Study of Influence of Solid Obstacle on Premixed CH4-Air Flame Propagation in Rectangular Tube
To better understand the mechanism of gas explosion in coal mine, many researchers established experimental tubes mainly fixed with plane obstacles. In the article four forms of solid obstacles were introduced to study the characteristics of the premixed CH4-Air flame propagation. A full transparent tube used in the study was 1.5m long with rectangular cross section. Several photoelectric sensors and piezoelectric sensors were fixed upon the tube to achieve the light and pressure signals at the testing points. And the images of flame propagation can be photographed by a high-speed video camera. The obstacles used in experiment have the shapes of plates, triple prisms, cuboids and cylinders. And each form has the blockage ratios of 20%, 40% and 60%. It was found that obstacles of plates or triple prisms increased flame velocity and overpressure much larger, and cuboids were intermediate, while effects of cylinders were comparatively limited. It also revealed that the obstacles can remarkably accelerated the flame velocity and pressure, and the irregularities of their surface were the main factor resulting in the flame turbulence. There was a small difference in the early stage of flame growing ahead of obstacles, and the flame velocity and overpressure were increased obviously when the flame spanned the obstacles. The results and analyses in this article can be regarded as a reference for preventing and controlling fire damp explosion disaster in mine or other combustible gases explosion hazard in pipelines.
WANG Quan SHEN Zhaowu GUO Ziru LI Zhimin
School of Engineering Science, University of Science and Technology of China, Hefei 230026, China Sc School of Engineering Science, University of Science and Technology of China, Hefei 230026, China School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, Anhui, C Department of Mechanics, Anhui University of Science and Technology, Huainan 232001, Anhui, China
国际会议
2011 International Autumn Seminar on Propellants,Explosives and Pyrotechnics(2011国际推进剂、炸药、烟火技术秋季研讨会)
南京
英文
584-587
2011-09-20（万方平台首次上网日期，不代表论文的发表时间）