Polarity effect in DC breakdown voltage characteristics of pressurized carbon dioxide up to supercritical conditions

被引：30

作者：

Kiyan, Tsuyoshi ^{[1
]}

Takade, Maya ^{[1
]}

Namihira, Takao ^{[1
]}

Hara, Masanori ^{[1
]}

Sasaki, Mitsuru ^{[1
]}

Goto, Motonobu ^{[1
]}

Akiyama, Hidenori ^{[1
]}

机构：

[1] Kumamoto Univ, Grad Sch Sci & Technol, Kumamoto 8608555, Japan

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2008年 / 36卷 / 03期

基金：

日本学术振兴会;

关键词：

carbon dioxide; corona discharge; DC discharge; mist; plasma reactor; polarity effect; supercritical (SC) fluid;

D O I：

10.1109/TPS.2008.920229

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

This paper deals with the effect of the polarity and gap geometry on dc breakdown voltage characteristics of a point-to-plane gap in supercritical carbon dioxide (SC CO2) that is required to design a plasma reactor. In the experiments, the gap width d and the curvature radius of the point tip r were changed in the range of 80 to 300 pm and 50 to 170 pin respectively, and the CO2 state was controlled within the gas, liquid, and SC phases. The experimental results showed that a remarkable polarity effect appeared under certain gap conditions. As a result, it was found that negative polarity and a higher stressed electrode are desired conditions for the dc plasma reactor since an active corona supplying rich chemical radicals appears in SC CO2 under such conditions.

引用

页码：821 / 827

页数：7

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