1
影响因子：
0
作者：
ENDO Takeshi;OKANOTO Sigefumi;MURAKAMI Masahide;KAWANABE Aiko;SAWATA Kei;SUZUKI Tamotsu;INAYAMA Masahiro
通讯作者：
INAYAMA Masahiro

Structural Performance Evaluation and Verifications for Mud Walls Based on Their Resistance Mechanism Part 7 Prediction on Shear Force-Deformation Curves of Mud Walls with the Component-based Experiments

基于阻力机制的泥墙结构性能评估与验证第7部分基于构件的试验预测泥墙剪力-变形曲线

DOI：
发表时间：
2004
期刊：
SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING, ARCHITECTURAL INSTITUTE OF JAPAN 2004,C-1
影响因子：
0
作者：
OKANOTO Sigefumi;MURAKAMI Masahide;SUZUKI Tamotsu;INAYAMA Masahiro
通讯作者：
INAYAMA Masahiro

A High-Resolution Modeling Technique of Irregular Subsurface, Structures using H/V Spectral Ratio of Long-Period Microtremors

利用长周期微震的 H/V 谱比对不规则地下结构进行高分辨率建模技术

DOI：
发表时间：
2004
期刊：
Proceedings of 13^<th> World Conference on Earthquake Engineering No.1(CD-ROM)
影响因子：
0
作者：
OKANOTO Sigefumi;MURAKAMI Masahide;SUZUKI Tamotsu;INAYAMA Masahiro;Hirotoshi Uebayashi
通讯作者：
Hirotoshi Uebayashi

Structural performance evaluation and verifications for mud walls based on their resistance mechanism Part 1 A new method for component-based test of partial structural wall to predict shear wall behavior

基于阻力机制的泥浆墙结构性能评估与验证第1部分：基于构件的部分结构墙测试预测剪力墙性能的新方法

DOI：
发表时间：
2004
期刊：
SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING, ARCHITECTURAL INSTITUTE OF JAPAN 2004,C-1
影响因子：
0
作者：
MURAKAMI Masahide;OKANOTO Sigefumi;SUZUKI Tamotsu;INAYAMA Masahiro
通讯作者：
INAYAMA Masahiro

Structural performance evaluation and verifications for mud walls based on their resistance mechanism Part 2 Verification for mud walls constructed with Kyoto Specifications

基于阻力机制的泥墙结构性能评估和验证第2部分按照京都规范建造的泥墙验证

DOI：
发表时间：
2004
期刊：
SUMMARIES OF TECHNICAL PAPERS OF ANNUAL MEETING, ARCHITECTURAL INSTITUTE OF JAPAN 2004,C-1
影响因子：
0
作者：
OKANOTO Sigefumi;MURAKAMI Masahide;SUZUKI Tamotsu;INAYAMA Masahiro
通讯作者：
INAYAMA Masahiro