Vertical Combustion Characteristics of Cable in Confined Space

Abstract

The experiment of cable combustion characteristics in confined space is carried out by using cable vertical combustion platform for the first time. By changing the confined space distance between the fireproof board and the cable, the law of cable combustion characteristics is obtained. With the increase of the confined space distance, the cable combustion mass loss rate, measured temperature value and measured net heat flow value first increase and then decrease. When the confined space distance is 80 mm, the mass loss rate per unit area is the largest. When the ratio of confined space distance to sample height changes within 0.05-0.25, the change of material combustion mass loss rate is more obvious. Based on the heat balance equation, a mathematical model of the effect of confined space distance on flame net heat flow is established. The experimental results are consistent with the predicted results of the model.