ELECTRICAL BREAKDOWN MECHANISM OF LIQUID-NITROGEN IN THE PRESENCE OF THERMALLY INDUCED BUBBLES

被引：34

作者：

HARA, M

KANEKO, T

HONDA, K

机构：

[1] Kyushu Univ, Fukuoka, Jpn, Kyushu Univ, Fukuoka, Jpn

来源：

CRYOGENICS | 1987年 / 27卷 / 02期

关键词：

LIQUIDS - Electric Breakdown - NITROGEN - Physical Properties;

D O I：

10.1016/0011-2275(87)90148-2

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

An investigation of the electrical breakdown behavior of liquid nitrogen in the presence of a local hot spot on an electrode has been performed to determine the breakdown mechanism of liquid coolant in cryoresistive or superconducting apparatus under quenching conditions. It has been found that the vapor bubbles are generated at a hot spot and the manner of the vapor generation and the vapor structure depend strongly on the ambient pressure, the heat transfer rate at a hot spot and the applied voltage. Electrical breakdown took place through various series of composites of liquid and gas phases, depending on the pressure and the heating power applied to a hot spot. Therefore, the breakdown characteristic of liquid nitrogen under hot spot conditions depended to a marked degree on these factors.

引用

页码：93 / 101

页数：9

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