主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2025, Vol. 44 ›› Issue (6): 783-789.

• • 上一篇    下一篇

夹角影响下双坡式建筑顶棚羽流射流行为研究

许楚楚1, 郭世恩2, 王继贇3,4,5, 黄萍1   

  1. （1.福州大学 环境与安全工程学院，福建 福州 350108； 2.福清核电有限公司，福建 福州 350300； 3.应急管理部天津消防研究所，天津 300381； 4.工业与公共建筑火灾防控技术应急管理部重点实验室，天津 300381； 5.天津市消防安全技术重点实验室，天津 300381）
  • 收稿日期:2024-08-16 修回日期:2024-10-10 出版日期:2025-06-24 发布日期:2025-06-15
  • 作者简介:许楚楚，福州大学安全与环境工程学院硕士研究生，主要从事火灾方面的研究，福建省福州市福州大学城乌龙江北大道2号，350108。
  • 基金资助:
    中国科学与技术大学火灾科学国家重点实验室开放课题（HZ2024-KF07）；2023年福州大学教育教学改革研究项目（FYJG2023023）

Influence of secondary security check on safety evacuation of underground transfer hall of a railway passenger station

Xu Chuchu1, Guo Shien2, Wang Jiyun3,4,5, Huang Ping1   

  1. (1. School of Environmental and Safety Engineering, Fuzhou University, Fuzhou Fujian 350108,China; 2. Fuqing Nuclear Power Co. Ltd., Fuzhou Fujian 350300, China; 3. Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China; 4. Laboratory of Fire Protection Technology for Industry and Public Building of MEM, Tianjin 300381, China; 5. Tianjin Key Laboratory of Fire Safety Technology, Tianjin 300381, China)
  • Received:2024-08-16 Revised:2024-10-10 Online:2025-06-24 Published:2025-06-15

摘要： 本文通过试验和数值模拟研究了双坡式建筑顶棚羽流射流火灾行为特性，分析了顶棚夹角对顶棚下方温度分布及羽流流动卷吸行为的影响。结果表明，在水平顶棚条件下，射流温度从撞击点开始向外围逐渐降低。随着顶棚夹角减小，射流温度的变化趋势表现为：随着与撞击点距离的增加，无论是在屋脊还是斜坡方向上，射流温度均呈现出先升高后下降的特征，即双坡式顶棚在羽流撞击点区域出现局部低温区的现象。特别是在火源功率较大、顶棚夹角较小时，该低温区现象更加明显。此外，双坡式顶棚结构会限制羽流沿斜坡方向的流动，角度越小，羽流在斜坡方向受到的抑制作用越强，导致羽流更多沿屋脊方向扩展。采用数值模拟方法量化揭示了双坡式顶棚对空气卷吸的限制作用，发现随着角度减小，顶棚下方单位长度空气卷吸量不断降低。研究对于双坡式顶棚建筑防火设计具有指导意义。

关键词: 双坡式顶棚, 顶棚羽流射流, 数值模拟, 低温区, 羽流流动卷吸

Abstract: In this paper, the behavior characteristics of jet fire in double slope building ceilings were studied through experiments and numerical simulations, and the effects of ceiling angle on the temperature distribution below the ceiling and plume flow entrainment behavior were analyzed by experiments and numerical simulation. The results show that the jet temperature gradually decreases from the impact point to the periphery under the horizontal ceiling condition. With the decrease of the ceiling angle, the variation trend of the jet temperature is as follows: with the increase of the distance from the impact point, both in the ridge and slope direction, the jet plume temperature presents the characteristics of first increasing and then decreasing, that is, the phenomenon of local low temperature area in the area of the plume impact point of the double-slope ceiling. Especially when the power of the fire source is large and the angle of the ceiling is small, the phenomenon of the low temperature zone is more obvious. In addition, the double-slope ceiling structure will restrict the flow of the plume along the slope direction, and the smaller the angle, the stronger the inhibition effect of the plume in the slope direction, resulting in more plume spread along the ridge direction. Numerical simulation is used to quantify the limiting effect of double-slope ceiling on air entrainment. It is found that the air entrainment per unit length under the ceiling decreases with the decrease of angle. The research in this paper is of guiding significance for the fire protection design of double-slope ceiling.

Key words: double-slope ceiling, ceiling plume jet, numerical simulation, low temperature area, plume flow entrainment