热辐射强度对A320客机货舱侧壁板燃烧特性的影响

Effect of Thermal Radiation Intensity on Combustion Characteristics of Cargo Hold Wallboards of A320 Aircraft

为研究热辐射强度对A320客机货舱侧壁板燃烧特性的影响,在不同热辐射强度环境下开展燃烧实验,使用锥形量热仪测量了引燃时间、燃烧时长、生成烟气、热释放速率等参数。结果表明:热辐射强度为30 kW/m2时壁板不会燃烧;引燃时间、燃烧时长均随热辐射强度增大而缩短;热辐射强度增大后,CO、CO2含量峰值升高且峰值时间提前,O2含量则下降更快;产烟率、热释放速率峰值均随热辐射强度增大而升高且峰值时间提前;根据实验数据计算火势增长指数(FGI)和火险潜在指数(FPI)两项火灾危险性评价指标,发现FGI值、FPI值均与热辐射强度成正比。

To investigate the effect of thermal radiation intensity on combustion characteristics of cargo hold wallboards of A320 aircraft,the combustion experiments were conducted under different thermal radiation intensities.The parameters containing ignition time,combustion duration,smoke production and heat release rate were measured by cone calorimeters.The results revealed that wallboards cannot burn when the thermal radiation intensity was 30 kW/m2.The ignition time and combustion duration were shortened with the increase of thermal radiation intensity.When the thermal radiation intensity increased,the peaks of CO and CO2 increased and the peaks were earlier,and the O2 content decreased faster.The peaks of smoke production rate and heat release rate increased with the increase of thermal radiation intensity and the peak time was advanced.Fire growth index(FGI)and fire potential index(FPI)were calculated based on experimental data.It was found that FGI and FPI were directly proportional to the thermal radiation intensity.