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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

STUDY ON TRANSIENT HEAT TRANSFER OF FILM BOILING DUE TO ARRIVAL OF PRESSURE SHOCK

Get access (open in a dialog) DOI: 10.1615/IHTC7.1290
pages 403-408

Sinopsis

Vapor explosion which is occasionally occurred in the liquid-liquid mixing with high temperature difference is believed to be triggered by the collapse of vapor film blanketting hot liquid, probably due to shock type pressure wave from an initially small interaction or condensation pulse.
To make clear the effect of the shock wave on the vapor explosion, transient heat transfer from an electrically heated Pt ribbon, initially in film boiling was studied experimentally and analytically, immediately after passage of the pressure wave 0.1 ~1.5MPa overpressure and 0.1~7.5ms rise time. Two types for transient heat transfer under the shock were observed, which correspond to the non-collapse and the collapse of the vapor layer. Based on the sensitivity survey for the peak heat flux under various conditions of the shock pressure and temperature of the heater, the role of the shock wave to the vapor explosion is discussed.