摘要
将计算机数值模拟技术应用于火灾调查研究,采用大涡模拟方法重现国内某商场的火灾发展过程,根据现场勘查结果设置边界条件,分别对两个可能的起火点建立场景模型进行数值模拟。将关键部位单位距离不可见度、温度及热通量发展趋势等参数结算结果数据与火灾现场勘测结果及证人证词进行比较,排除了不合理的起火点,验证了另一种情况的正确性,解决了火灾现场勘测无法确定的难题,完善了火灾调查结论。根据计算再现的火灾蔓延过程,可寻找延缓火势蔓延和降低火灾损失的方法。
This paper described the results of numerical simulation using LES that were performed to provide insight on the fire and smoke spread which occurred during a fire. Two model scenarios, which best represented the actual building geometry, material thermal properties, and fire behavior based on information and photographs from fire site reconnaissance, were developed. Two possible fire sources were set separately. By comparing the trends of obscumtion per meter, fire and heat flow spread of simulation results of key parts with the fire site reconnaissance results, one possible fire source was eliminated while the other one' s accuracy was proved. Based on the numerical investigation of this fire accident, methods to retard the fire spread and to reduce the damage of fire and fire investigation can be developed.
出处
《中国安全生产科学技术》
CAS
2007年第6期8-12,共5页
Journal of Safety Science and Technology
基金
国家自然科学基金(50476027
50676091)
国家科技支撑计划专题(2006BAK06804-2)
中国科学技术大学青年基金项目资助
关键词
建筑火灾
火灾调查
大涡模拟
火灾重构
building fire
'fire investigation
LES
fire reconstruction