Basse N P T, Bini R, Seeger M
ABB Switzerland Ltd., Corporate Research, Baden-Dättwil, CH-5405, Switzerland.
Appl Opt. 2009 Nov 10;48(32):6381-91. doi: 10.1364/AO.48.006381.
The performance of high voltage gas circuit breakers depends on the temperature distribution of hot gas or plasma from the arc zone mixed with cold gas that is present, for example, in the exhausts and mixing volume. Understanding the details of the mixing process is imperative to estimate the temperature distribution within the entire breaker volume. Design studies rely on computational fluid dynamics (CFD) simulations to search for the best way to achieve satisfactory mixing. One key uncertainty in the CFD simulations is the role of turbulence in this process and how to properly account for it. To gain knowledge of the mixing process between hot and cold gases, we have constructed a simplified breaker geometry that is flexible and accessible to diagnostics. Apart from standard measurements of current and arc voltage, we measure pressure in the arc zone and the mixing volume. Further, the mixing volume is specially designed to be transparent, allowing us to make shadowgraphy measurements of the turbulent mixing during and after the arcing phase. We report on experiments performed in air at atmospheric pressure.
高压气体断路器的性能取决于来自电弧区域的热气体或等离子体与例如排气口和混合容积中存在的冷气体混合后的温度分布。了解混合过程的细节对于估算整个断路器容积内的温度分布至关重要。设计研究依赖于计算流体动力学（CFD）模拟来寻找实现令人满意混合的最佳方法。CFD模拟中的一个关键不确定性是湍流在这个过程中的作用以及如何恰当地考虑它。为了了解热气体和冷气体之间的混合过程，我们构建了一个简化的断路器几何结构，该结构灵活且便于进行诊断。除了对电流和电弧电压进行标准测量外，我们还测量电弧区域和混合容积中的压力。此外，混合容积经过特殊设计以使其透明，从而使我们能够在电弧阶段期间和之后对湍流混合进行阴影摄影测量。我们报告了在大气压力下于空气中进行的实验。
