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- Title
水平交叉隧道间夹角对火灾烟气特征参数分布的影响研究.
- Authors
刘 轩; 王新祥; 马烨红; 朱靖哲
- Abstract
The impact of the angle between horizontal crossing tunnels on the fire smoke flow behavior was studied by numerical simulation. The smoke concentration, smoke layer height, and the maximum temperature distribution beneath the ceiling in the main tunnel were analyzed with the fire source in the branch tunnel. The results show that with the decreasing of the angle, the smoke concentrations in the main tunnel at the two sides of the crossing point are asymmetry, and the smoke concentration at the left side (obtuse angle side) is larger than that at the right side (acute angle side). However, the angle has no significant effect on the smoke layer height. The smoke maximum temperature beneath the ceiling at the left side is larger than that at the right side. The maximum temperature at the left side increases with the decreasing of the angle, and the maximum temperature at the right side decreases with the decreasing of the angle. Based on the conservations of mass and momentum of the smoke plume, the evolution mechanisms of the smoke concentration and smoke maximum temperature beneath the ceiling under various angles are revealed.
- Subjects
SMOKE plumes; TUNNEL ventilation; CONSERVATION of mass; TEMPERATURE distribution; SMOKE; TUNNELS
- Publication
Guangdong Architecture Civil Engineering, 2022, Vol 29, Issue 3, p33
- ISSN
1671-4563
- Publication type
Article
- DOI
10.19731/j.gdtmyjz.2022.03.009