Effect of initial turbulence on explosion behavior of stoichiometric methane-ethylene-air mixtures in confined space

被引：36
作者：
Wang, Kai [1 ,3 ]
Su, Mingqing [1 ,2 ,3 ]
Wei, Lijun [1 ,2 ,4 ]
Chen, Sining [1 ,2 ,4 ]
Kong, Xiangbei [2 ,4 ]
Fang, Yunlong [2 ,4 ]
机构：
[1] China Univ Min & Technol Beijing, Sch Emergency Management & Safety Engn, Beijing 100083, Peoples R China
[2] China Acad Safety Sci & Technol, Beijing 100012, Peoples R China
[3] China Univ Min & Technol Beijing, Beijing Key Lab Precise Min Intergrown Energy & R, Beijing 100083, Peoples R China
[4] Minist Emergency Management China, Key Lab Major Hazard & Chem Ind Pk Syst Safety, Beijing 100012, Peoples R China
来源：
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION | 2022年 / 161卷
基金：
中国国家自然科学基金;
关键词：
Methane; ethylene; Explosion characteristic; Combustion time; Heat loss; Turbulence influence; FLAME ACCELERATION; DETONATION LIMITS; RISK-ASSESSMENT; FUEL-BLENDS; IGNITION; COMBUSTION; DEFLAGRATIONS; PROPAGATION; SIMULATION; PRESSURES;
D O I：
10.1016/j.psep.2022.03.072
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The turbulent explosion process of stoichiometric CH4/C2H4/air mixtures was experimentally studied by using a standard 20 L sphere explosion system and it's powder storage tank as the turbulence generator. Taking the initial turbulent environment and ethylene volume fraction as variables, the effects of turbulence intensity and fuel composition on explosion characteristics were studied. The results show that both turbulence intensity and ethylene content promote the explosion of the mixtures and increase the severity of the explosion, but the influence of turbulence intensity on combustion evolution mainly focuses on heat loss, while the influence of ethylene content mainly focuses on adiabatic explosion. When the ethylene ratios increase to 0.5 or more, the increase of explosion severity caused by turbulence is not obvious. The analysis of experimental results and numerical simulation shows that the influence of initial turbulence generated by powder storage tank on explosion is the result of the combined action of turbulent kinetic energy and combustible gas redistribution. (c) 2022 Published by Elsevier Ltd on behalf of Institution of Chemical Engineers.
引用
收藏
页码：583 / 593
页数：11
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