摘要
通过建立三维仿真模型,研究半横向排烟隧道在火灾发生时,排烟开口在火源上下游不同的分布模式对烟气蔓延效果的影响。通过分析模拟结果可知:随着火源上游排烟开口逐步增加,火源上游烟气逆流长度和蔓延速度均逐步增大,烟气沉降到危险高度2 m以下的范围也有所增长;火源下游的烟气蔓延速度则有所下降但是最终蔓延长度变化不大,下游烟气沉降高度则有所升高。该结论将有助于相关隧道工程消防安全设施的设计和日常运行管理。
A 3D simulation model was built in this paper to investigate the effect of smoke vent arrangements on the smoke spreading result in the tunnel with a semi- horizontal smoke extraction mode. Based on the result,it is found that the reverse flow moves faster and the downstream smoke slower with the increasing number of vents in an upstream of the fire source. Furthermore,the upstream reverse smoke flow distance spreads longer and the downstream smoke flow distance has limited changes. The result of the study provides a basis for the smoke control in the tunnel.
出处
《武警学院学报》
2014年第8期15-18,共4页
Journal of the Armed Police Academy
关键词
隧道火灾
数值模拟
烟气控制
温度分布
tunnel fire
numerical simulation
smoke control
temperature distribution
