The secondary explosion phenomenon of gasoline-air mixture in a confined tunnel

International Symposium on Resource Exploration and Environmental Science

地球科学;生态环境科学

Zhang, Peili^1 ; Li, Jianxiang^2 ; Guo, Yanbo^2 ; Du, Yang^1

Department of Petroleum Supply Engineering, Logistical Engineering University, Chongqing, China^1

Unit 72617 of Shenyang Joint Logistics Support Center, Wuhan Logistics Support Base, Shandong, China^2

关键词: Air mixtures;    Critical concentration;    Experimental evidence;    Gasoline vapours;    Oxygen concentrations;    Secondary explosion;    Solid heating;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/64/1/012008/pdf
DOI  :  10.1088/1755-1315/64/1/012008

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this article, experimental evidences of the special phenomenon of the secondary explosion of gasoline-air mixture were presented in the first place, and then, the causes for the secondary explosion were discussed. At last, effects of concentration on the secondary explosion were studied in detail through multiple experiments carried out in a cylinder tunnel with a solid heating device. Based on the experimental results analysis, the critical concentration for the secondary explosion of the gasoline-air mixture in the confined tunnel were discussed. Results indicated that main causes for the secondary explosion could be summarized as 4 points. Whether the secondary explosion occurred or not was determined by critical gasoline vapour and oxygen concentration even if the temperature was maintained in a reasonable scope. When the concentration of the gasoline vapour was as low as 0.45% and the oxygen as low as 10.4%, the secondary explosion still could be triggered.