Risk analysis of near-surface vapour cloud explosion basing on its fluid dynamics consequences

摘要

The proposed study is aimed at risk analysis of fluid dynamics consequences (large- scale fluid dynamics flows and near-ground winds) induced by vapour cloud explosion. Three major accidents involving hydrocarbon vapour cloud explosions are compared from the viewpoint or their effects and con-sequences. Importance of taking into account the fluid dynamics of vapour cloud combustion and the strong afterwinds generated by the freball is demonstrated by case history studies and by mathematical modelling of the unconfined fuel cloud behaviour and deflagration. Results of CFD modelling of large-scale propane vapour cloud combustion upon central and peripheral ignition are presented.