Experimental study on the characteristics of fuel-air mixture explosion outside the confined space including weak constraint face
Wang Shimao1，Du Yang1, Li Guoqing1,Qi Sheng1, Li Yangchao1,Xu Changhang2
1.Department of Petroleum Supply Engineering , Logistical Engineering University ,Chongqing, 401311
2.College of mechanical and electrical engineering , China University of Petroleum (Hua Dong),Shandong,Qingdao, 266580
The experiment system of the confined space with weak constraint face is established, and the characteristics of fuel-air mixture explosion outside the space is studied through the experiment. The relationship curves of explosion overpressure and time on different locations outside the vessel were obtained, and the flame development process was caught. The result shows that:1. The characteristics of the extern overpressure is “brust&fv overpressure→maximum negative pressure→external explosion overpressure→secondary negative overpressure”, and overpressure values along the vertical direction are higher than the overpressure values along the horizontal direction. 2. With the increase of oil gas concentration, the explosion overpressure increases first and then decreases, and the maximum value of the explosion overpressure is obtained at the initial oil concentration of 1.79%. 3. The external explosion overpressure has a negative exponential law with the increase of proportional distance. 4. The morphological change process of flame can be divided into "pilot injection stage→ crimping and deforming stage→mushroom shaped stage→extinction stage". The maximum flame height is 0.85m and the maximum diameter is 0.6m.
王世茂1，杜扬 1，李国庆1，齐圣1，李阳超1，徐长航2. 含弱约束受限空间油气爆炸外部特性研究[J]. 振动与冲击, 2017, 36(15): 253-258.
Wang Shimao1，Du Yang1, Li Guoqing1,Qi Sheng1, Li Yangchao1,Xu Changhang2. Experimental study on the characteristics of fuel-air mixture explosion outside the confined space including weak constraint face. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(15): 253-258.
[1] 欧益宏, 杜扬, 蒋新生, 等. 热源条件下油气二次热着火实验[J]. 爆炸与冲击, 2011,31(5):510-515.
Ou Yihong,Du Yang,Jiang Xinsheng,et al. Secondary thermal ignition of gasoline-air mixture induced by hot source[J].Explosion and Shock Waves,2011,31(5):510-515.
[2] Movileanu C, Gosa V, Razus D. Explosion of gaseous ethylene–air mixtures in closed cylindrical vessels with central ignition[J]. Journal of Hazardous Materials, 2012,235–236(0):108-115.
[3] Cui Y, Wang Z, Jiang J, et al. Size Effect on Explosion Intensity of Methane-air Mixture in Spherical Vessels and Pipes[J]. Procedia Engineering, 2012,45(0):483-488.
[4] Tang C, Zhang S, Si Z, et al. High methane natural gas/air explosion characteristics in confined vessel[J]. Journal of Hazardous Materials, 2014,278(0):520-528.
[5] 杨书召, 景国勋. 受限空间瓦斯爆炸火焰与毒气传播研究[J]. 河南理工大学学报（自然科学版）, 2014,33(3):257-260, 275.
Yang Shuzhao,Jing Guoxun.Study on spread of flame and noxious gas of gas explosion in confined spaces[J].Journal of Henan Polytechnic University(Natural Science).2014,33(3):257-260,275.
[6] 程浩力, 李睿, 刘德俊. 管道燃气爆炸特性实验研究[J]. 中国安全生产科学技术, 2010,06(4):23-27.
Cheng Haoli,Li Rui,Liu Dejun.Experimental study on the explosion characteristic of combustible gas in pipelines[J].Journal of Safety Science and Technology,2010,06(4):23-27.
[7] Zhang Q, Pang L, Liang H M. Effect of scale on the explosion of methane in air and its shockwave[J]. Journal of Loss Prevention in the Process Industries, 2011,24(1):43-48.
[8] Emami S D, Rajabi M, Che Hassan C R, et al. Experimental study on premixed hydrogen/air and hydrogen–methane/air mixtures explosion in 90 degree bend pipeline[J]. International Journal of Hydrogen Energy, 2013,38(32):14115-14120.
[9] Na Inna A M, Phylaktou H N, Andrews G E. Effects of Obstacle Separation Distance on Gas Explosions: The Influence of Obstacle Blockage Ratio[J]. Procedia Engineering, 2014,84(0):306-319.
[10] 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(3):476-482.
Li Qian,Lin Boquan,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(3):476-482.
[11] Zhao Z, Zhenyuan J, Haizhu L. Characteristics of gas explosion flow fields in complex pipelines[J]. International Journal of Mining Science and Technology, 2015,25(1):157-164.
[12] 姜孝海. 泄爆外流场的动力学机理研究[D]. 南京理工大学工程力学系, 2004.
[13] Kasmani R M, Andrews G E, Phylaktou H N. Experimental study on vented gas explosion in a cylindrical vessel with a vent duct[J]. Process Safety and Environmental Protection, 2013,91(4):245-252.
[14] 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(0):169-181.
[15] Lee H G, Kim J. Numerical simulation of the three-dimensional Rayleigh–Taylor instability[J]. Computers &
Mathematics with Applications, 2013,66(8):1466-1474.
