Calculations of Wall Fire Spread in an Enclosure

摘要

Mathematical models of fire growth in enclosures offer a potential for assessing the risk of materials with respect to a hazard such as flashover. The development of a model for fire spread over wall lining materials is presented. The work covers the development of a transient two-layer zone model, initially formulated for crib fires in a room, then adapted to simulate a spreading corner wall fire. The local wall flame spread rate and burning rate per unit are expressed in the model as functions of the external radiation incident upon the burning surface and the oxygen concentration in the adjacent gas layer (zone). Flame spread is limited to the horizontal direction. Results for a fictitious wall lining material are presented. Major elements of the results are shown to be in qualitative agreement with experience. Finally, areas for improvement and the direction of future efforts are noted.