大型室内体育场馆火灾烟气充填及排烟措施研究  

NUMERICAL STUDIES ON FIRE SMOKE DESCENT AND SMOKE EXHAUST METHOD IN A LARGE GYMNASIUM

作　　者：秦挺鑫[1] 郭印诚[1] 林文漪[1] 

机构地区：[1]清华大学工程力学系,北京100084

出　　处：《工程热物理学报》2005年第6期1061-1064,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究专项经费资助(No.2001CB409600)北京市科学技术委员会奥运专项课题(No.H023220050120)科技新星计划项目资助(No.H023620020120)

摘　　要：模拟了大型室内体育场馆火灾烟气的充填过程。对比了不同排烟条件下(自然排烟和机械排烟)烟气沉降过程。数值模拟结果表明,在无排烟情况下,烟气在大空间体育场馆内的温度并不高,但烟气层下降速度很快。对比不同的排烟方式,发现顶棚自然排烟有良好的排烟效果,顶棚机械排烟效果取决于机械排烟速率与自然排烟速率的相对大小。侧壁机械排烟系统只有在烟气蔓延到排烟口以下才有明显的效果,并且在流量大小一定情况下,侧壁排烟口位置和数量对排烟效果没有明显影响。The smoke exhaust capability of different smoke exhaust methods were studied in this paper. The simulation results show that the temperature of the smoke layer is not high, but the descent of the smoke layer is very rapid when no smoke exhaust system. It is found that the smoke exhaust efficiency is very high under the condition of roof natural smoke exhaust method, and the smoke exhaust capability of the roof mechanical smoke exhaust system is decided by the comparison of the mechanical smoke exhaust velocity with the natural smoke exhaust velocity. Under the condition of smoke exhaust system located on the wall, the remarkable smoke exhaust performance was found only when the smoke layer descended under the wall smoke exhaust vent. When the smoke exhaust fluxes are equal in different smoke exhaust systems located on the wall, the horizontal position and the number of the smoke exhaust vents hardly affected the smoke exhaust capability.

关 键 词：火灾 烟气 排烟方式 体育场馆 

分 类 号：TK124[动力工程及工程热物理—工程热物理]