中国安全科学学报 ›› 2023, Vol. 33 ›› Issue (8): 77-83.doi: 10.16265/j.cnki.issn1003-3033.2023.08.2156

• 安全工程技术 • 上一篇    下一篇

隧道运动体火灾温度分布及烟气输运特性

安伟光1,2(), 广大庆1   

  1. 1 中国矿业大学 江苏省城市地下空间火灾防护高校重点实验室,江苏 徐州 221116
    2 徐州高新区安全应急装备产业技术研究院,江苏 徐州 221116
  • 收稿日期:2023-02-20 修回日期:2023-05-22 出版日期:2023-10-08
  • 作者简介:

    安伟光 (1986—),男,河北无极人,博士,教授,博士生导师,主要从事重大基础设施火灾安全及应急救援方面的研究。E-mail:

  • 基金资助:
    国家自然科学基金资助(51974298); 国家自然科学基金资助(52374244); 中央高校基本科研业务费专项资金项目(2021ZDPYYQ004); 中国矿业大学双一流建设自主创新项目(2022ZZCX05K02); 中国矿业大学教学研究项目(2022ZDKT02-208)

Temperature distribution and smoke transport characteristics of moving body fire in tunnel

AN Weiguang1,2(), GUANG Daqing1   

  1. 1 Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou Jiangsu 221116, China
    2 Xuzhou High-tech Zone Safety Emergency Equipment Industrial Technology Research Institute, Xuzhou Jiangsu 221116, China
  • Received:2023-02-20 Revised:2023-05-22 Published:2023-10-08

摘要:

为探究火源功率对隧道运动体火灾的影响,运用计算流体力学(CFD)软件Fluent模拟研究隧道内温度分布及烟气输运特性,建立隧道顶棚最高温度和平均温度随运动体运行距离衰减的预测模型。结果表明:火源功率越大,顶棚温度越高,高温区面积和影响范围也越大,火源后方出现卷吸燃烧形成的涡旋团流,使得温度分布和烟气输运在垂直空间内呈现出与静止火源不同的规律,同时烟气扩散范围和含量随火源功率增大而增大;在整个运动过程中,隧道顶棚最高温度与运动体在隧道内的运行距离呈3次多项式函数关系,而平均温度则与之呈线性函数关系。

关键词: 隧道运动体火灾, 火源功率, 温度分布, 烟气输运, 数值模拟

Abstract:

In order to explore the influence of fire source power on tunnel moving body fire, the computational fluid dynamics (CFD) software Fluent was used to simulate the temperature distribution and smoke transport characteristics in the tunnel. The prediction model of the maximum and average temperature of the tunnel ceiling with the running distance of the moving body was established. The results show that the greater the fire source power, the higher the ceiling temperature, and the larger the area and influence range of the high temperature zone. The vortex flow formed by entrainment combustion appears behind the fire source, which makes the temperature distribution and smoke transport show different rules from the static fire source in the vertical space. At the same time, the diffusion range and content of smoke increase with the increase of fire source power. During the whole movement process, the highest temperature of the tunnel ceiling has a cubic polynomial function relationship with the running distance of the moving body in the tunnel, while the average temperature has a linear function relationship with it.

Key words: moving body fire in tunnel, fire source power, temperature distribution, smoke transport, numerical simulation