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《Journal of Safety Science and Technology》 2017-10
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Effects of gasoline-air concentration on explosion overpressure characteristics and flame behavior of semi-open pipeline

LI Meng;DU Yang;LI Guoqing;QI Sheng;WANG Shimao;WEI Shihao;Department of Petroleum Supply Engineering,Logistical Engineering University;  
In order to investigate the effect of gasoline-air concentration on the explosion overpressure characteristics and flame behavior of semi-open pipeline,a semi-open transparent pipeline experimental platform was established,and a series of comparative experiments on the gasoline-air explosion were carried out by using five different initial gasoline-air concentrations. The results showed that the gasoline-air vapor concentration had a significant effect on the peak value of overpressure and the rate of pressure rise of the gasoline-air explosion,and both of them showed the change law of increasing first and then decreasing with the increase of the gasoline-air concentration. The gasoline-air vapor concentrations had a significant effect on the propagation speed of flame front,and the propagation speed of flame front was the greatest and the propagation distance of flame front was the longest under the equivalent concentration ratio. The flame behavior in the pipeline could be divided into four stages. The gasoline-air vapor concentrations had a significant effect on the flame propagation morphology and propagation speed. The effect on the flame propagation morphology was mainly reflected in the damage deformation and explosion outside the pipeline stages. The explosion radius increased first and then decreased with the increase of concentration,as well as the flame propagation speed.
【Fund】: 国家自然科学基金项目(51276195)
【CateGory Index】: TE88
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