火焰与烟气层热辐射的实验与蒙特卡洛法模拟  

Experiments and Monte-Carlo Simulation of Heat Radiation Flux from Flame and Hot Smoke Layers

作　　者：季经纬[1] 李全峰[1] 陈金林[1] 朱国庆[1] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221008

出　　处：《中国矿业大学学报》2008年第1期53-56,共4页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50406026)

摘　　要：高温烟气层和火源的火焰是火灾房间内的主要热辐射源.对多种尺寸房间内的热烟气层,分别采用蒙特卡洛法和理论计算法,求出了室内热烟气层对地板上的微元面、地板面和墙壁的热辐射通量,采用实验与蒙特卡洛法分别测量和计算出柴油油池火焰的热辐射通量.结果表明,蒙特卡洛法计算出的热辐射通量与理论计算值之间的相对误差可控制在5%以内,为保证较高的精度,计算时需选择较大的能束数,并且辐射面之间的面积比不宜过大.采用圆柱形火焰假设计算出的热辐射通量与实验值具有相同的变化趋势和数量级.A layer of hot smoke, and flame are the main heat radiation sources in compartment fires. Both Monte-Carlo and theoretic methods were used to estimate the heat flux from the layer of hot smoke to an infinitesimal element located on the compartment floor and walls of different sized compartments. The heat flux from a diesel-oil pool fire was obtained by experimental and Monte-Carlo methods. The results show that the relative error between the Monte- Carlo and theoretic methods is about 5 %. A large number of energy beams and a small ratio of radiating surface areas must be used during the calculation to obtain precise results. The measured values and calculated values by the columniform flame hypothesis follow similar trends and are the same order of magnitude.

关 键 词：火焰 热烟气层 热辐射通量 蒙特卡洛法 

分 类 号：TD752[矿业工程—矿井通风与安全]