BREAKUP MECHANISM IN MOLTEN TIN JETS

摘要

One of the authors reported a breakup mechanism originating in the coolant entrained within a molten jet due to the coupling motion between the surrounding coolant and the jet in ICONE-7. In order to clarify the breakup, the fragmentation and the relationship between them originating in the mechanism reported in ICONE-7, the authors carried out two series of experiments in the present study. The first series of experiments was conducted to observe the breakup in molten tin jets with a fixed initial-diameter of 13mm. In this series of experiments, the molten tin jets with initial temperatures ranging from 950°C to 250°C penetrated the water pools with low subcoolings of 10°C to 20°C. The second series of experiments was conducted to observe the fragmentation in the crusted molted-tin jets with a fixed initial temperature of 250°C. In this series of experiments, the molten tin jets with initial diameters of 9mm to 25mm penetrated the water pool with a subcooling of 80°C. The present experimental study clearly shows that the breakup mechanism in the molten tin jets causes the fragmentation in the crusted molten-tin jets.