化工学报 ›› 2021, Vol. 72 ›› Issue (9): 4553-4563.DOI: 10.11949/0438-1157.20210298

• 流体力学与传递现象 • 上一篇    下一篇

基于XCT的气固流化床布风板射流特征研究

刘曙光(),钟文琪(),陈曦   

  1. 能源热转换及其过程测控教育部重点实验室,东南大学能源与环境学院,江苏 南京 210096
  • 收稿日期:2021-03-01 修回日期:2021-05-17 出版日期:2021-09-05 发布日期:2021-09-05
  • 通讯作者: 钟文琪
  • 作者简介:刘曙光(1995—),男,硕士研究生,1605023158@qq.com
  • 基金资助:
    国家自然科学基金项目(51906042)

Experiment study of jetting characteristic in gas-solid fluidized bed using X-ray computed tomography

Shuguang LIU(),Wenqi ZHONG(),Xi CHEN   

  1. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, Jiangsu, China
  • Received:2021-03-01 Revised:2021-05-17 Online:2021-09-05 Published:2021-09-05
  • Contact: Wenqi ZHONG

摘要:

构建了X光层析成像(XCT)气固流动参数测量系统,基于锥形束滤波反投影算法(FDK)开发了CT三维重建软件,并设计了射流识别及量化算法。基于以上方法获得了不同流化风速下床料粒径dp、布风板孔口直径d0和布风板孔口均分面积A0对射流形态结构和几何特征的影响规律。结果表明平均射流长度L、最大直径D和体积V与床料粒径dp成反比,与孔口直径d0和孔口均分面积A0成正比,最终拟合了流化床平均射流长度关联式。

关键词: X光层析成像测量系统, 流化床, 射流, 介尺度, 多相流

Abstract:

An X-ray computed tomography (XCT) gas-solid flow parameter measurement system was constructed. The CT 3D reconstruction software was developed based on the cone beam filtered back projection algorithm (FDK), and the jet identification and quantification algorithm was designed. Based on the above method, the influence of bed material particle dp, the aeration plate orifice diameter d0, and the aeration plate orifice average area A0 on jet shape and geometric characteristics at different fluidization gas velocity are obtained. The results show that the average jet length L, the maximum diameter D, and the volume V are inversely proportional to the bed material particle dp, and directly proportional to the orifice diameter d0 and the average orifice area A0. Finally, the correlation equation of the average jet length of the fluidized bed is fitted.

Key words: XCT, fluidized-bed, jetting, mesoscale, multiphase flow

中图分类号: