Effect of vehicular blocking scene on smoke spread in the longitudinal ventilated tunnel fire

被引：23

作者：

Luo, Junli ^{[1
]}

Xu, Zhisheng ^{[2
]}

Li, Fulin ^{[2
]}

Zhao, Jiaming ^{[2
]}

机构：

[1] Hunan Radio & TV Univ, Dept Civil Engn, Changsha 410004, Hunan, Peoples R China

[2] Cent South Univ, Inst Disaster Prevent Sci & Safety Technol, Changsha 410004, Hunan, Peoples R China

来源：

CASE STUDIES IN THERMAL ENGINEERING | 2019年 / 14卷

关键词：

Tunnel fire; Blocking scene; Longitudinal ventilation; Smoke spread; CRITICAL VELOCITY; BACKLAYERING LENGTH; BLOCKAGE RATIO; TEMPERATURE; MODEL; DISTANCE;

D O I：

10.1016/j.csite.2019.100495

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In order to investigate the effect of vehicular blocking scene on the smoke spread in the longitudinal ventilated tunnel fire and improve the effectiveness of smoke control scheme, 30 simulation conditions were carried out. The effect of different blockage area ratio, blockage position, and blockage length on the smoke spread were included. The temperature, velocity, and smoke spread characteristics beneath the tunnel ceiling were analyzed. The results showed that the maximum temperature and smoke spread range beneath the tunnel ceiling was affected significantly by the blockage area ratio. The critical velocity was different when the blockage vehicle was located on upstream or downstream of the fire. When the critical velocity was the same, as the blockage length increased, the maximum temperature beneath the tunnel ceiling decreased at first and then increased gradually.

引用

页数：7

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