文献类型：期刊文献

英文题名：Numerical investigation on dynamic behavior of premixed hydrogen/air flame propagation in a closed tube

作者：Shen, Xiaobo[1,2];Shen, Jiayu[1];Liu, Haifeng[3];Wen, Jennifer X.[4];Ma, Yunsheng[5];Zou, Xiong[5];Liu, Zhenxue[5]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[4]Univ Surrey, Ctr Energy Resilience, Sch Mech Engn Sci, Guildford, England;[5]Shandong Chambroad Holding Grp Co Ltd, Binzhou 256500, Shandong, Peoples R China

年份：2023

卷号：354

外文期刊名：FUEL

收录：;EI(收录号：20233114474929);WOS:【SCI-EXPANDED(收录号:WOS:001051331900001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 22278135 and 22078095) and the Shanghai Science and Technology Committee (Grant No. 20dz1200903 and 21QC1400400) . This work was also supported by the Individual Fellowship Scheme of the European Union's Horizon 2020 Marie Sklo-dowska-Curie Actions (Grant No. 891173, HYGAS) . The authors sincerely thank these supports.

语种：英文

外文关键词：Hydrogen; air; Premixed flame; LES; Pressure wave; Vortex; Reverse flow

摘要：In this paper, the large eddy simulation (LES) model of OpenFOAM was used to study the flame propagation characteristics of hydrogen-air premixed flame in a closed tube with an aspect ratio of 12. The numerical simulation reproduces the characteristic flame shape evolution observed in the experiment, such as classical tulip flame, T-shaped flame, and distorted tulip deformation. The predicted flame front velocity, overpressure, and its fluctuation are all in good agreement with the measurements. The simulation demonstrates that after the classic tulip flame is formed, a series of waves cause an obvious adverse pressure gradient at the front of the flame. This adverse pressure gradient drives reverse flow which pulls the backward tip further into the combustion zone, forming an elongated tulip flame. A small amount of unburnt gas trapped in the cusp rapidly consumes to form a featured T-shaped flame. Then the T-shaped flame transforms into the second finger-shaped flame, and finally the tulip distortion occurs. The vortex and the reverse flow near the flame front generated by the interaction between the pressure field and the flow field accounts primarily for the formation of distorted tulip flame.