[1]王国磊,田贯三,张增刚,等.燃气泄漏扩散过程的模拟研究[J].山东建筑大学学报,2010,(06):576-580.
 WANG Guo-lei,TIAN Guan-san,ZHANG Zeng-gang,et al.Simulation research on the leakage and diffusion process of indoor combustible gas[J].Journal of Shandong jianzhu university,2010,(06):576-580.
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燃气泄漏扩散过程的模拟研究
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《山东建筑大学学报》[ISSN:1673-7644/CN:37-1449/TU]

卷:
期数:
2010年06期
页码:
576-580
栏目:
研究论文
出版日期:
2010-12-15

文章信息/Info

Title:
Simulation research on the leakage and diffusion process of indoor combustible gas
作者:
王国磊田贯三张增刚贾文磊
山东建筑大学  热能工程学院,山东 济南 250101
Author(s):
WANG Guo-lei TIAN Guan-san ZHANG Zeng-gang et al.
School of Thermal Energy Engineering, Shandong Jianzhu University, Jinan 250101, China
关键词:
燃气泄漏扩散数值模拟爆炸危险区域
Keywords:
combustible gas leakage and diffusion numerical simulation explosive dangerous areas
分类号:
TU996
文献标志码:
A
摘要:
室内可燃气体泄漏后与空气形成混合气体,容易引发爆燃或爆炸等危险事故,考虑到居民常使用燃气种类有天然气和液化石油气,本文采用雷诺平均的N-S方程, 湍流模型以及组分输运模型方程,利用CFD技术对二者在有限空间内的泄漏扩散过程进行模拟研究,并与实验结果相比较,对比分析二者在不同泄漏工况下的泄漏扩散规律,结果表明:在泄漏的初始时刻,天然气和液化石油气形成的爆炸危险区域分别在房间上部和下部;液化石油气泄漏后很快就会在整个房间形成爆炸危险区域;通风口加速了泄漏天然气的排放,但房间内始终会存在一定厚度的爆炸危险区域。两种可燃气体在泄漏后形成的爆炸危险区域的分布差异,可为制定室内可燃气体危险事故的预防措施提供参考。
Abstract:
The leakage of indoor combustible gas is mixed with indoor air and easily leads to detonation or explosion or other dangerous accidents. For the reason that natural gas and liquefied petroleum gas are usually used by inhabitants, the Reynolds averaged Navier-Stokes equation, the turbulence model equation, the species transport equation and computational fluid dynamics technologies are used to numerically simulate the leakage and diffusion process of natural gas and liquefied petroleum gas. Simulated results are compared with experimental results and the regularities of the leakage and diffusion in different conditions are analyzed. The results show that at the initial stage of leakage, the explosive dangerous areas of NG and LPG locate at top and bottom. In a very short time, the LPG’s concentration in room forms an explosive dangerous area. The NG’s concentration reduces faster with the function of ventilation opening, but there is always an explosive dangerous area of a certain thickness. Distribution differences of explosive dangerous areas can provide reference for preventing dangerous accidents caused by indoor combustible gas.

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[2]薛海强,张增刚,田贯三,等.可燃气体泄漏扩散影响因素的数值分析[J].山东建筑大学学报,2009,(06):558.
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更新日期/Last Update: 2011-02-22