|本期目录/Table of Contents|

[1]孟超,赵晶.居室天然气泄漏扩散过程仿真研究[J].中国安全生产科学技术,2011,7(5):153-158.
 MENG Chao,ZHAO Jing.Study on simulation of leakage and diffusion process for natural gas in residence[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2011,7(5):153-158.
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居室天然气泄漏扩散过程仿真研究()
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
7
期数:
2011年5期
页码:
153-158
栏目:
职业安全卫生管理与技术
出版日期:
2011-05-30

文章信息/Info

Title:
Study on simulation of leakage and diffusion process for natural gas in residence
文章编号:
1673-193X(2011)-05-0153-06
作者:
孟超赵晶
首都经济贸易大学安全与环境工程学院,北京? 100053
Author(s):
MENG Chao ZHAO Jing
Capital University of Economics and Business, Beijing? 100053, China
关键词:
居室天然气泄漏扩散仿真
Keywords:
residence natural gas leak out simulation
分类号:
X913
DOI:
-
文献标志码:
A
摘要:
目前,我国城市燃料的结构随着我国环保要求的提高在逐步改变。城市燃料的主体是液化石油气、人工煤气和天然气等气体燃料。在这些可燃气体中,天然气很具代表性,也是目前居民区应用最广泛的燃料。天然气及其产品极易燃烧,其最小点火能量很低,一旦泄漏,即使遇到像电气火花这样的微小能量也能被点燃。而且天然气的爆炸浓度极限很低,稍有泄漏,极易与空气形成爆炸性混合气体,遇明火或静电火花就会发生火灾和爆炸。天然气火灾易于扩散,火灾发生后极易出现很大的过火面积,如果若灭火措施不当,就会造成复燃、复爆。天然气泄漏以及火灾爆炸事故已经成为公众严重威胁,同时对参与救援的消防人员的生命安全也构成看很大的威胁。随着天然气用量的不断增加,天然气泄漏造成的火灾爆炸的事故次数也在不断上升。因此,天然气管道泄漏扩散问题已经成为城市安全领域备受关注的热点问题。为了能更有效的控制天然气事故的发生,就需要深入研究天然气使用中的各种安全隐患,以及天然气泄漏后扩散的途径和扩散的规律。本文针对天然气在居室泄漏后扩散的发生、发展过程及影响因素分析,并对泄漏形成的浓度场进行了模拟计算,对预防居室火灾的发生及控制具有重要意义。为了系统的研究居室内天然气泄漏扩散的过程和发展,为预防居民家庭天然气火灾和爆炸事故以及发生事故后的应急提供依据,本文以普通的居民居住条件为研究对象,通过对国内外各种气体扩散模型的学习和研究,兼顾天然气居室泄漏的特点,根据计算流体动力学原理,建立居室厨房天然气泄漏扩散几何模型。并通过Fluent软件对室内天然气泄漏后的扩散状态进行仿真模拟,得到天然气泄漏后的室内扩散过程,以及在不同时间内存在爆炸极限的区域和厨房达到爆炸极限的范围。并对爆炸后果进行评估。
Abstract:
Along with our country urban environment protection’s enhancement, the urban fuel structure gradually is also changing. The natural gas took one kind cleanly, the highly effective energy already to become the resident to apply the most widespread fuel. Along with natural gas user’s unceasing increase, its accident number of times unceasingly is also rising. For in system’s research the natural gas drain diffusion’s process and the development in resident, after to prevent the natural gas fire and the explosion accident as well as have the accident emergency to provide the basis, this article take the ordinary resident conditions as the objects of study, establishes natural gas leak out diffusion geometric model in the residence. And carries on the simulation after the residence natural gas divulging disperse state, after obtaining the natural gas leak out diffusion process in the residence, as well as has the explosive limit in the different time, and the consequences of the assessment. Result demonstration: In establishes under the condition, after divulging occurs 640s, the refrigerator power source place achieves the detonation lower limit, when 790s achieves the detonation upper limit; Its explosion energy has achieved causes the large-scale steel frame disarrangement of the structure, the majority of personnel die degree. After divulging 1800s, the inflammable region proliferates to the kitchen outside, existed in the living room.

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备注/Memo

备注/Memo:
收稿日期:2011-03-07
更新日期/Last Update: