文献类型：期刊文献

英文题名：Investigation of three-dimensional flow regime and mixing characteristic in T-jet reactor

作者：Zhang, Jing-wei[1];Liu, Shao-fan[1];Cheng, Chen[1];Li, Wei-feng[1];Xu, Xin-lei[1];Liu, Hai-feng[1];Wang, Fu-chen[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Coal Gasificat, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2019

卷号：358

起止页码：1561

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20184305992355);WOS:【SCI-EXPANDED(收录号:WOS:000450105700148)】；

基金：This study was supported by the National Natural Science Foundation of China (21776072, 91434130).

语种：英文

外文关键词：T-jet reactor; Engulfment flow; Oscillation; Mixing; PLIF

摘要：Three-dimensional flow regimes in the T-jet reactor were experimentally studied by planar laser induced fluorescence (PLIF) at 50 <= Re <= 560. The visualization images on cross-sections at different Reynolds numbers were obtained to investigate the engulfment flow regime and its influence on the mixing. With unsteady engulfment flow, periodic vortex merging in the impingement plane is observed and characterized. Results show that the merged vortex passes through the channel and causes periodic oscillation in the chamber. The effect of the confinement of the chamber wall on the engulfment flow regime was discussed. Large eddy simulation is also used to investigate the variation of pressure and velocity of the oscillation caused by the unsteady engulfment flow. Time-evolution and average of Intensity of Segregation (IOS) were quantitatively analyzed to reveal the mixing mechanism. Results show that the oscillation of vortex merging in the unsteady engulfment flow regime significantly improves the mixing performance.