난류모델에 따른 전류영점부근 아크온도특성에 관한 해석적 연구

In this study, we calculated arc discharges happened in high-voltage circuit breakers for understanding the complex physics and the probability of thermal breakdown. The four main features of arc modeling for this virtual-reality are radiation, PTFE ablation, Cu evaporation, and turbulence. Among these important parts, the turbulence model can be critical to the reliability of computation results near current zero as well as during high-current period because the plasma flow is affected by high heat energy and mass momentum. Two kinds of turbulence model, zero-equation model and two-equation model, are applied for these calculations and are compared with the measured pressure data inside a chamber.