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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

VAPOR EXPLOSION IN THE DROPLET IMPINGEMENT SYSTEM

Get access (open in a dialog) DOI: 10.1615/IHTC11.2280
pages 471-476

要約

In order to investigate the triggering mechanism of vapor explosion, small-scale experiments have been conducted to observe and examine explosive fragmentation characteristics due to thermal interaction between an impinging droplet and a molten alloy pool. The process that initiates vapor explosion was clearly observed in high-speed videotaping frames: a hemispherical water droplet fragmented from the bottom surface where spontaneous bubble-nucleation took place immediately after making direct contact with a molten alloy pool surface, and small particles of the alloy also fragmented and dispersed due to the high pressure that resulted from vapor explosion. Conditions in which vapor explosion occurred were investigated for various initial temperatures of the droplet and molten alloy pool. It is found from wave height for deformed molten alloy surface that explosion intensity diminishes with decreasing droplet subcooling.