This study analyzed a design fire curve in accordance with of an ignition heat source in a compartment. For this purpose, a structure with a 1:3 reduced scale of the ISO 9705 room corner tester was fabricated using fireboard, and the time variant heat release rate was calculated according to the volume of a polyethylene foam combustible. To predict the design fire curve, the exponential equation proposed in a previous study was compared with the heat release rate measured in a fire experiment. The retard index, which is the main factor used to predicting the time required to reach the maximum heat release rate, decreased proportion to the ignition heat source. This relationship was presented in an empirical equation. Especially, the retard index decreased according to the size of the ignition heat source regardless of the volume of the polyethylene foam combustible. By establishing experimental data considering the type and change in the volume of combustibles, the findings of this study can be used to create improved design fire curve prediction models.

这项研究根据车厢内点火热源分析了设计着火曲线。为此，使用火炉制造了ISO 9705房间角落测试仪的比例缩小为1：3的结构，并根据聚乙烯泡沫可燃物的体积计算了随时间变化的放热率。为了预测设计火灾曲线，将先前研究中提出的指数方程式与火灾实验中测得的放热率进行了比较。延迟指数是用来预测达到最大放热速率所需时间的主要因素，它与点火热源的比例下降。这种关系以经验方程式表示。特别，延迟指数根据点火热源的尺寸而减小，而与聚乙烯泡沫可燃物的体积无关。通过建立考虑可燃物类型和体积变化的实验数据，本研究的发现可用于创建改进的设计燃烧曲线预测模型。