基于FDS的某高速公路隧道火灾数值分析
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密 惠 保
基于FDS的某高速公路隧道火灾数值分析(论文9000字,外文翻译)
摘要
高速公路隧道的修建是为了给交通量大的交通网络减轻压力、提高运输速度和能力的。专用于汽车高速行驶,且其交通量大,所以对高速公路隧道的修建要求很高,这可减少事故,满足现代对公路修建技术较高的要求,符合现在社会发展的步伐。
本次火灾模拟是以某城市隧道为研究对象,基于火灾中流体运动为主要模拟对象的计算流体动力学软件,研究隧道火灾在不同位置起火及不同火焰强度时烟气的流动情况和温度的分布,并在此基础上分析研究人员的安全疏散,确定最优的疏散路线和最合理的消防系统的设置。
在数值模拟的基础上可知,隧道火灾的蔓延速度较快,在长的隧道中温度、烟气蔓延都极大影响了人员疏散和救援。同时,隧道内设置通风排烟设备可以有效阻止烟气回流,使在火灾中可以在隧道中提供一定范围的安全区。
关键词:公路隧道烟气蔓延安全疏散
Numerical Analysis of a Highway Tunnel Fire Based on FDS
Abstract
The highway tunnel was built to relieve pressure and increase transportation speed and capacity for a traffic network with a large traffic volume. It is specially used for high-speed driving of automobiles, and its traffic volume is large. Therefore, the construction of expressway tunnels is very demanding, which can reduce accidents and meet the high requirements of modern highway construction technology, which is in line with the current social development. [资料来源:http://think58.com]
This fire simulation is based on the Tunnel. The computational fluid dynamics software based on the fluid motion in the fire is used to study the flow and temperature of the flue gas when the tunnel fire is fired at different locations and different flame intensities. Distribution, and on this basis, analyze the safety evacuation of researchers, determine the optimal evacuation route and the most reasonable setting of the fire protection system.
On the basis of numerical simulation, it can be seen that the tunnel fire spreads faster, and the temperature and smoke spread in the long tunnel greatly affect the evacuation and rescue of personnel. At the same time, the ventilation and smoke exhausting equipment in the tunnel can effectively prevent the flue gas from flowing back, so that a certain range of safety zones can be provided in the tunnel in the fire.
Keywords: Road tunnel; Smoke flow; Safe evacuation
目录
摘要 I
Abstract II [资料来源:THINK58.com]
目录 III
第一章概论 1
1.1研究背景介绍 1
1.1.1背景 1
1.1.2研究意义 1
1.2国内外研究现状 1
1.3工程概况与实验研究内容 2
第二章隧道防火设计 3
2.1隧道火灾概述 3
2.1.1起火原因 3
2.1.2火灾特点 3
2.2隧道消防设计 3
2.2.1隧道报警系统设计 3
2.2.2隧道排烟系统设计 4
2.2.3隧道灭火系统设计 5
第三章隧道火灾模拟设计 7
3.1模拟软件概论 7
3.1.1FDS简介 7
3.1.2FDS软件在此工程应用 7
3.2隧道模型建立 7
3.3不同隧道火灾场景设计 7
3.3.1火灾规模 7
3.3.2不同火灾场景 8
第四章火灾各场景模拟结果分析 9
4.1 模拟结果 9
4.1.1 入口处起火 9
4.1.2 隧道中间起火 12
4.2 结果分析 14
第五章疏散模拟 15
5.1 人员安全疏散概述 15
5.1.1 安全疏散 15
5.1.2 隧道安全疏散 15
5.2 人员安全疏散 16
5.2.1 疏散安全指标 16
5.2.2疏散分析 17
5.3 隧道安全疏散运作模式 17
第六章总结 18
参考文献 20
致谢 22