蒸汽爆炸的影响因素分析

Analysis of Vapor Explosion Effect Factors

为研究各种影响因素对蒸汽爆炸的影响,设计建造了低温熔融金属入水碎化的可视化实验装置。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热扩散系数、温度及冷却水温度对蒸汽爆炸的影响。实验结果表明,熔融金属热扩散系数和金属温度的乘积与蒸汽爆炸脉冲成正比;冷却水温度对蒸汽爆炸起抑制作用。熔融金属热扩散系数是影响蒸汽爆炸的重要因素。

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 the experiment,molten material jet was injected into water to experimentally obtain the visualized information.The effects of metal thermal diffusivity,metal temperature,and coolant temperature were investigated.The experimental results show that the vapor explosion impulse is direct proportion to the arithmetic product of metal thermal diffusivity and temperature.The increase of the coolant temperature decreases the pressure of the vapor explosion.The metal thermal diffusivity has an important effect on the vapor explosion behavior and pressure.