室外风下建筑外立面火溢流阻隔技术研究  

Study on structural barrier to vertical spread of window spill plume along building exterior faade under external wind

作　　者：赵楠[1] 张靖岩[2] 邢雪飞[3] 吴立志[1] 李思成[1] 

机构地区：[1]中国人民武装警察部队学院,河北廊坊065000 [2]住房和城乡建设部防灾研究中心,北京100013 [3]北京工业大学,北京100124

出　　处：《消防科学与技术》2013年第10期1079-1082,共4页Fire Science and Technology

基　　金：国家重点基础研究发展计划项目(973计划)"高层建筑立体火蔓延行为及其阻隔机制"(2012CB719702-3)

摘　　要：以全尺寸双层建筑为火灾试验模型,采用数值模拟的方法,模拟低速及高速侧吹风两种室外风条件下,不同的窗口、窗槛墙及阳台尺寸对建筑外立面开口火溢流蔓延的阻隔情况。运用数值拟合找出不同室外风条件下建筑外立面开口火溢流扩散程度与窗口宽度、窗槛墙高度及阳台伸长之间的相关性。结果表明:低速侧吹风状况下,火溢流顺风斜向上蔓延,阳台宽度起主导阻隔作用;高速侧吹风状况下,火溢流顺风横向蔓延,阳台伸长起主导阻隔作用。Using a full scale 2 storey building as fire experiment model, simulation were conducted to simulate the barrier of window spill plume along building exterior facade on conditions of low-speed and high-speed side-blown wind, and under differ- ent dimensions of windows, windowsill walls and balconies,. Then the correlation between fire spreading near the exterior fa- cade and dimensions of window, windowsill wall and balcony was obtained by numerical fitting and dimensional analyses.The correlation indicates that, on low-speed side-blown wind, spill plume spreading diagonal up downwind, and balcony width plays a leading barrier; on high-speed side-blown wind, spill plume horizontal spreading downwind, and balcony extension plays a leading barrier.

关 键 词：火溢流 窗口 窗槛墙 阳台 室外风 

分 类 号：X913.4[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]