Investigation of Solid Structure Obstacles Influence on Premized Methane Flame Propagation
In fire fighting safety design, it needs to consider the factors which may lead to slow combustion transformation to detonation when there have flammable gas in the surrounding environment. Applying self-designed experimental system for flame acceleration, three kinds of solid structure obstacles effect on flame speed and overpressure were investigated. Cuboids, quadruple prisms and cylinders were chosen with blockage ratios 40％. Results demonstrate obstacles in the tube deter flame propagation at the initial stage and accelerate flame propagation after flame has come across obstacles. The maximal flame speed and peak overpressure with obstacles are larger than without obstacles in the tube. The maximal flame speed and peak overpressre at first increase and then decrease with the augment of ignition distance. Flame speed and overpressure are influenced the most by putting obstacles at the place of about L/S=6.Ignition distance effect on flame speed is much larger than overpressure. The results are expected to have some help in preventing and controlling flammable gas explosive and providing reference for industry safety design.
fire fighting solid structure obstacles ignition distance flame speed overpressure
DING Yibin SUN Jinhua GUO Ziru WANG Quan
State Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230027,Chin School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232001,China
国际会议
2009 International Symposium on Fire Science and Fire-Protection Engineering(2009火灾科学与消防工程国际学术会议)
北京
英文
139-145
2009-10-17（万方平台首次上网日期，不代表论文的发表时间）