|本期目录/Table of Contents|

[1]黄有波,吕淑然,杨凯.火源功率与隧道阻塞比对临界风速变化规律影响研究[J].中国安全生产科学技术,2015,11(8):10-15.[doi:10.11731/j.issn.1673-193x.2015.08.002]
 HUANG You-bo,LV Shu-ran,YANG Kai.Study on influence law of fire power and blockage ratio on critical wind velocity in tunnel fire[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(8):10-15.[doi:10.11731/j.issn.1673-193x.2015.08.002]
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火源功率与隧道阻塞比对临界风速变化规律影响研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
11
期数:
2015年8期
页码:
10-15
栏目:
学术论著
出版日期:
2015-08-30

文章信息/Info

Title:
Study on influence law of fire power and blockage ratio on critical wind velocity in tunnel fire
作者:
黄有波 吕淑然 杨凯
(首都经济贸易大学 安全与环境工程学院,北京100070)
Author(s):
HUANG You-bo LV Shu-ran YANG Kai
(School of Safety and Environmental Engineering, Capital University of Economics and Business, Beijing 100070, China)
关键词:
临界风速隧道火灾阻塞比PyroSim纵向通风
Keywords:
critical wind velocity tunnel fire blockage ratio PyroSim longitudinal ventilation
分类号:
X932
DOI:
10.11731/j.issn.1673-193x.2015.08.002
文献标志码:
A
摘要:
临界风速是隧道进行通风排烟设计的重要参数,为了研究火源功率、隧道阻塞比对临界风速变化规律的影响,采用PyroSim火灾动力学模拟工具与经验公式对比分析的方式。建立隧道缩尺寸模型,并对模型网格尺寸划分进行可靠性校验,发现网格尺寸为火源特征直径的十分之一时最可靠。结果表明:模拟临界风速与理论临界风速相吻合,临界风速随火源功率的增加而增大,当火源功率大于某范围时,临界风速开始趋于稳定;临界风速受到列车对隧道阻塞作用的影响,临界风速随着隧道横截面阻塞比的增加而呈线性减小,在阻塞比达到40%时,临界风速趋于稳定。
Abstract:
The critical wind velocity is an important parameter for design of tunnel ventilation and smoke exhaust. In order to research the influence of fire power and tunnel blockage ratio on the variation law of critical wind velocity, the way of comparative analysis between PyroSim fire dynamics simulation tools and empirical formula was applied. The reduced size model of tunnel was established, and the reliability of grid size division in the model was checked. It was found that the most reliable grid size is one-tenth of fire characteristics diameter. The results showed that the simulated critical wind velocity is consistent with the theoretical critical wind velocity. The critical wind velocity increases with the increase of fire power, and it tends to be stable when the fire power is larger than a certain range. The critical wind velocity is affected by the blocking action of train to tunnel. It decreases linearly with the increase of blockage ratio in cross sections of tunnel, and it tends to be stable when the blockage ratio reaches 40%.

参考文献/References:

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备注/Memo

备注/Memo:
国家自然科学基金项目(51474151);首都经济贸易大学研究生科技创新项目
更新日期/Last Update: 2015-09-06