文献类型：期刊文献

英文题名：Pressure dependence of combustion instability for premixed syngas/air in a closed channel

作者：Shen, Xiaobo[1,2];Dou, Zengguo[1,3];Zhang, Zhenwu[1,2];Cong, Beihua[4];Liu, Haifeng[1,3];Wang, Fuchen[1,3]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[3]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[4]Tongji Univ, Shanghai Inst Disaster Prevent & Relief, Shanghai, Peoples R China

年份：2022

卷号：47

期号：83

起止页码：35171

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20224112857910);WOS:【SCI-EXPANDED(收录号:WOS:000884348100005)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 22078095 and 51604121) and the Shanghai Science and Technology Committee (Grant No. 20dz1200903 and 21QC1400400). The authors sincerely thank these supports.

语种：英文

外文关键词：Syngas; Combustion; Oscillation; Instability; Flame-acoustic interaction

摘要：Syngas is a promising alternative energy carrier with low carbon and pollutants emissions, which has huge application potential in internal combustion engines and gas turbines. The combustion characteristics of stoichiometric syngas/air mixtures with varied initial pressure (0.5-2.5 atm) and hydrogen content (10%-90% v/v) were examined through experiments in a rectangular closed channel. The flame images and overpressure dynamics were captured by high-speed schlieren photography and pressure sensors. The flame instabilities and the flame-acoustic wave interaction were explored. The results showed that the flame morphology and dynamics were enhanced with increasing hydrogen content and initial pressure. The Darrius-Landau instability has an impact on flame deformation, which was strengthened with growing initial pressure, while the thermo-diffusive instability could be neglected during combustion. At later stages after tulip inversion, the flame-acoustic wave interaction was relatively outstanding inducing wrinkled flame front and cellular structures on the flame surface. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.