纵向通风水平隧道火灾烟气流动特性研究  

Study of Fire Smoke Flow Characteristics of Horizontal Tunnel Using Longitudinal Ventilation

作　　者：卢平[1] 丛北华[1] 廖光煊[1] 范维澄[1] 厉培德[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230026

出　　处：《中国工程科学》2004年第10期59-64,共6页Strategic Study of CAE

基　　金：国家自然科学基金专项基金资助项目 ( 5 0 3 2 3 0 0 5 )

摘　　要：地铁隧道火灾烟气控制是城市公共安全的一个重要组成部分。在分析地铁隧道火灾烟气流动主要影响因素的基础上 ,将地铁隧道通风和排烟系统作为一个整体考虑 ,引入地铁隧道火灾烟气的浮力效应和热阻效应 ,建立了隧道通风网络火灾模拟的数学模型 ,分析了地铁隧道火灾烟气逆流的临界条件、临界流速、隧道风流及烟流流速与火灾强度的变化关系 。The management of subway tunnel fire smoke is an important component in city public safety. In this paper, on the basis of theoretical analysis of the main factors affecting fire smoke flow in a subway tunnel, the ventilation and exhaust system were considered as a whole and the effects of buoyancy and thermal resistance were introduced. Further, a mathematical model was established to express the relationships between the critical environments, critical velocities, air speeds, smoke speeds and fire intensities. The results can provide instructions for tunnel smoke managements and emergency handling.

关 键 词：地铁隧道 火灾烟气 浮力效应 热阻效应 临界风速 

分 类 号：TU988.12[建筑科学—城市规划与设计]