实体建筑轰燃特性大涡模拟可靠性分析  

Reliability study on characteristics of flashover based on large eddy simulation

作　　者：韩如适[1,2,3] 朱国庆[1,2,3] 张国维[1,2,3] 张磊[1,2,3] 

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]中国矿业大学消防工程研究所,江苏徐州221116 [3]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116

出　　处：《消防科学与技术》2013年第5期499-507,共9页Fire Science and Technology

基　　金：江苏省土木工程环境灾变与结构可靠性重点实验室开放基金项目"高大空间建筑非均匀受火钢结构温度场分布与性能化防火设计研究"(JSKL2011YB11)~~

摘　　要：为了验证FDS大涡模拟研究实体建筑轰燃特性的可靠性,利用FDS对某实体建筑轰燃过程中的烟气层温度进行了数值计算;通过开展全尺寸火灾轰燃实验测得了着火房间轰燃过程中的室内温度特性参数。将FDS大涡模拟数值计算结果与实测结果进行对比分析,发现数值计算和实测轰燃过程中烟气层最高温度之间的相对误差约为13.4%,室内轰燃平均温度之间的相对误差约为7.6%;模拟结果和实测数据吻合较好。研究表明,FDS大涡模拟能准确预测室内轰燃温度。The smoke layer temperature of the flashover process in a physical architecture was numerically calculated using Fire Dynamics Simulator(FDS) to verify the reliability of FDS with large eddy simulation on flashover characteristics of physical architectures.Full scale flashover fire test was performed to get room temperature in the flashover process.From the comparison with numerical simulation results and experimental ones,the relative error of maximum temperature of smoke layer in flashover process between numerical calculation and experimental measurement is about 13.4%,and the relative error of average temperature of indoor flashover between them is about 7.6%.Simulation results and experimental data are in good agreement.The results show that FDS with large eddy simulation can accurately predict the temperature of indoor flashover.

关 键 词：室内火灾 轰燃 大涡模拟 可靠性分析 

分 类 号：X913.4[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]