The Characteristic Analyses of Marine Fire Spread Phenomena by a Pseudo-field Mathematical Model

Abstract

It is necessary to establish the fire safety plan that is secured sufficient time for the evacation of the personnel on board and the crew to engage in fire fighting activities, in the case of a spontaneous outbreak of fire in a ship. For the sake of fire preventive design, the spread phenomena of marine fire have to be grasped entirely by an analysis using the suitable mathematical model in which the governing factors of cell fire should be considered without omission.The pseudo-field model, in which the momentum and heat transport equations are analysed in the diffusion field system, except that the gas balance equations according to oxygen consumption and gas generatation, is proposed as a mathematical model expressing the fire spread phenomena in this paper. The analysis of heat transfer in a cell space takes into account of an anisotropic turbulent flow with the buoyancy effects with a few basic assumption made on some fire properties. In order to invesigate the relation between the combustion characteristics and these governing factors as fire load, some numerical simulations of fire accident in the two-linked cabines were carried out applying of this model. From the results of the numerical calculation, it was clarified the characteristics of fire spread and the validity of the present pseude-field model.