Variation of film boiling modes in HeII from strongly to weakly subcooled states

被引：0

作者：

Nozawa, M. ^{[1
]}

Kimura, N. ^{[2
]}

Murakami, M. ^{[1
]}

Takadal, S. ^{[1
]}

机构：

[1] Univ Tsukuba, Grad Sch Syst & Informat Engn, Tennodai 1-1-1, Tsukuba, Ibaraki 3058573, Japan

[2] High Energy Accelerator Res Org, Cryogen Sci Ctr, Appl Res Lab, Tsukuba, Ibaraki 3050801, Japan

来源：

ADVANCES IN CRYOGENIC ENGINEERING, VOLS 51A AND B | 2006年 / 823卷

基金：

日本学术振兴会;

关键词：

subcooled superfluid helium; film boiling mode; and visualization;

D O I：

暂无

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Film boiling modes in both subcooled and saturated superfluid helium (He 11) were experimentally investigated. The visual observation and the transient pressure and temperature measurements were performed to extract some characteristics of each boiling mode. The classification of all four film boiling modes, strongly subcooled and weakly subcooled modes in subcooled He 11 (He IIp) and noisy and silent film boiling modes in saturated He 11 (He IIs), was drawn on the boiling mode map. It was found from the heater temperature measurement that the boiling heat transfer is enhanced in the weakly subcooled mode compared with in the strongly subcooled mode. In the weakly subcooled mode, the vapor behavior is much activated by the instability in vapor-liquid interface. The boundary region between the strongly and the weakly subcooled modes becomes thick as the rise of He 11 temperature or the increase of the heat flux. The noisy film boiling does not occur at the pressure above 9 kPa, though it appears at the pressure above p(lambda). It is found that in the region adjacent to the lambda line He I film boiling mode occurs even in He II.

引用

页码：393 / +

页数：2

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