Study on Wall Fire Spread Characteristics of Polystyrene External Insulation Materials under Different Window Fire Sources

Firstly, the theoretical model of polystyrene external thermal insulation material fires under conditions of window fire was put forward, the equations that calculate the important characteristic parameters of these fires such as the spread height, spread rate and ignition time were derived, and the relevant analyses were preliminarily made. Secondly, on the basis of theoretical analyses, the medium size experiment of external thermal insulation material fires was designed, the effects of size of fire source and dimension of door opening were studied according to the measured data, combining with the theoretical model, the fire spread rates under four most dangerous conditions of window fire were gained, and the relevant change laws were obtained.