新风管道对火灾烟气扩散的影响研究  

Research on the Effect of Fesh Air Duct on Smoke Propagation

作　　者：冯俊伟[1] 梁栋[1] 莫善军[1] Feng Junwei;Liang Dong;Mo Shanjun(School of Engineering,Sun Yat-sen University,Guangzhou 510006,China)

机构地区：[1]中山大学工学院,广州510006

出　　处：《科技通报》2017年第7期237-239,274,共4页Bulletin of Science and Technology

基　　金：广东省重点实验室建设项目(2014B030301034);广东省科技计划项目(2013B031500008);广州市科技计划项目(2014Y2-00069)

摘　　要：运用火灾动力学模拟软件FDS探究火灾烟气在新风管道中的扩散情况,发现高温烟气可以通过管道蔓延使火场面积增大;被波及房间内有较高的CO浓度和温度以及低能见度,容易使人头痛、眼花和丧失辨别方向能力。通过设置不同工况对比,发现顶送风比侧送风对于人员逃生更安全;增加防火阀可以截断着火房间与主风管连接,使未着火房间免受波及;延长主风管末端直通室外可起到自然排烟的效果,减少其他房间的烟气浓度。Using the FDS to study the effect of fresh air duct on smoke propagation,we found that hightemperature smoke can spread by the duct and increase the fire area.The affected rooms have a high COconcentration and temperature,and a low visibility,which is easy to make people headache,vertigo andloss of orientation ability.By comparing the different setting conditions,we found the roof air supply ismore safety for evacuation than the sidewall air supply.Setting of the fire damper can cut off theconnection between the fire room and the main air pipe.So it can protect the other rooms.The extend airpine through the outdoor can play a natural ventilation effect and reduce the smoke concentration inother rooms.

关 键 词：FDS 新风管道 烟气扩散 防火阀 

分 类 号：X932[环境科学与工程—安全科学]