基于正交试验和FDS的狭小面积高空间火灾烟气扩散规律研究  

Research on the Smoke Diffusion Pattern of Fires in Tall Spaces With a Small Footprint Based on Orthogonal Tests and FDS

作　　者：邵芳琦 郭炜辰 李艺群 叶蔚[1,2] SHAO Fangqi;GUO Weichen;LI Yiqun;YE Wei(School of Mechanical and Energy Engineering,Tongji University,Shanghai 201804,China;Key Laboratory of Structural Performance Evolution and Control,Ministry of Education,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学机械与能源工程学院,上海201804 [2]同济大学工程结构性能演化与控制教育部重点实验室,上海200092

出　　处：《安全》2024年第11期45-51,共7页Safety & Security

基　　金：中央高校基本科研业务费专项资金资助(22120220632)。

摘　　要：为提高狭小面积高空间场所的排烟效率,采用正交试验和火灾动力学模拟工具(FDS),对49组工况下的狭小面积高空间场所进行火灾模拟,研究其火灾危险性和烟气扩散规律。结果表明:场所面积和火源位置是影响火灾危险性的主要因素;烟气高度评价指标在评估火灾风险性时更敏感,应优先考虑;在相同时间下,场所面积为50 m^(2)的烟气高度明显低于200 m^(2);在进行狭小面积高空间场所的烟气扩散规律研究时,需综合考虑场所的功能和可燃物情况等因素。研究结果可为类似场所排烟系统优化设计提供参考。To enhance the smoke exhaust efficiency of tall spaces with a small footprint,orthogonal experiments and the Fire Dynamics Simulator(FDS)were employed to simulate fire scenarios in 49 different configurations within such spaces..Fire hazard and smoke diffusion pattern were studied in those simulations.The results indicated that the area of the venue and the position of the fire source are the primary factors influencing fire hazard;the smoke height evaluation index is more sensitive in assessing fire hazard and should be given priority consideration.Under the same time duration,the smoke height in a 50 m^(2)venue was significantly lower than that in a 200 m^(2)venue.Therefore,when studying the smoke diffusion pattern of tall spaces with a small footprint,it is necessary to consider factors such as the function of the venue and the presence of combustible materials comprehensively.The findings provide a reference for the optimized design of exhaust systems in similar venues.

关 键 词：狭小面积高空间 烟气扩散规律 正交试验 火灾动力学模拟工具(FDS) 

分 类 号：X948[环境科学与工程—安全科学] TU834[建筑科学—供热、供燃气、通风及空调工程]