Size effect of methane-air mixture explosion in closed vessel

doi:10.16265/j.cnki.issn 1003-3033.2021.01.009

Abstract

Abstract: In order to explore size effect and change laws of methane explosions in closed vessel, and to better prevent and control such accidents, explosion pressure characteristics of methane-air mixture in a closed vessel were studied by changing length and diameter of cylindrical container and pipes. Then, a multiple linear regression model was used to analyze relationship between maximum explosion pressure and its rise rate with pipe diameter and length. The results show that in a cylindrical vessel, maximum explosion pressure rise rate decreases along with increase of vessel volume, and both it and its rise rate at end of pipes will decrease as inner diameter of pipes increases, but will increase as pipe length increases. A dimensionless predictive model of maximum explosion pressure and maximum pressure rise rate is obtained through experiment.

Key words: closed vessel, methane-air mixture explosion, size effect, container volume, maximum explosion pressure

CLC Number:

X932

WANG Zhirong, SUN Peipei, TANG Zhenhua, ZHANG Kai. Size effect of methane-air mixture explosion in closed vessel[J]. China Safety Science Journal, 2021, 31(1): 60-66.

References

[1] SINGH J.Gas explosions in single and compartmented vessels[D]. London:University of London, 1978.
[2] 霍然,杨振宏,柳静献.火灾爆炸预防控制工程学[M].北京:机械工业出版社,2007: 71-90.
[3] 王志荣,蒋军成,周超.连通装置气体爆炸特性[J].爆炸与冲击,2011, 31(1): 69-74.
WANG Zhirong, JIANG Juncheng, ZHOU Chao. Experimental investigation of gas explosion characteristic in linked vessels [J].Explosion and Shock Waves,2011,31(1): 69-74.
[4] 赵衡阳.气体和粉尘爆炸原理[M].北京:北京理工大学出版社,1996: 92-95.
[5] 邓贵德,郑津洋,陈勇军.离散多层爆炸容器的抗爆性能和尺寸效应[J].爆炸与冲击,2010,30(2): 215-219.
DENG Guide,ZHENG Jinyang,CHEN Yongjun. Anti-explosion capability and scale effect of discrete multi-layered explosion containment vessels [J]. Explosion and Shock Waves,2010,30(2): 215-219.
[6] BARTKNECHT W.Dust explosions course, prevention, protection [M].Berlin:Springer, 1981:97-100.
[7] 王淑兰,丁信伟,贺匡国.液化石油气燃爆特性的实验研究[J]. 石油化工设备, 1991,20(5): 41-43.
[8] 徐景德,周心权,吴兵.矿井瓦斯爆炸传播的尺寸效应研究[J]. 中国安全科学学报, 2001, 11(6): 36-40.
XU Jingde,ZHOU Xinquan,WU Bing. Study on the size effect in the propagation of gas explosion in mine pit [J]. China Safety Science Journal, 2001, 11(6): 36-40.
[9] 许航,秦涧,张一博.变直径管内甲烷爆炸压力的测定[J].测试技术学报, 2013, 27(1): 25-28.
XU Hang, QING Jian, ZHANG Yibo. Measurement of methane explosion pressure in variable diameter tube[J].Journal of Test and Measurement Technology,2013,27(1): 25-28.
[10] 连赟猛,方道红,顾晓辉,等.典型密闭装置内爆炸尺寸效应研究[J]. 爆破器材, 2012, 41(5): 1-4.
LIAN Yunmeng,FANG Daohong,GU Xiaohui,et al.Effect of scales on typical closed structure due to internal explosion [J]. Explosive Materials, 2012, 41(5): 1-4.
[11] 刘明翰,王志荣,甄亚亚,等.球接管容器气体爆炸尺寸效应的试验研究与数值分析[J].安全与环境学报,2017, 17(4): 1 334-1 338.
LIU Minghan,WANG Zhirong,ZHEN Yaya,et al.Experimental study and a numerical analysis of the effects of vessel size on the gas explosion in a spherical one connected to the pipes [J].Journal of Safety and Environment,2017,17(4): 1 334-1 338.
[12] ZHANG Kai,WANG Zhirong,YAN Chen,et al.Effect of size on methane-air mixture explosions and explosion suppression in spherical vessels connected with pipes[J].Journal of Loss Prevention in the Process Industries,2017,49(2) 785-790.
[13] 屈姣,邓军,王秋红.密闭球形空间内超细铝粉爆炸特性研究[J].中国安全科学学报, 2019,29(7): 51-57.
QU Jiao,DENG Jun,WANG Qiuhong.Study on explosion characteristics of ultrafine aluminum powder in a closed spherical space [J]. China Safety Science Journal, 2019,29(7): 51-57.
[14] 蔡运雄,杜扬,王世茂,等.封闭管道油气爆炸超压及火焰传播特性[J].中国安全生产科学技术,2019,15(6): 61-66.
CAI Yunxiong,DU Yang,WANG Shimao, et al.Overpressure and flame propagation characteristics of gasoline-air mixture explosion in closed tube[J].Journal of Safety Science and Technology,2019,15(6): 61-66.
[15] 李重情,穆朝民,许登科,等.空腔长度对瓦斯爆炸冲击波传播影响研究[J].采矿与安全工程学报,2018,35(6): 1 293-1 300.
LI Zhongqing,MU Chaomin,XU Dengke,et al.Influence of cavity length on shock wave propagation of gas explosion [J].Journal of Mining and Safety Engineering,2018,35(6): 1 293-1 300.
[16] 时本军,穆朝民,周辉,等.空腔体积比对甲烷爆炸冲击波传播机制的影响[J].中国安全科学学报,2020,30(3): 87-93.
SHI Benjun,MU Chaomin,ZHOU Hui, et al.Influence of cavity volume ratio on propagation of methane blast wave[J].China Safety Science Journal,2020,30(3): 87-93.
[17] 蒋新生,魏树旺,徐建楠,等.分支管道长度对油气爆炸强度影响试验研究[J].中国安全科学学报,2017,27(2): 53-57.
JIANG Xinsheng, WEI Shuwang, XU Jiannan, et al.Experimental study on effect of length of branch on intensity of gasoline-air mixture explosion in pipeline [J].China Safety Science Journal,2017,27(2): 53-57.
[18] 刘谦,林柏泉,朱传杰,等.管道长度对爆炸波前流速与超压耦合关系影响研究[J].采矿与安全工程学报, 2014, 31(3): 476-482.
LIU Qian,LIN Baiquan,ZHU Chuanjie, et al.Influence of pipe length on coupled relation between flow velocity of detonation front and overpressure[J].Journal of Mining and Safety Engineering,2014,31(3): 476-482.
[19] 祝钊.管道瓦斯爆炸流场及其影响因素数值模拟研究[J].中国矿业大学学报,2017,46(2): 300-305.
ZHU Zhao.Numerical simulation of gas explosion flow field characteristics and influencing factors in pipelines[J].Journal of China University of Mining & Technology,2017,46(2): 300-305.
[20] 范敏.单圆柱风荷载的雷诺数效应研究[D].成都:西南交通大学,2014.
FAN Min.Research on Reynolds number effect on single-cylindrical on wind load [D].Chengdu:Southwest Jiaotong University,2014.
[21] ZHU Chuanjie,LIN Baiquan,JIANG Bingyou,et al.Numerical simulation of blast wave oscillation effects on a premixed methane/air explosion in closed-end ducts[J].Journal of Loss Prevention in the Process Industries, 2013, 26(4): 851-861.