Antiphase alternating-pulse fluidized bed for improving the fluidization quality: An Eulerian–Eulerian study

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2025-02-11 DOI:10.1002/aic.18754

Lingjie Zhang, Jiali Du, Feng Wu, Junwu Wang, Xiaoxun Ma

{"title":"Antiphase alternating-pulse fluidized bed for improving the fluidization quality: An Eulerian–Eulerian study","authors":"Lingjie Zhang, Jiali Du, Feng Wu, Junwu Wang, Xiaoxun Ma","doi":"10.1002/aic.18754","DOIUrl":null,"url":null,"abstract":"To address poor radial mixing in conventional pulsed fluidized beds (PFB), a novel antiphase alternating-pulse fluidized bed (AAPFB) is proposed to improve the fluidization quality by combining a well-designed air distributor and a non-steady-state gas intake technique. Detailed analysis of flow field differences among uniform flow fluidized bed (UFB), PFB, and AAPFB was conducted through numerical simulations, with a particular focus on examining variations in dispersion coefficients, elucidating the mechanism of the regulation of the flow fields by antiphase alternating pulsed airflow. The study also explored the modulation of inlet waveform, pulse frequency and vibration amplitude on flow characteristics. Results indicated that (i) AAPFB achieves uniform particle disturbance, significantly enhancing gas and particle dispersion; (ii) Rectangular flow improves particle distribution more than sinusoidal and triangular flows; and (iii) A 1 Hz pulse frequency and 0.3um amplitude optimally balances flow disturbances and bubble dynamics, resulting in superior dispersion for gas and particles.","PeriodicalId":120,"journal":{"name":"AIChE Journal","volume":"15 1","pages":""},"PeriodicalIF":3.5000,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"AIChE Journal","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1002/aic.18754","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}

引用次数: 0

Abstract

To address poor radial mixing in conventional pulsed fluidized beds (PFB), a novel antiphase alternating-pulse fluidized bed (AAPFB) is proposed to improve the fluidization quality by combining a well-designed air distributor and a non-steady-state gas intake technique. Detailed analysis of flow field differences among uniform flow fluidized bed (UFB), PFB, and AAPFB was conducted through numerical simulations, with a particular focus on examining variations in dispersion coefficients, elucidating the mechanism of the regulation of the flow fields by antiphase alternating pulsed airflow. The study also explored the modulation of inlet waveform, pulse frequency and vibration amplitude on flow characteristics. Results indicated that (i) AAPFB achieves uniform particle disturbance, significantly enhancing gas and particle dispersion; (ii) Rectangular flow improves particle distribution more than sinusoidal and triangular flows; and (iii) A 1 Hz pulse frequency and 0.3u_m amplitude optimally balances flow disturbances and bubble dynamics, resulting in superior dispersion for gas and particles.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.