地铁车站防烟空气幕阻烟效果模拟研究  

Modeling research on the effect of smoke-preventing air curtain in subway station

作　　者：陈静[1] 袁建平[2] 方正[2] 

机构地区：[1]中国建筑科学研究院,北京100013 [2]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《消防科学与技术》2015年第11期1431-1435,共5页Fire Science and Technology

基　　金：国家自然科学基金资助项目(51204123);武汉地铁集团有限公司科研项目(GS-JZ-229;GS-JZ-230)

摘　　要：以某地铁车站为研究对象，选用FDS建立地铁车站三维模型，模拟研究空气幕宽度为0．3m、射流角度为30°、2MW火灾规模下站厅送风及不同风速防烟空气幕的挡烟效果，研究防烟空气幕的最佳出口速度。模拟得到不同时刻的温度分布、速度矢量分布、能见度分布，对比分析得出：站台火灾时，相比站厅送风，防烟空气幕可以起到更好的阻烟效果；当在楼梯口设置防烟空气幕时，需要封堵楼梯口的侧壁，且防烟空气幕的最优出口速度范围为4～6m／s。Taking a subway station as the research object, a 3D model of the subway station was built by FDS to study the effect of the smoke-preventing air curtain with air support and different flow velocity in the ball. The width of air curtain was 0.3 m, the angle of jet flow was 30° and the fire power was 2 MW. The optimum velocity of the smoke-preventing air curtain was studied. The temperature distribution and velocity vector dis- tribution and visibility distribution were obtained. The comparative analysis of the simulation showed that： when fire was on the plat- form, compared to the air supplying system in the ball, smoke-pre- venting air curtain could perform better in preventing smoke; when the smoke-preventing air curtain was set on upside of the stair, the side wall of the staircase must be blocked. The optimal air curtain velocity was from 4 m/s to 6 m/s.

关 键 词：站台火灾 防烟空气幕 站厅送风 最佳风速 

分 类 号：X913.4[环境科学与工程—安全科学] U231.96[交通运输工程—道路与铁道工程]