UTLT类隧道半横向排烟方式下排烟阀参数及排烟量对排烟效果影响  

The Parameters of Smoke Exhaust Valve and the Amount of Smoke Exhaust in UTLT Tunnel with Semi-horizontal Smoke Exhaust Mode Affect the Smoke Exhaust Effect

作　　者：李彪 冯炼[1] Li Biao;Feng Lian(Southwest Jiaotong University,School of Mechanical Engineering,Chengdu,610031)

机构地区：[1]西南交通大学机械工程学院

出　　处：《制冷与空调（四川）》2019年第6期577-581,共5页Refrigeration and Air Conditioning

摘　　要：为了解和掌握半横向通风排烟模式下城市地下交通联系隧道的火灾工况变化规律,基于FDS数值模拟软件,以某城市地下交通联系隧道实际工程作为研究对象,建立全尺寸的隧道物理模型。通过分析对比不同排烟阀面积、不同排烟阀开启个数、不同排烟阀间距及不同排烟速率大小的四种排烟方案下隧道内烟气温度场及烟气蔓延范围分布规律变化,探究了不同工况下各参数对火灾烟流特性的影响。结果表明,在半横向通风排烟模式下选取排烟阀面积大小为3m^2、排烟阀间距为24m、排烟阀开启个数为6个以及设置排烟速率为60m^3/s时,隧道火灾烟流控制效果较好。In order to understand and master the changing law of fire conditions in urban traffic link tunnel under semi-lateral ventilation mode,this paper based on FDS numerical simulation software,taking the actual project of urban traffic link tunnel of a city as the research object,and establishing full-scale tunnel physics Model.By analyzing and comparing the distribution of smoke temperature field and smoke spread range under the different smoke exhaust valve area,the number of different exhaust valve opening,the different exhaust valve spacing and the different smoke exhaust rate of the tunnel.The changes were explored to investigate the effects of various parameters on fire smoke characteristics under different working conditions.The results show that in the semi-horizontal ventilation and exhaust mode,the area of the exhaust valve is 3m^2,the distance between the exhaust valves is 24m,the number of exhaust valves is 6,and the exhaust rate is 60m^3/s,the smoke flow control effect of tunnel fire is the best.

关 键 词：UTLT类隧道 半横向通风排烟 数值模拟 烟流特性 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]