走廊烟气填充的数值模拟研究  

A Numerical Study of Smoke Development in a Corridor

作　　者：余明高[1] 郭明[1] 李振峰[1] 裴蓓[1] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003

出　　处：《中国矿业大学学报》2009年第1期20-24,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50476033);河南省高校新世纪优秀人才支持计划项目(2005HANCET-05);河南理工大学研究生学位论文创新基金项目(644001);教育部长江学者和创新团队发展计划项目(IRT0618)

摘　　要：为了研究走廊火灾的烟气填充过程及其规律,运用FDS 4.0火灾动力学程序对全尺度走廊进行火灾烟气模拟.结果表明:烟气前锋与走廊尽头墙壁碰撞前,走廊尽头附近的烟气下降得最慢,而碰撞之后烟气下降得最快,7 s内下降到0.7 m的高度.走廊尽头聚集了较厚的烟气,且距离火源越远,烟气层越厚,逆流现象越明显.通过顶棚下温度分布的模拟结果与实验结果对比可知,两者有较好的吻合,误差在6℃以内.FDS可以应用于预测走廊火灾,同时也说明了本文模拟方法与模拟结果的可靠性.Smoke development during full scale corridor fires was analyzed using a fire dynamics simulator （FDS, Ver 4.0） code. The results show that the rate of smoke lowering is the slowest near the end of the corridor before the impingement of the jet front on the end wall. It is the fastest in the same area after impingement, dropping to 0.7 m in 7 s. The smoke is the thickest near the end of the corridor. The farther the distance is, the thicker the smoke is. A counter current smoke layer is visible. The temperature distribution under the ceiling agrees with the experimental results within 6 ℃. This confirms the suitability of using FDS code for the simulation of corridor fires and the reliability of the simulation results.

关 键 词：走廊烟气 FDS 数值模拟 烟气填充 

分 类 号：X932[环境科学与工程—安全科学]