摘要
利用火灾科学国家重点实验室典型小尺寸竖井模拟实验台开展了系列实验,通过改变不同侧向开口位置组合,对竖井内烟气温度进行定量测量,揭示了不同竖井侧向开口位置对烟囱效应的影响程度。实验结果表明:竖井内烟气运动过程是随着竖井结构的不同而变化的,主要取决于进气口及顶部、侧向开口打开情况。该研究较为全面的分析了全封闭竖井、全开放竖井、仅中性面以下侧向开口开放、仅中性面以上侧向开口开放及中性面以下、以上侧向开口均有开放等不同竖井结构内烟气运动规律,进而揭示了不同侧向开口位置组合对烟囱效应的影响程度。
Series experiments are performed in the typical small-scale Vertical Shaft Simulation Worktable in State Key Laboratory of Fire Science. Varying the side opening positions, the smoke temperatures in the vertical shaft are measured corresponding to each position. Thus, the influence of opening position to the chimney effect is demonstrated. Results show that the smoke flow pattern varies with the fire location and the shaft configuration. The smoke flow pattern in different shaft configurations is analyzed, including closed vertical shaft, open vertical shaft, vertical shaft with openings on the side below neutral plane, vertical shaft with openings on the side above neutral plane, and vertical shaft with openings on both sides above and below neutral plane. Thus the influence of opening positions to the vertical shaft is revealed.
出处
《工程力学》
EI
CSCD
北大核心
2008年第9期187-192,共6页
Engineering Mechanics
基金
香港裘挫基金“Active Fire Protection in Supertall Building”(5-2H46)
国家自然科学基金重大国际合作研究项目热-力耦合作用下重大建筑火灾安全基础研究(50320120156)
国家重点基础研究发展规划项目(2001CB409604)
关键词
开口位置
烟气温度
烟囱效应
竖井
中性面
stack effect
opening position on the side
smoke temperature
vertical shaft
neutral plane
