Analysis of High-Temperature Gas Behavior Reflected to Sidewall in Sealed Arc Extinguishing Chamber

The high-temperature gas should be dissipated in the sealed arc extinguishing chamber. It is possible to lead to diffuse and reflect the high-temperature gas toward another direction from heat convective transfer after extending the arc with external magnetic field. However, the high-temperature gas reflected to the sidewall directs to inter-electrode may cause re-ignition because of its flow velocity even if the arc was extinguished. In addition to that, prediction of the phenomena is desired before the re-ignition because it takes much time to analyze complex phenomenon with experiment and simulation. The distributions must be obtained under the various conditions of shapes as a parameter. Such a method requires many results with finely varied calculation area using simulation. The goal of this research is to predict another distribution shaped the sidewall as a parameter using a result of the distribution. The method finds the results of the phenomena with the conditions of all shapes of the sidewall using a result, thus it shortens the term of development. The first objective is lowering the temperature in inter-electrodes by diffusing the high-temperature gas that move to the sidewalls in all directions. Then, the charged particle density in inter-electrode from inflow after reflection decrease. Therefore, in this research, high-temperature gas behavior reflected to the sidewall in the sealed arc extinguishing chamber was analyzed by three-dimensional electromagnetic thermal fluid simulation.