Experimental and numerical study of the vapor explosion for a multiple droplet system, 2; Experimental study on steam explosions induced by a single molten metal droplet

Ueda, Hayate*; Kamiya, Tomohiro ; Asahara, Makoto*

In a steam explosion caused by the penetration of molten metal into water, shock waves and pressure waves with rapid pressure rises are generated, leading to damage in the surrounding area. The collapse of the vapor film is expected to generate pressure waves from multiple molten metal fragments and amplify them. These pressure wave propagation mechanisms are complex, and clarifying the mechanism of initial pressure wave generation from a single droplet is an important task for accurate prediction and evaluation. Therefore, this study focuses on the steam explosion phenomenon involving a single molten metal droplet. In this presentation, we report the results of visualizing the behavior of the steam explosion generated from a single molten metal droplet and measuring the associated pressure waves.