Experimental Study on Ignition of EPS Foam by High-Speed Hot Particle
The ignition of building insulation materials by hot particles is an important potential pathway leading to urban-forest fires,and the transport of hot particles from their location to the fuel bed usually has a certain initial velocity,and the phenomenon and mechanism of hot particles igniting polystyrene foam at high speed are still unclear.This study designed an accelerated ignition experimental device for hot particles and tested the ignition process of hot particles with a diameter of 8～16 mm at 13 m/s speeds and different temperatures.The study observed various ignition phe-nomena,including embedded ignition and contact flash fire,and concluded that surface embeddings pose a higher risk of ignition,thereby potentially accelerating flame propagation.The embedding law of particles was found to be closely correlated with particle temperature,and the probability distribution of ignition for high-speed hot particles was obtained for different particle sizes.This study provides important scientific guidance for understanding the ignition process of high-speed hot particles and has practical significance for building fire safety.
firebrandignition probabilitybuilding insulation materialsurban-forest fire
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