热薄型材料复印纸点燃模型的试验研究

Experimental study on ignition models of thermally thin material(copy paper)

热薄型材料相比热厚型材料在火灾初期更易点燃,因此研究热薄型材料的点燃对于预防火灾的发生及蔓延具有重要意义。利用锥形量热仪以复印纸为试样进行了试验测试,得到试样在不同热辐射强度下的点燃时间,并将试验结果与之前的理论模型进行对比验证。试验结果更符合线性热损失的点燃模型,该模型还提供了临界辐射热通量的计算公式,其数值和试验值相吻合。线性热损失的点燃模型可用来预测热薄型材料在不同热辐射强度下的点燃时间。

Thermally thin material is more easily ignited than thermally thick material does in the initial stage of fire disaster, so studying the ignition models of thermally thin material has important significance to preventing fire. Cone calorimeter （CONE） was used to test the ignited time of copy papers in different heat fluxes. And the tested ignited time was contrasted with that computered by the theoretical models. The ignition model of linear processing heat loss was well consistent with the test result,which can provide the calculating formula of critical heat flux, and the the calculated values and experimental values coincided very well. Therefore, the ignition model of linear processing heat loss can be used to predict the ignited time of thermally thin material under different heat radiation intensity.