粒径对平底筒仓中心卸料的流态 及仓壁压力分布的影响Influence of particle size on the flow pattern and wall pressure distribution of central discharge in flat-bottom silo
旨在为筒仓的设计和优化提供参考,基于自主设计的半圆柱形有机玻璃平底筒仓模型,进行了平均粒径分别为15、3.5 mm和5.5 mm陶球颗粒的室内筒仓中心卸料试验和离散元数值模拟。采用流态观察、速度分析、颗粒位移追踪3种方法探究了3组粒径颗粒的流态演变过程,分析了仓壁压力分布及变化规律,通过PFC 2D得到孔隙率、力链等细观变量分布并联合宏观层次的物理试验探讨了粒径大小对流态及仓壁压力的影响。结果表明:粒径对颗粒流态的整体演化过程无显著影响,不同粒径颗粒的流态均由整体流经漏斗流过渡为管状流;大粒径颗粒完成卸料过程耗时更久,卸料速率更慢;粒径对颗粒的流动轨迹无显著影响;边界区并不是一成不变的,在卸...
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Main Author: | 杨世明1,刘克瑾2,姚辉江2,黄硕硕2,杜春来1,章敬波1 YANG Shiming1, LIU Kejin2, YAO Huijiang2, HUANG Shuoshuo2, DU Chunlai1, ZHANG Jingbo1 |
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Format: | Article |
Language: | English |
Published: |
中粮工科(西安)国际工程有限公司
2025-07-01
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Series: | Zhongguo youzhi |
Subjects: | |
Online Access: | http://tg.chinaoils.cn/zgyz/ch/reader/create_pdf.aspx?file_no=20250722&flag=1 |
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