海底公路隧道火灾数值模拟  

Fire simulation of cross harbour tunnel

作　　者：傅伟斌[1] 康溪[1] 

机构地区：[1]厦门市消防支队,福建厦门361012

出　　处：《消防科学与技术》2010年第12期1068-1070,共3页Fire Science and Technology

摘　　要：利用FDS对某海底公路隧道进行研究,分析典型火灾条件下,纵向通风对热烟气逆流距离、隧道顶部温度以及隧道内横通道风流变化的影响。结果表明,在0.25 m/s的火灾初期通风条件下,热烟气逆流距离和火源附近拱顶温度超过安全临界温度的范围随火灾规模增大而增大;在3 m/s的灭火期通风条件下,两者随着纵向通风风速增加而减小;隧道内横通道风速先增大,后减小。FDS was used to research the cross harbour tunnel＇s hot smoke control under the typical fire condition,and 3 aspects were analyzed principally： the impact of vertical ventilation on the up stream distance of hot flue gas;the impact of vertical ventilation on the tunnel roof temperature;the airflow changes in the cross aisles.The results showed that in the condition of 0.25 m/s ventilation,and initial stages of fire,the up stream distance of hot flue gas and the area of tunnel roof temperature above critical temperature increase with the fire size;in the condition of 3 m/s ventilation,and distinguishing stage of fire,they decrease with the air flow rate;air flow rate of cross aisle increases first,then decrease.

关 键 词：海底隧道 火灾 数值模拟 烟气控制 

分 类 号：X913.4[环境科学与工程—安全科学] U459.5[建筑科学—桥梁与隧道工程]