中文摘要：

采用高速摄像仪拍摄记录熔融金属液柱入水碎化的过程。实验研究了熔融金属温度、入水速度、冷却水温度对熔融金属液柱下落过程的影响。实验结果表明，无量纲碎化长度与经验关系公式吻合得很好；熔融金属温度对金属下落速度没有影响；提高冷却水温度对熔融金属液柱的下降速度有一定的促进作用；大直径金属液柱的平均下降速度明显大于小直径的平均下降速度。

英文摘要：

In order to investigate the coarse mixing stage mechanism of the vapor explosion, an observable experiment equipment facility for low-temperature molten materials to be dropped into water was designed in this study. In the experiment, molten material jet was injected into water to experimentally obtain the visualized information. The effects of metal temperature, coolant temperature and jet diameter were investigated. The experimental results show that jet dimensionless length L/D agrees well with the correlation. The jet diameter and coolant temperature have effects on the falling of the jet front while metal temperature hasn＇t.