客机隔热隔声棉点火特性与产烟毒性研究

Study on ignition characteristics and smoke toxicity of thermal and sound insulation cotton in airliner

为研究客机隔热隔声棉点火特性与产烟毒性,使用相关装置进行了试验研究。结果表明:点火持续时间和辐射板温度均对隔热隔声棉点火具有明显促进作用。点火持续时间越长,火焰沿Y轴蔓延距离越大,点火15 s时,明火附近区域的隔热隔声棉出现被烧穿现象,但烧穿面积不大。火焰沿Y轴蔓延距离增长速率却随点火持续时间的增大而减小,验证了隔热隔声棉的隔热效果。辐射板温度在700~820℃范围内越大,火焰沿Y轴蔓延距离的增幅就越小,说明热辐射对样品燃烧的促进作用比明火火源的加热作用小很多。当样品质量为75 g时生成的一氧化碳(CO)毒气体积分数达到0.041%,该值已经对人体构成威胁,而样品质量在5~75 g范围内越大,燃烧产生的CO毒气体积分数便越大。研究结果对认识客机隔热隔声棉燃烧点火特性和产物毒性具有重要意义。

In order to study the ignition characteristics and smoke toxicity of thermal and sound insulation cotton on airliner,experimental study was carried out using related devices.The results showed that both the ignition time and the temperature of the radiant panel can significantly promote the fire of thermal and sound insulation cotton.The longer the ignition time,the greater the distance the flame spread along the Y axis.When the flame was ignited for 15 seconds,the thermal and sound insulation cotton in the area near the open flame was burned through,but the burn-through area was not large.The growth rate of the flame propagation distance along the Y axis decreased with the increase of the ignition time,which verified the thermal insulation effect of the thermal and sound insulation cotton.The larger the temperature of the radiant panel within the range of 700℃to 820℃,the smaller the increase of the flame spreading distance along the Y axis,indicating that the thermal radiation promoted the combustion of the sample with the heating effect much less than that of the open flame source.When the mass of the sample was 75 g,the concentration of the generated carbon monoxide(CO)gas reached 0.041%,which posed a threat to the human body,and the larger the sample mass within the range of 5 to 75 g,the greater the integral number of CO gas generated by combustion.The research results are of great significance for understanding the combustion and ignition characteristics of thermal and sound insulation cotton and the toxicity of the products.