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 ›› 2024, Vol. 43 ›› Issue (3): 309-313.

• • 上一篇    下一篇

基于PyroSim的不同曲率弯曲隧道火灾特性研究

赵晓坤, 倪铭昊   

  1. （山西大同大学 煤炭工程学院，山西 大同 037000）
  • 出版日期:2024-03-15 发布日期:2024-03-15
  • 作者简介:赵晓坤（1989- ），男，山西忻州人，山西大同大学硕士生导师，主要从事安全灾害与防治研究，山西省大同市云冈区新胜街道，037000。
  • 基金资助:
    基金项目：国家自然科学基金项目（51764044）；山西大同大学研究生科研创新项目（23CX51）

Research on fire characteristics of different curvature curved tunnels based on PyroSim

Zhao Xiaokun, Ni Minghao   

  1. (College of Coal Engineering, Shanxi Datong University, Shanxi Datong 037000, China)
  • Online:2024-03-15 Published:2024-03-15

摘要： 为探究弯曲隧道的火灾特性，研究曲率对弯曲隧道火灾烟气蔓延的影响规律，使用火灾动力学模拟软件PyroSim，对不同曲率弯曲隧道的临界风速、温度分布、烟气蔓延规律及顶棚温度衰减规律进行研究。结果表明：在同一火源功率和火源位置的情况下，临界风速与隧道曲率呈正相关性；由于壁面沿程阻力的特殊性，弯曲隧道内高温烟气在隧道内侧的传播速度更快，并且随着火灾持续时间增加，隧道两侧烟气传播速度的差距增大；火灾的顶棚温度衰减与曲率呈正相关，给出了曲率为0.6%、0.5%、0.3%、0.25%、0.14%的顶棚温度衰减预测模型。

关键词: 弯曲隧道, 隧道火灾, PyroSim, 曲率, 临界风速, 顶棚温度

Abstract: In order to explore the fire characteristics of curved tunnels and study the influence of curvature on the smoke spread of curved tunnel fires, the fire dynamics simulation software PyroSim was used to study the critical wind speed, temperature distribution, smoke spread law, and roof temperature attenuation law of curved tunnels with different curvatures. The results show that under the same fire source power and fire source location, the critical wind speed is positively correlated with tunnel curvature; Due to the special resistance along the wall, the propagation speed of high?temperature smoke inside the curved tunnel is faster, and as the duration of the fire increases, the difference in smoke propagation speed between the two sides of the tunnel increases; The temperature attenuation of the roof in a fire is positively correlated with curvature, and a prediction model for roof temperature attenuation with curvature of 0.6%, 0.5%, 0.3%, 0.25%, and 0.14% is provided.

Key words: curved tunnel, tunnel fire, PyroSim, curvature, critical wind speed, roof temperature