基于锥形量热仪的甘草燃烧性能实验研究

Application of cone calorimeter on study of burning performance of liquorice

采用锥形量热仪对甘草的燃烧性能进行了研究。实验结果表明:甘草容易被引燃,最小引燃辐射强度约为5.882 2 kW/m2;在低辐射强度下,由于甘草表面形成炭化层较厚,形成热量累积,使热释放速率(heatrelease rate,HRR)峰值较大,HRR平均值随热辐射强度的增加而增大,这表明引燃初期甘草的火灾危险性不能忽视;甘草引燃初期,发烟量和CO生成率较大,但随着热辐射强度的增加,发烟量和CO生成率降低。

Burning performance of liquorice were tested by cone calorimeter.The results indicates that liquorice is easy to ignite,the minimum ignition heat flux is 5.882 2 kW/m^2.During the early time of the ignition of liquorice,because the carbonized layer is thick,the peak HRR under lower heat flux is larger,the average HRR increase with the increase of heat flux,which indicates that the early fire risk of liquorice can＇t be ignored.During the early time of the ignition of liquorice,SEA and CO production is larger,which decrease with the increase of heat flux.