Abstract
An experimental study on the characteristics of molten drop and flame spread of metal polyethylene (PE) cladding panel is presented. The parameters investigated include mass loss rate, the mass of the melting part and the average flame height. The effects of fire source power on the flame spread and melt drop are studied. The results show that the sandwich panel combustion can be divided into the surface of the sandwich panel and the dripping combustion. With the increase of power,the time interval between melting drops becomes smaller and the flame pulsation frequency increases. which causes the temperature change range getting larger, the mass loss rate and mass of the melting part and the average flame height increase under all conditions. The mass loss rate and the area of combustion of the metal sandwich panel depend on the degree of surface burning. There is a certain relationship between oil pool fire average flame height, and the distance between sample and the oil pan(D). It is found that when D ≤ 1.4m, with the rise of D. oil pool fire average flame height decreases. However, when D ≥ 1.4m, the fire flame intensity of the oil pool is determined by the number of extinguished droplets before the drops hit the oil pan, and the flame parameters of the oil pool are basically stable. The influence mechanism and law of oil pool fire burning of PE metal sandwich panel insulation materials are revealed.
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