Experimental study of fuel-air mixture explosion characteristics in the short pipe containing weakly confined face at the end

DU Yang; WANG Shimao; YUAN Guangqiang; QI Sheng; WANG Bo; LI Guoqing; LI Yangchao

doi:10.11883/bzycj-2015-0242

Volume 38 Issue 2

Jan. 2018

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Article Navigation > Explosion And Shock Waves > 2018 > 38(2): 465-472

DU Yang, WANG Shimao, YUAN Guangqiang, QI Sheng, WANG Bo, LI Guoqing, LI Yangchao. Experimental study of fuel-air mixture explosion characteristics in the short pipe containing weakly confined face at the end[J]. Explosion And Shock Waves, 2018, 38(2): 465-472. doi: 10.11883/bzycj-2015-0242

Citation:

DU Yang, WANG Shimao, YUAN Guangqiang, QI Sheng, WANG Bo, LI Guoqing, LI Yangchao. Experimental study of fuel-air mixture explosion characteristics in the short pipe containing weakly confined face at the end[J]. Explosion And Shock Waves, 2018, 38(2): 465-472. doi: 10.11883/bzycj-2015-0242

Citation:

DU Yang, WANG Shimao, YUAN Guangqiang, QI Sheng, WANG Bo, LI Guoqing, LI Yangchao. Experimental study of fuel-air mixture explosion characteristics in the short pipe containing weakly confined face at the end[J]. Explosion And Shock Waves, 2018, 38(2): 465-472. doi: 10.11883/bzycj-2015-0242

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Experimental study of fuel-air mixture explosion characteristics in the short pipe containing weakly confined face at the end

doi: 10.11883/bzycj-2015-0242

Department of Petroleum Supply Engineering, Logistic Engineering University of PLA, Chongqing 401311, China

Received Date: 2015-12-25
Rev Recd Date: 2016-10-03
Publish Date: 2018-03-25

Abstract

Abstract

In this paper, we studied the characteristics of the fuel-air mixture explosion using an experiment system built in a short pipe containing a weakly confined face at the end, with the following results achieved. (1) Multiple pressure peaks were observed due to the rupture, discharge, external explosion, accompanied with the Helmholtz oscillation. (2) The constraint surface produced a strengthening effect on the explosion overpressure, the maximum internal overpressure being 24.23 kPa and the maximum external overpressure being 5.45 kPa, respectively 4.9 and 2.7 times that of the pressure as compared in an unconstrained structure. (3) The morphological changes of the flame can be divided into four stages, those of the laminar combustion, the mutation and acceleration, the external explosion, and the extinction. Due to the influence of such factors as turbulence, interface instability and baroclinic effects, the flame shape was folded and crimped, forming a tulip during the mutation and acceleration stage and a sphere during the external explosion stage. (4) During the laminar combustion stage, the weakly confined face had a lessening effect on the flame speed, with 3.5 m/s as its maximum, which is reduced by 41.3%. In the states of mutation-acceleration and external explosion, the destruction of the confined surface had a strengthening effect on the flame speed, with 80.2 m/s as its maximum, which is enhanced by 106.2%. (5) The flame development made a significant difference at different concentrations. The flame can break through the weak confinement and form an external explosion at low and medium concentration, while at high concentration, the flame was unable to do so.
- fuel-gas mixture,
- short pipe,
- weakly confined film,
- overpressure,
- flame propagation speed

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References(16)

