Spontaneous ignition of corrugated cardboard under dynamic high radiant flux

作     者：Liu Liu Yan Gu Hong Yang Xing Wang Yang Zhou Xiaogan Dai Yong Han Shanggang Wen Ming Li Congmei Lin Changgen Feng Fei Tang Yushi Wen 

作者机构：Institute of Chemical MaterialsChina Academy of Engineering PhysicsMianyang 621999China State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijing 100081China State Key Laboratory of Fire ScienceUniversity of Science and Technology of ChinaHefei 230026China Institute of Applied Physics and Computational MathematicsChina Academy of Engineering PhysicsBeijing 100088China 

出 版 物：《Defence Technology（防务技术）》 (Defence Technology)

年 卷 期：2024年第40卷第10期

页      面：65-77页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 

基　　金：the Presidential Foundation of CAEP(Grant No.YZJJZQ2023008) the National Natural Science Foundation of China(Grant No.NSFC 12372342)for financial support of this work 

主　　题：Extreme radiation Fire safety Corrugated cardboard Pyrolysis Ignition temperature 

摘      要：Understanding the response of solid combustibles under high radiant fluxes is critical in predicting the thermal damage from extreme *** the more moderate radiant fluxes in conventional hydrocarbon fires,extreme events such as strong explosion,concentrated sunlight and directed energy can generate dynamic radiant fluxes at the MW/m^(2) level,creating a unique threat to *** study investigates the pyrolysis and spontaneous ignition behaviors of corrugated cardboard by using both experimental and numerical methods,under 10-cm dynamic high radiant fluxes ranging from 0.2 to 1.25 MW/m^(2) for 10 *** spontaneous ignition process at dynamic high radiant fluxes was recorded and *** ignition modes were found at the critical radiant flux of 0.4 MW/m^(2),namely hot-gas spontaneous ignition and hot-residue piloted *** latter is not the focus of this paper due to its extremely small probability of *** research reveals that the increase in flux intensity induces shorter delay times for both pyrolysis and ignition,lower ignition energy density,along with a corresponding rise in the critical mass flux and surface temperature at ignition *** simulation results are generally aligned with the experimental findings,despite some divergences may be attributed to model simplifications and parameter *** work contributes to a deeper insight into material behavior under extreme radiation,with valuable implications for fire safety and hazard assessment.