文献类型：期刊文献

英文题名：Flow regulation of fine particles by inducing resonance states under pulsed aeration

作者：Lu, Haifeng[1];Zhang, Liang[1];Li, Yifei[1];Guo, Xiaolei[1];Liu, Haifeng[1,2]

机构：[1]East China Univ Sci & Technol, Natl Energy Coal Gasificat Technol Res & Dev Ctr, State Key Lab Coal Liquificat Gasificat & Utilizat, Shanghai 200237, Peoples R China;[2]Liaoning Petrochem Univ, Fushun 113005, Liaoning, Peoples R China

年份：2026

卷号：468

外文期刊名：POWDER TECHNOLOGY

收录：;EI(收录号：20262821088364);Scopus(收录号：2-s2.0-105044303916);WOS:【SCI-EXPANDED(收录号:WOS:001570553600002)】；

基金：The authors acknowledge financial support from the National Nat-ural Science Foundation of China (51876066) and the Shanghai Engineering Research Center of Coal Gasification (18DZ2283900) .

语种：英文

外文关键词：Pulsed aeration; Agglomerates; Wavelet transforms; Coherence analysis; Resonance state

摘要：This study proposes a resonance state regulation strategy based on pulsed gas flow to address the common problems of agglomeration, channel flow, and discharge difficulty in fluidized beds of ultrafine particles (<100 mu m). By constructing a two-dimensional fluidized bed visualization experimental platform and combining wavelet transform and coherence analysis techniques, the coupling mechanism between the driven frequency and the natural frequency of the bed is systematically investigated. It is found that when the driven frequency (5 Hz) is close to the bed natural frequency (5 Hz for Al2O3 and 4 Hz for PVC), the system enters into a resonant state, which is manifested by the cross-scale coherence of the pressure signal in the cycle, the void ratio is increased to 15.2 %, and the agglomerate size is reduced to 5 mm (1/2 of the initial value). At this time, the bed pressure drop reaches the maximum value (Delta P = 1.85 kPa), and the gas-solid contact efficiency is significantly improved. It was further verified by discharge experiments under pulsed aeration that the solid discharge rate in the resonance state increased by 85.3 % (from 650 g/s) compared with that under continuous aeration. The results demonstrate that the resonant state can induce liquid-like flow characteristics in gas-solid coupled systems by enhancing the pressure drop in the bed, thereby effectively suppressing consolidation and channeling, and providing a novel method for improving and controlling the flowability of fine particles.