开敞空间氢气爆炸特性数值模拟研究
Numerical simulation study on hydrogen explosion characteristics in open spaces
关文玲 1李莫凡 1董呈杰 1任常兴2
作者信息
- 1. 天津理工大学 环境科学与安全工程学院,天津 300384
- 2. 应急管理部天津消防研究所,天津 300381;工业与公共建筑火灾防控技术应急管理部重点实验室,天津 300381;天津市消防安全技术重点实验室,天津 300381
- 折叠
摘要
为研究开敞空间氢气爆炸危害,基于Fluent流体力学计算软件建立开敞氢气-空气爆炸的三维数值模型,在此基础上,模拟和分析了边长为0.5、1.0、2.0、3.0 m的立方体预混氢气-空气爆炸,并将数值模拟结果与TNO多能法和BST法的爆炸强度等级进行对比.结果表明,火焰传播距离约为初始氢气半径的2倍.爆炸最大压力出现位置的无量纲距离与气云初始半径近似成线性关系.TNO多能法和BST法爆炸强度等级的选择应根据气云初始尺寸的增大而增加.
Abstract
In order to study the hazards of open hydrogen explo-sion,a three-dimensional numerical model of open hydrogen-air explosion was established based on Fluent fluid dynamics calcula-tion software.On this basis,cubic premixed hydrogen-air explo-sion with side lengths of 0.5,1.0,2.0 m and 3.0 m was simulated and analyzed,and the numerical simulation results were com-pared with the explosion intensity grades of TNO multi-energy method and BST method.The results show that the flame propa-gation distance is about 2 times of the initial hydrogen radius.The dimensionless distance of the location of the maximum explosion pressure is approximately linear with the initial radius of the gas cloud.The choice of explosion intensity grade of TNO multi-energy method and BST method should increase with the increase of initial size of gas cloud.
关键词
氢气爆炸/开敞空间/气云尺寸/最大超压/火焰传播/TNO多能法/BST法Key words
hydrogen explosion/open space/gas cloud size/maxi-mum overpressure/flame propagation/TNO multi-energy method/BST method引用本文复制引用
出版年
2024
NETL
NSTL
万方数据