文献类型：期刊文献

英文题名：Strong flame acceleration and detonation limit of hydrogen-oxygen mixture at cryogenic temperature

作者：Shen, Xiaobo[1,2];Fu, Wenju[1];Liang, Wenkai[3];Wen, Jennifer X.[2];Liu, Haifeng[4];Law, Chung K.[3,5]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Univ Warwick, Sch Engn, Warwick FIRE, Coventry CV4 7AL, England;[3]Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA;[4]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Shanghai 200237, Peoples R China;[5]Tsinghua Univ, Ctr Combust Energy, Beijing 100084, Peoples R China

年份：2023

卷号：39

期号：3

起止页码：2967

外文期刊名：PROCEEDINGS OF THE COMBUSTION INSTITUTE

收录：;EI(收录号：20223612687389);WOS:【SCI-EXPANDED(收录号:WOS:001022303500001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 22078095 and 51604121) and the Shang- hai Science and Technology Committee (Grant No. 20dz1200903 and 21QC1400400) . This work was also supported by the Individual Fellow- ship Scheme of the European Union's Horizon 2020 Marie Sklodowska-Curie Actions (Grant No. 891173, HYGAS) .

语种：英文

外文关键词：Hydrogen; Cryogenic temperature; Strong flame acceleration; Fast flame; Galloping mode

摘要：A series of experiments were carried out in a closed tube at cryogenic temperature (77 K) for hydrogenoxygen mixtures. Flame propagation speed and overpressure were measured by optical fibers and pressure sensors, respectively. The first and second shock waves were captured in the cryogenic experiments, although the shock waves always precede the flames in all cases indicating the absence of stable detonation. However, strong flame acceleration was observed for all situations, which is consistent with the prediction by expansion ratio and Zeldovich number. Besides, the tube diameter and length are also critical for flame acceleration to supersonic. All the flames in this work accelerate drastically reaching the C-J deflagration state. But at 0.4 atm, only fast flame is formed, while at higher initial pressures, the flame further accelerates to a galloping mode manifesting a near-limit detonation, which could be indicated by the stability parameter ?.(C) 2022 The Author(s). Published by Elsevier Inc. on behalf of The Combustion Institute. This is an open access article under the CC BY license ( http://creativecommons.org/licenses/by/4.0/ )