References

[1]	王引群.矿井瓦斯爆炸火焰传播试验研究[J].山西煤炭, 2012(9):52-53. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=sxmt201209019&dbname=CJFD&dbcode=CJFQ WANG Yinqun. Experimental study on flame propagation of gas explosion in mines[J]. Shanxi Coal, 2012(9):52-53. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=sxmt201209019&dbname=CJFD&dbcode=CJFQ
[2]	温小萍, 武建军, 解茂昭.瓦斯爆炸火焰结构与压力波的耦合规律[J].化工学报, 2013(10):3871-3877. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hgsz201310057&dbname=CJFD&dbcode=CJFQ WEN Xiaoping, WU Jianjun, XIE Maozhao. Coupled relationship between flame structure and pressure wave of gas explosion[J]. CIESC Journal, 2013(10):3871-3877. http://kns.cnki.net/KCMS/detail/detail.aspx?filename=hgsz201310057&dbname=CJFD&dbcode=CJFQ
[3]	CAO W, Gao W, LIANG J, et al. Flame-propagation behavior and a dynamic model for the thermal-radiation effects in coal-dust explosions[J]. Journal of Loss Prevention in the Process Industries, 2014, 29(1):65-71. http://www.sciencedirect.com/science/article/pii/S0950423014000254
[4]	KIM W K, MOGI T, DOBASHI R. Flame acceleration in unconfined hydrogen/air deflagrations using infrared photography[J]. Journal of Loss Prevention in the Process Industries, 2013, 26(6):1501-1505. doi: 10.1016/j.jlp.2013.09.009
[5]	NISHIMURA I, MOGI T, DOBASHI R. Simple method for predicting pressure behavior during gas explosions in confined spaces considering flame instabilities[J]. Journal of Loss Prevention in the Process Industries, 2013, 26(2):351-354. doi: 10.1016/j.jlp.2011.08.009
[6]	SNOEYS J, GOING J E, TAVEAU J M R. Advances in dust explosion protection techniques: flameless venting[J]. Procedia Engineering, 2012, 45(3):403-413. http://www.sciencedirect.com/science/article/pii/S1877705812031906
[7]	YAN X, YU J, GAO W. Flame behaviors and pressure characteristics of vented dust explosions at elevated static activation overpressures[J]. Journal of Loss Prevention in the Process Industries, 2015, 33:101-108. http://www.sciencedirect.com/science/article/pii/S0950423014002058
[8]	TOMLIN G, JOHNSON D M, CRONIN P, et al. The effect of vent size and congestion in large-scale vented natural gas/air explosions[J]. Journal of Loss Prevention in the Process Industries, 2015, 35:169-181. doi: 10.1016/j.jlp.2015.04.014
[9]	MOLKOV V, MAKAROV D. LES modelling of an unconfined large-scale hydrogen-air deflagration[J]. Journal of Physics D: Applied Physics, 2006, 39(18):4366-4376. https://www.mendeley.com/research-papers/les-modelling-unconfined-largescale-hydrogenair-deflagration/
[10]	QIAO A, ZHANG S. Advanced CFD modeling on vapor dispersion and vapor cloud explosion[J]. Journal of Loss Prevention in the Process Industries, 2010, 23(6):843-848. doi: 10.1016/j.jlp.2010.06.006
[11]	DADASHZADEH M, KHAN F, HAWBOLDT K, et al. An integrated approach for fire and explosion consequence modelling[J]. Fire Safety Journal, 2013, 61(5):324-337. http://www.sciencedirect.com/science/article/pii/S0379711213001586
[12]	TOMIZUKA T, KUWANA K, SHIMIZU K, et al. Estimation of turbulent flame speed during DME/air premixed gaseous explosions[J]. Journal of Loss Prevention in the Process Industries, 2013, 26(2):369-373. doi: 10.1016/j.jlp.2011.09.004
[13]	齐圣. 受限空间油气爆燃及其细水雾抑制实验研究与数值仿真[D]. 重庆: 解放军后勤工程学院, 2014.
[14]	FAKANDU B M, ANDREWS G E, PHYLAKTOU H N. Vent burst pressure effects on vented gas explosion reduced pressure[J]. Journal of Loss Prevention in the Process Industries, 2015, 36: 429-438. doi: 10.1016/j.jlp.2015.02.005
[15]	CHAO J, BAUWENS C R, DOROFEEV S B. An analysis of peak overpressures in vented gaseous explosions[J]. Proceedings of the Combustion Institute, 2011, 33(2):2367-2374. doi: 10.1016/j.proci.2010.06.144
[16]	姜孝海. 泄爆外流场的动力学机理研究[D]. 南京: 南京理工大学, 2004. http://cdmd.cnki.com.cn/Article/CDMD-10288-2005031547.htm

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