材料热释放速率的试验分析

Experimental Analysis on Heat Release Rate of Materials

材料的热释放速率是决定火灾危害的关键因素.为系统了解热释放速率的性质以及与其他参数间的关系,从锥形量热计的耗氧原理出发,详细阐述了热释放速率的计算,利用锥形量热计研究了几种有代表性的材料分别在不同的辐射能量下的热释放速率.结果表明,热辐射能量与热释放速率成线性的变化规律,与点燃时间开方的倒数成线性关系.

The heat release rate is the key factor that determines fire hazards. In order to find out the characters of heat release rate and their relation with other parameters. The authors introduce the oxygen consumption principle which cone calorimeter applies, and then expound the calculation of heat release rate in detail. The heat release rate of several kinds of representative materials has been studied by means of cone calorimeter in the different irradiances. Test results shows that HRR and TFI^-1/2 vary linearly with the irradiances.