Arcs have long been used as a light and a heat source. Modern industrial applications demand the arc<br/> discharge to be run at a power level which has not been encountered hitherto. Because of the high power level<br/> encountered, there...
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https://www.riss.kr/link?id=A75896789
2002
Korean
550
학술저널
1913-1918(6쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
Arcs have long been used as a light and a heat source. Modern industrial applications demand the arc<br/> discharge to be run at a power level which has not been encountered hitherto. Because of the high power level<br/> encountered, there...
Arcs have long been used as a light and a heat source. Modern industrial applications demand the arc<br/>
discharge to be run at a power level which has not been encountered hitherto. Because of the high power level<br/>
encountered, there is a strong interaction between the arc discharges and their surroundings. This interaction<br/>
makes quantitative prediction of industrial arc plasma systems extremely difficult. The design of such systems<br/>
is still largely based on trial and error although the situation is rapidly improving because of the available<br/>
computational power at a cost which is still rapidly coming down. The desire to predict the behavior of arc<br/>
plasma system, thus reducing the development cost, has been the motivation of arc research. The most<br/>
enormous duty of a circuit breaker is to interrupt fault current in a circuit, thereby protecting other<br/>
components from damage. This is achieved by separating the two contacts in a gas or a liquid, and an arc is<br/>
inevitably established between the contacts. The arc must be controlled during the high current phase of the<br/>
AC cycle and interrupted at an appropriate current zero. In this paper, we have simulated the flow<br/>
characteristics of high current arc and surrounding gas in a SF6 gas circuit breaker. This is based on an arc<br/>
model which takes account of the turbulence enhanced momentum and heat transfer and the radial radiation<br/>
transfer (including re-absorption at the edge of the arc). The radiation transfer in a circuit breaker is calculated<br/>
based on a monotonic radial temperature profile from the axis. The temperature, velocity, electric field as well<br/>
as the pressure can easily be visualized under arcing conditions.
목차 (Table of Contents)
다중 구속조건을 고려한 격자체 구조물의 충격해석 모델개선