摘要
利用锥形量热仪,热辐射强度选取为15~80 kW/m2,采用电火花引燃和无电火花引燃的自燃两种着火方式研究碳纤维/环氧层压板在不同火灾环境下的燃烧特性,对比分析点燃时间、临界热辐射强度、质量损失速率及热释放速率的变化规律。结果表明:随热辐射强度的增大,两种着火方式下碳纤维/环氧层压板的点燃时间缩短,质量损失速率峰值增大,热释放速率峰值增大且达到峰值时间提前;相同辐射强度下,相比于自燃,强制点燃的点燃时间提前、临界热辐射强度降低,热释放速率峰值升高及达到峰值时间提前;随着热辐射强度的增加,着火方式对点燃时间和热释放速率影响逐渐减小。建立了碳纤维/环氧层压板的点燃时间及质量损失速率的数学模型,得到理论临界热辐射强度和气化热。
The cone calorimeter was used to study the combustion characteristics of Carbon/Epoxy laminate under piloted ignition and autoignition under heat flux of 15~80 kW/m2. The ignition time, critical heat flux, mass loss rate and heat release rate werecompared and analyzed. The results showed that with the increase of heat flux, the ignition time of Carbon/Epoxy laminate decreases, the peak mass loss rate increases, the peak heat release rate increases and the time to reach the peak is ahead of schedule. The ignition time, critical heat flux and time to peak heat release rate of aotoignition are all lower than those of autoignition under the same heat flux, the peak heat release rate is higher than that of autoignition.With the increase of heat flux, the effect of ignition mode on the ignition time and heat release rate decrease. The ignition time and mass loss rate mode of carbon/epoxy laminate were established, the theoretical critical heat flux and the heat of gasification were obtained.
作者
李金都
徐艳英
王志
LI Jin-du;XU Yan-ying;WANG Zhi(Liaoning Key Laboratory of Aircraft Fire Explosion Control and Reliability Airworthiness Technology,School of Safety Engi neering,Shenyang Aerospace University,Liaoning Shenyang 110136,China)
出处
《消防科学与技术》
CAS
北大核心
2019年第9期1282-1285,共4页
Fire Science and Technology
关键词
碳纤维/环氧层压板
锥形量热仪
强制点燃
自燃
燃烧特性
Carbon/Epoxy laminate
cone calorimeter
forced ignition
autoignition
combustion characteristic
