FDS基于数值模拟的大空间建筑烟气蔓延特性研究
本毕业论文的研究结果不但为该简易大空间建筑的防火设计提供给了一些依据和指导，而且也可以作为其他大空间建筑火灾安全工程研究的相关参考。
关键词：大空间 建筑 烟气 FDS
Spread Properties of large space-based numerical simulation of Smoke
Abstract：In this paper, FDS model simulates the occurrence of a large space fire smoke spread and analyzes the proper ventilation, smoke exhaust facility under normal conditions spread. Due to the large variety of building structures, structural complexity, larger space, resulting in smoke spread has some peculiarities. That the study of large space smoke spread characteristics, is an important topic of fire research. There were nine contrasts of fire scenarios including different power of fire, different height of building. Simulation results showed that smoke have less, and spread down slowly when the height of 30m and its power was 15MW. Personnel sight not blocked and there is plenty of time for safety evacuation.
The results achieved in the paper not only provided some bases and directions to the fire protection design of this large space building, but also could be regarded as the reference of fire safety engineering research on other large space building.
Keywords：Large space ；Building； Smoke ；FDS
目录
1 绪论 3
1.1 研究背景 3
1.2 国内外的研究现况和发展 4
1.2.1 国内的研究现况和发展 4
1.2.2 国外的研究现况和发展 5
1.2.3 发展前景 5
2 大空间火灾分析的理论基础 6
2.1 火灾动力学基础 6
2.1.1 室内火灾发展过程及特性 6
2.1.2 大空间火灾的特点 7
2.2 FDS数值模拟理论及方法 8
2.2.1 FDS软件简介 8
2.2.2 FDS数值模拟的理论基础 9
2.3 火灾烟气运动机理 10
2.3.1 大空间建筑发生火灾时烟气的蔓延过程 10
2.3.2 大空间建筑发生火灾时烟气的危害 10
3 大空间火灾数值模拟实验 12
3.1 Pyrosim建模 12
3.1.1 模型的建立 12
3.1.2模型网格划分 12
3.1.3 模型的输入条件 12
3.2实验方案及参数设置 13
3.2.1 实验方案 13
3.2.2 模型的参数设置 14
3.3 火灾场景设计 14
3.3.1火源位置设定 15
3.3.2火灾增长速率分析 15
4 大空间火灾烟气运动特性模拟结果分析 17
4.1 火灾场景1 17
4.2 火灾场景2 19
4.3 火灾场景3 20
4.4 火灾场景4 22
4.5 火灾场景5 23
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