Transient simulation of nozzle geometry change during ablation in high-voltage circuit breakers

被引：4
|
作者：
Arabi, Sina [1 ]
Trepanier, Jean-Yves [1 ]
Camarero, Ricardo [1 ]
机构：
[1] Ecole Polytech, Montreal, PQ H3T 1J4, Canada
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2015年 / 48卷 / 04期
基金：
加拿大自然科学与工程研究理事会;
关键词：
circuit-breakers; nozzle; arcing flow; radiation; ablation; magnetohydrodynamics; COMPUTATION; ARCS; SF6;
D O I：
10.1088/0022-3727/48/4/045501
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In high voltage circuit breakers, radiated heat from the electric arc is strongly absorbed by surrounding poly-tetra-fluro-ethylene (PTFE) parts and causes them to reach their vaporization temperature and ablate. Ablation deforms the PTFE parts, widens the throat and hence, changes the nozzle geometry. This paper presents a physical model coupling plasma flow simulation with erosion and movement of the PTFE walls to study this phenomena. The model is first applied and validated on a segmented tube case and on a model SF6 circuit breaker for which the experimental data is available. Then, the model is used to investigate the effect of the surface ablation on the nozzle geometry in a long-operation time.
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收藏
页数：16
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