Abstract
The mechanism of suppression of vapor explosions by adding inversely soluble polymes in water are studied. The vapor exposion experiments and the cooling experiment of silver test piece are conducted. Polymetric solution, Poly (ethylene oxide : PEO), of concentrations from 0 to 500 wppm, whose viscosity relative to water ranges from 1.00 to 2.00, is used. No vapor explosion is observed in the polymer solution at a higher concentration than 200 wppm. Quench experiments of a silver test piece submerged in the polymer solution or water are performed in order to examine the stability of film boiling. The cause of suppression of the vapor film collapse is concluded be to due to the precipitation of PEO as a gel around the vapor film.
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