长通道内机械排烟速率对烟气层吸穿影响的数值模拟研究  

A numerical study on smoke layering plugholing under mechanical extraction in a long channel

作　　者：蒋亚强[1] 霍然[1] 胡隆华[1] 纪杰[1] 阳东[1] 王浩波[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,安徽合肥230027

出　　处：《中国科学技术大学学报》2009年第4期424-428,共5页JUSTC

基　　金：国家自然科学基金(50706050)资助

摘　　要：通过数值模拟,分析了长通道内机械排烟时排烟口下方的流场结构、烟气层温度和厚度,定量描述了烟气层厚度、温度与排烟速率之间的关系.结果表明,排烟速率大到一定程度时会导致烟气层吸穿,使得机械排烟效率降低.In a long model channel under mechanical extraction, the flow pattern, vertical temperature distribution and depth of the smoke layer below the extraction vent were analyzed by numerical modeling. The variations of the depth and temperature under different mechanical extraction rates were quantitatively described. The results show that plugholing occurs in the long channel when smoke extraction rate increases to some relative high levels, causing the efficiency of the mechanical extraction system to be reduced.

关 键 词：长通道 机械排烟 吸穿 烟气层厚度 数值模拟 

分 类 号：TU834.27[建筑科学—供热、供燃气、通风及空调工程]