机械送风与自然排烟结合的中庭火灾烟气控制  

Smoke control in atrium with combination of mechanical air supplying and natural smoke exhausting

作　　者：陈星星[1] 童艳[1] 郑浩[1] 吴婷[1] 彭俊欢 

机构地区：[1]南京工业大学城市建设与安全工程学院,江苏南京210009

出　　处：《消防科学与技术》2015年第6期743-747,共5页Fire Science and Technology

基　　金：江苏省普通高校研究生科研创新计划项目(CXLX13_419)

摘　　要：开展建筑中庭火灾时利用顶部开口自然排烟,结合中上部机械侧送风防止烟气下沉的可行性研究。搭建1/10的缩尺模型中庭,顶部开口,多组送风口设置于双侧墙中上部,进行多种工况下的温度、风速与烟气沉降的测试,并利用FDS进行火灾数值模拟。试验与模拟结果均表明:顶部开口起到良好的自然排烟作用;自然排烟与机械送风结合的模式下,当送风速度达到1.3m/s、每侧射程达到送风方向中庭尺寸的3/7、风机开启时间30s时,烟气层高度始终维持在0.4m以上,可以保障人员安全疏散。The feasibility study on smoke control in atrium with combination of natural smoke exhaust by top opening and me chanical air supply at the middle or upper space was conducted. A 1/10 model experiment bench was set up, where the top opening and multi group air inlets were arranged on the middle and upper of double sides of the wail,in order to test the temperature, wind speed and smoke spread under many conditions, and FDS was adopted to simulate the fire. Both results of the experiment and numerical simulation showed that the top opening had a good effect on natural smoke exhaust;under the pattern of combination of mechanical air supplying and natural smoke exhausting, when the speed of air supply reached 1. 3 m/s, the range of each side reached 3/7 of atrium size in air supply direction and the open time of fan was 30 s, the height of smoke layer could be maintain above 0. 4 m, which could guarantee safe evacuation of people.

关 键 词：中庭 火灾 自然排烟 机械送风 模型试验 数值模拟 

分 类 号：X913.4[环境科学与工程—安全科学] TU834[建筑科学—供热、供燃气、通风及空调工程]