INVESTIGATION OF UNDERWATER THERMAL EXPLOSIONS IN MOLTEN METAL-WATER SYSTEMS

Authors
  1. Ward, C.A.
  2. Stanga, D.
Corporate Authors
Defence Research Establishment Suffield, Ralston ALTA (CAN);Toronto Univ, Toronto ONT (CAN) Dept of Mechanical Engineering
Abstract
Thermal or vapour explosions can be produced when a globule of molten tin is suddenly immersed in liquid water. The mechanism by which such explosions occur has remained unclear but certain characteristics of these explosions have been established. Immediately after the immersion, the molten tin is surrounded by a vapour film, but as the tin cools the mode of boiling on the tin surface changes from film to nucleate boiling. This transition in the mode of boiling occurs at approximately the temperature at which the tin solidifies. If a vapour explosion is to occur, it happens approximately at the same time as the film collapses. Photographic studies of the tin globule just prior to the explosion and studies of the state of the tin after the explosion indicate that water enters the tin and produces the explosion. It is the mechanism by which the water enters the molten tin that has remained unclear. TRUNCATED
Report Number
DRES-CR-57-91 — Contract Report (Final)
Date of publication
15 Nov 1991
Number of Pages
90
DSTKIM No
92-01987
CANDIS No
104872
Format(s):
Hardcopy;Originator's fiche received by DSIS

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