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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

A PHOTOGRAPHIC STUDY OF VAPOR EXPLOSION USING SINGLE DROPS OF MOLTON LiN03 SUBMERGED IN ETHYL ALCOHOL

Get access (open in a dialog) DOI: 10.1615/IHTC9.3880
pages 265-270

Abstract

The propagation and the fragmention processes of a vapor explosion are studied by high-speed photography and pressure trace measurement using single drops of molten LiN03 submerged in tapped ethyl alcohol. The propagation phenomena induced by the spontaneous collapse of a vapor film is clearly photographed. The pressure trace is shown to be similar with those obtained in triggered explosion, which has three typical peaks and depressed periods. The pictures showing detailed configurations are also presented.
A single drop explosion is realized in a two-dimensional channel and the fragmentation process is observed. Two stages of the process are shown to exist. Rough fragmentation develops at the first stage which follows the vapor film collapse with a small pressure peak. Fine fragmentation develops at the second stage, when the second pressure peak generates accompanying with rapid growth of a vapor bubble. A phenomenological modeling of a vapor explosion is presented.