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The impressive experimental result at Sandia National Laboratory has proven the wire-array Z pinch an effective way to form extremely high density X-ray sources. The X-ray yield is greatly influenced by the uniformity of the exploding product of each wire in the initial stage, which gives a strong impetus to the research on single-wire explosion. When the current flows through a thin metal wire in...
By considering properties of the arc, heat and radioactive phenomena and air blow, a simplified simulation model is introduced to investigate relations of the pressure and arc power. Influence of different wall parameters such as shape and materials are considered in the simulation model. According to the simplified simulation model, the corresponding experiment model is established to measure the...
For a simplified arc quenching chamber of molded case circuit breaker (MCCB), based on computational fluid dynamics (CFD) software FLUENT, a physical and mathematical model of the high current breaking process of the gas flow and pressure field in arc quenching chamber is built. The erosion of gassing material and contact material, actual arc power is considered in the model. Based on this model,...
Anode material seriously influences the characteristics of vacuum arc and further affects the performance of medium-voltage vacuum switches when the interruption current is high. There are many materials used for electrode manufacture, and different materials are selected for different switches. For a pure metal, its performance usually cannot satisfy the actual requirement. To improve switch’s performance,...
Based on a two-dimensional steady magnetohydrodynamic (MHD) model, the influence of gap distance change on vacuum arc characters is simulated and analyzed. Firstly, a vacuum arc with constant current and variational gap distance is studied. It could be known that, with the increase of gap distance, the magnitude of the vacuum arc plasma parameters increases and the radial asymmetry of them aggravates...
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