Minimal Ventilation velocity to Control Smoke in Subway Fire

摘要：

Smoke-control of subway fire is always in a developing stage. In Airpak model of a subway platform, 30MW fire is reconstructed, then along with 2 m3/(min· m2) extraction level, 1.0～4.0 m/s longitudinal ventilation is activated to control its smoke back-layer. When ventilation velocity is not less than 2.0 m/s, temperature, mass rate of smoke and air quality stratify upstream fire source, and they level off after the velocity surpasses 2.5 m/s, which implies minimal ventilation velocity to control smoke backlayer exists and it comes out as 2.5 m/s in this case. Compared to critical ventilation velocity in many other studies, minimal ventilation velocity guarantees not only little bum, but also good visibility and low toxicity to evacuee and firefighter, a better index of smoke-control effectiveness in subway fire.

关键词： fire-control subway ventilation stratification temperature mass rate mean age of air

作者: Wen-Zhong Wu Shi-Jun You

作者单位: School of Environment Science and Technology,Tianjin University Tianjin,China

会议类型: 国际会议

会议名称: 2009 International Conference on Measuring Technology and Mechatronics Automation(ICMTMA 2009)(2009年检测技术与机械自动化国际会议)

会议地点: 长沙

会议语种:英文

页码: 808-811

在线出版日期: 2009-04-11（万方平台首次上网日期，不代表论文的发表时间）