The boiling liquid collapsed bubble explosion (BLCBE): A preliminary model

摘要

A preliminary physical and mathematical model (along with its associated computer code) has been developed to describe the behaviour of the BLCBE. The transient thermo-hydraulic behaviour of a vertical cylindrical vessel containing a pressure liquefied gas (propane) at 1 MPa initial pressure and 90% initial fill has been simulated with a crack suddenly opening up in the vapour space. Eulerian and Lagrangian coordinate systems have been used to numerically model the time-dependent behaviour of the vapour and liquid regions, respectively. Analyses of the propagation of the depressurization wave (caused by the mass discharge through the crack) and the recompressive wave (caused by the rise in the liquid-vapour interface (due to void generation)), permit the pressure, density and velocity fields in the vapour region and the void fraction and pressure distributions in the liquid region to be predicted.