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 ›› 2021, Vol. 40 ›› Issue (9): 1305-1308.

• • 上一篇    下一篇

断面宽度对纵向通风隧道火风压影响研究

王益坚1，黄亚东2，胡 卫3，朱 凯4   

  1. 1. 杭州市运河综合保护开发建设集团有限责任公司，浙江 杭州310016； 2. 浙江省消防救援总队，浙江 杭州 310005；3. 杭州运河集团建设管理有限公司，浙江 杭州 310000； 4. 中国计量大学 质量与安全工程学院，浙江 杭州 310018
  • 出版日期:2021-09-15 发布日期:2021-09-15
  • 作者简介:王益坚（1969-），男，浙江临海人，杭州市运河综合保护开发建设集团有限责任公司副总经理，高级工程师，硕士，主要从事城市隧道建设与运营管理，浙江省杭州市江干区天城路85号，310016。
  • 基金资助:
    浙江省重点研发项目（2018C03029）；浙江省建设科研项目（2020K121）

Research on effect of section width on fire wind pressure in longitudinal ventilation tunnel

WANG Yi-jian1, HUANG Ya-dong2, HU Wei3, ZHU Kai4   

  1. Hangzhou Canal Comprehensive Protection Development and Construction Group Co., Ltd., Zhejiang Hangzhou 310016, China; 2. Zhejiang Fire and Rescue Brigade, Zhejiang Hangzhou 310005, China; 3. Hangzhou Canal Group Construction Management Co., Ltd., Zhejiang Hangzhou 310000, China; 4. School of Quality and Safety Engineering, China Jiliang University, Zhejiang Hangzhou 310018, China
  • Online:2021-09-15 Published:2021-09-15

摘要： 针对不同断面宽度隧道中发生火灾时的火风压变化问题，利用Fluent软件模拟隧道内发生火灾的情况，分析隧道宽度对临界风速的影响以及隧道宽度、火源功率和通风速度对火风压的影响。研究表明，火源功率较小时，宽度越小的隧道，临界风速越大；随着火源功率的增大，临界风速之间的差距减小。火风压中火区绕流阻力和热烟摩阻增量会随着风速的增大而相互作用。导致火风压会先随风速的增大而增大，到达一个峰值后会随着风速增大而减小，最后当通风速度增大到临界风速后趋于稳定的数值。随着隧道宽度的增大，通风速率对火风压的影响逐渐减弱。建立不同宽度隧道在不同通风速率和火源功率下的隧道火风压计算公式，为隧道火灾通风设计提供参考。

关键词: 隧道宽度, 纵向通风, 临界风速, 火风压, Fluent

Abstract: Aiming at the change of fire and wind pressure when a fire occurs in tunnels with different cross-section widths, Fluent software is used to simulate the occurrence of fire in the tunnel, and the influence of the tunnel width on the critical wind speed is analyzed, as well as the influence of the tunnel width, fire source power and ventilation speed on fire wind pressure. Research shows that when the power of the fire source is small, the tunnel with a smaller width has a larger critical wind speed; as the power of the fire source increases, the differences between the critical wind speeds decreases. About the fire wind pressure, the two factors, namely, the flow resistance around the fire zone and the increase in hot smoke friction resistance, interact with each other as the wind speed increases. As a result, the fire wind pressure will first increase as the wind speed increases, then decrease as the wind speed increases after reaching a peak value, and finally stabilize when the ventilation speed increases to the critical wind speed. With the increase of tunnel width, the influence of ventilation rate on fire wind pressure decreases gradually. The calculation formulas of tunnel fire wind pressure for different width tunnels under different ventilation rates and fire source power were established, which provided a reference for tunnel fire ventilation design.

Key words: tunnel width, longitudinal ventilation, critical velocity, fire wind pressure, Fluent