Abstract
An engineering model of the upward flame spread along a vertical combustible surface and experimental relationships of wall flame heat transfer, the principal process leading to the flame spread, are described. This model is based on a concept of ignition and flame spread as a result of inert heating of the solid to an ignition temperature. Experiments using porous line gas burners against isothermal and thermally thin walls have resulted in a representation of the distribution of the incident heat flux to wall surface as a function of height divided by a characteristic length representing turbulent flame heights.
