文献类型：期刊文献

英文题名：Experimental study on hydrogen/air premixed flame propagation in closed rectangular channels

作者：Shen, Xiaobo[1]; Zhang, Chao[1]; Wen, Jennifer[2]; Xiu, Guangli[1]

机构：[1] School of Resources and Environmental Engineering, East China University of Science and Technology, Meilong Road, Shanghai, 200237, China; [2] Warwick FIRE, School of Engineering, University of Warwick Coventry, CV4 7AL, United Kingdom

年份：2019

外文期刊名：12th Asia-Pacific Conference on Combustion, ASPACC 2019

收录：EI(收录号：20193407342001)

语种：英文

外文关键词：Combustion - Hydrogen

摘要：An experimental study of hydrogen/air premixed flame propagating in closed rectangular channels was conducted to investigate the evolution of the flame during its propagation. The schlieren system and the pressure sensor were used to capture flame shapes and pressure changes in the channels. It was found that the different aspect ratios resulted in distinct flame shape evolutions and dynamics. Larger acceleration rate and more drastic fluctuations of both flame tip velocity and pressure were recorded in the channel with larger aspect ratio. Some interesting flame shapes such as the "T-shaped flame", the second flat flame and the second tulip flame were found in the channel with larger aspect ratio. Comparing the experimental data with analytical theory showed the data of channel with larger width coincided better with the analytical theory. The results also suggested that the pressure wave is not the major cause of tulip flame formation, but an important influencing factor of the subsequent flame shape evolution after the inversion. Instead, the flame deceleration after flame touching the wall was regarded as the primary cause. ? Asia-Pacific Conference on Combustion, ASPACC 2019.All right reserved.